Layers of Layers

Killing those annoying Mobile Broadcasts on O2 Germany

wonko — Thu, 15 Oct 2015 08:48:00 +0200

On the O2 Network in Germany my Cyanogen Phones all receive very annoying Mobile Broadcasts with just a Number in it.

I am guessing these are leftover Messages from Cell Tower switches or the like. They occur most often when travelling or in my home which has very bad reception.

Disabling the regular Mobile Broadcasts (Amber alerts) in Settings did nothing. So I had to figure out how to switch it off.

Open a console and become root(su). Then Look for the right Package in Android

#pm list packages -e | grep 'broadcast'
package:com.android.cellbroadcastreceiver

Disable it

#pm disable com.android.cellbroadcastreceiver
Package com.android.cellbroadcastreceiver new state: disabled

Symlinks in git repos checked out with Eclipse

wonko — Sun, 21 Sep 2014 21:00:00 +0200

The other day I was chasing ghosts for half a Day: I had a git repo in which all Symlinks
where replaced with a one line file containing the link target. WTF?

Only after a while it dawned on me that the only difference was that I had cloned the repo with Egit(Eclipse).
Egit is implemented in Java. Java has no symlink support (up to Java 7). OK. But why no symlinks with native git?
Because it was told so. The core section in the .git/config file looked like this:

[core]
    repositoryformatversion = 0
    filemode = true
    bare = false
    symlinks = false
    logallrefupdates = true

Notice 'symlinks = false'. Delete it and you are good for native git. You may have to reset/re-checkout.

But what about Eclipse/Egit?

There is a long running Bug in Eclipse Bugzilla: #354367
Wich says it is done for JGit the underlying library for egit. When you follow the referenced Bugs there it is also
said that this is done for Java 7/Egit. I am running Eclipse with Java 7 so where is it?

Hidden.

There is an extra Installable in the egit software repo in eclipse: Optional Java 7 libraries.

In Eclipse go to Help → Install New software.. → In the Work With: Dropdown select
egit - http://download.eclipse.org/egit/updates open the JGit Tree and install:
Java Implementation of Git - optional Java 7 libraries

Restart Eclipse. Clone a repo and there you are: Symlinks.

New Blog Home

Wonko — Mon, 15 Sep 2014 14:12:00 +0200

In case you are wondering: Yes this site is under construction.
I am reconstructing my site with Pelican here.

Using virt-manager as non root user in OpenSUSE 12.3

Wonko — Tue, 09 Jul 2013 16:51:00 +0200

Since PolicyKit was updated in 12.3 the information in the [OpenSUSE Docu Chapter 6.1.1.2][] is outdated. The polkit-auth command and /etc/PolicyKit/PolicyKit.conf do not exist any more. I tried to set the policy for org.libvirt.unix.manage via the KDE control center but this did not work. In the end I had to edit /etc/polkit-default-privs.local to contain: org.libvirt.unix.monitor yesorg.libvirt.unix.manage yes

and then run:

#set_polkit_default_privs

which created the Rules in /etc/polkit-1/rules.d/

directly write suse studio image to host using rescue system

Wonko — Sat, 18 May 2013 10:45:00 +0200

I recently rented a Virtual Root Server. I was in need of a fixed IPv4
adress since my Home Internet went IPv6 only ( Carrier side NAT sucks ).
So I went with a cheap one from active-servers. Unfortunately they
don't have SLES as a OS option. They do give you the ability to Install
from an Image. But the process involves sending them an Image and their
admins installing it. Not quick enough for me ;-)

What they do have is the ability to boot your vServer into a rescue
system. In this case the Debian rescue system but that does't really
matter as long the rescue system has:

Internet Access
(GNU) wget installed
(GNU) tar instelled

After that the process to install an Image from SUSE Studio is quite simple:

Go to susestudio.com and create your Image. Then Build it (USB sick/hard disk image). No need to publish (share) it, but why not?

Then copy the Download URL (Red Circle in Image below) from the Build page.

[![][]][]

Now boot your vServer into the rescue system. This differs a bit for different Hosters, but normally you log in to some virtual Console. Reboot and when you see the boot loader menu you select the rescue system. Sometimes you have to be quick as the menu is only displayed for a few seconds before the default is booted. When the rescue system is up test the internet connectivity:

ping google.com

btw. susestudio.com does not answer to pings. Don't be alarmed.

Then figure out which device is your Hard Disk

fdisk -lDisk /dev/vda: 53.7 GB, 53687091200 bytes255 heads, 63 sectors/track, 6527 cylinders, total 104857600 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x9602c78f

My system only has one disk ( /dev/vda ). If you have more be SURE to
select the right one. the Imaging process will overwrite this disk
COMPLETELY.
Now the hard part is over the following will in one command download
your susestudio image and write it to the disk:

wget -O- http://url from above | tar xvzO > disk from above

For my System it looked like this:

wget -O- http://http://susestudio.com/download/12345/imagename.x86_64-0.0.2.oem.tar.gz | tar xvzO > /dev/vda

What it all means:

wget -O- http://xyz/path/file.tar.gz

-O The documents will not be written to the appropriate files, but
all will be concatenated together and written to file. If - is used
as file, documents will be printed to standard output so "-O-" sends
everything to stdout.

| tar xvzO

| The output of wget is piped into tar

x Extract the content
v Be Verbose (for us Humans)
z The Archive is gz compressed so uncompress it with gzip
O Extract files to standard output (stdout)

> /dev/vda

The output of tar is written to the /dev/vda Device

Have fun!

[![][]]: http://4.bp.blogspot.com/-8GKz8hoQWoY/UZdTw_Nh2oI/AAAAAAAADC4/DudvZ86P2go/s1600/susestudio.png

Linux Touch Screen Games for Kids on the Raspberry Pi

Wonko — Sat, 18 May 2013 09:26:00 +0200

I have little Touch screen Computer sitting in the living Room for the Kids. This is the only Computer in my home that the Kids have unattended
access to. In the past I used an (relly) old Laptop to drive it. I am currently refitting it with a Raspberry Pi.
I am trying to keep the tinkering to a minimum. I am keeping the original Raspbian LXDE Desktop. Just removed all the Desktop Icons and enlarged the Icons for better Touch screen access.

The focus is on a completely Keyboard/Mouse-Less Device. For emergencies I am using the matchbox-keyboard.

Here is a List of Games / Software I reviewed

Games

Name/ Package	In Raspian Repo	Full Screen	Touch Screen	Notes
gpe-tetris	yes	no	no	May work with an USB controller. Needs only cursor keys.
tuxfootball	yes	yes	no	May work with an USB controller. Needs only cursor keys + shift
supertuxkart	yes	yes	?	Crashes. Out of memory?
pingus	yes	yes	yes	Works well, may get slower in higher levels (more sprites)
neverball	yes	yes	?	Unusable slow
fish fillets	no
frozen-bubble	yes	yes	no	has switches to turn off animations. Unfortunately no Mouse Mode.
monkey bubble	no
pygame bubble shooter	no		yes
gamine	yes	yes	no	Does not work too well with touch screen. Needs keyboard to quit the game.
Hex-a-Hop	yes	yes	yes, but	Works well but games cannot be ended without a keyboard in full screen.
Numpty Physics	yes			Crashes on raspbian
penguinspuzzle	yes	yes	no	Darn! A 3d game on the pi and no touch screen support.
KTuberling	yes	yes	yes	Works. Gameplay is somewhat limited.
etw	yes	yes	no
bumprace	yes	yes	no	Needs Cursor Keys

Educational

Name/ Package	In Raspian Repo	Full Screen	Touch Screen	Notes
tuxpaint	yes	yes	yes	Works well.
gcompris	yes	yes	yes	Work well. Slow only when accessing files. Some activities need a Keyboard.

http://wiki.debian.org/Games/Touchscreen

http://gamerunner.sourceforge.net/

http://wiki.openmoko.org/wiki/Category:Gaming

Boing

Wonko — Sun, 05 May 2013 08:15:00 +0200

Klappbares Hochbett

Wonko — Sun, 23 Sep 2012 10:16:00 +0200

Hochbetten haben die eigenschaft nicht all zu hoch zu sein.
Man möchte sich ja im Bett noch hinsetzen können.
Intro Klappbett:
http://gizmodo.com/5943642/clever-folding-bunk-bed-leaves-so-much-extra-space-for-activities
Allerdings hat dieses zwei kapitale Designfehler:

Wer gibt \~€2500 für ein Kinderbett aus?
Unter dem unterem Bett ist nicht genug Platz. Da muss eine
Aufgebaute Lego-Stadt (oder so) drunterpassen.

Ich tippe mal mit Leimholz für €250 + Kleinteile liesse sich das Bauen.

Smooth 2D Pictograms

Wonko — Tue, 18 Sep 2012 17:25:00 +0200

Just found a really cool collection of 2D Pictograms:

http://thenounproject.com

[![][]][]

“Cat” symbol by Luis Martins, from The Noun Project collection.( CC BY 3.0 )

Touch Screen on RaspBerry Pi (Raspian)

Wonko — Sun, 16 Sep 2012 19:43:00 +0200

I am Using an Elotouch 1529l with an RPi as a Kids-Computer. the touch screen worked Out of the Box. (evdev Module) unfortunately the Y-Axis was swapped and the calibration way off. I followed [these][] instructions (Ubuntu Forum). In short Edit */usr/share/X11/xorg.conf.d/10-evdev.conf* adding Option "InvertY" "true" Then run *sudo evtest /dev/input/eventX* Write down the min/max of x/y Option "Calibration" "486 3553 602 3490"

Make Thunderbird 3 in OpenSuse 11.3/KDE open Chrome

Wonko — Wed, 06 Jun 2012 14:01:00 +0200

[Update for Thunderbird 8 in OpenSUSE 12.1/KDE below] Thunderbird uses gconf even when running in KDE. For some reason when you tell Chrome to be your default Browser it misses out configuring gconf. Fire up a shell and type: gconftool-2 -g /desktop/gnome/url-handlers/http/command You will see something like: /usr/bin/firefox "%s" To change this over to chrome type: gconftool-2 --type string -s /desktop/gnome/url-handlers/http/command "google-chrome %s" Restart Thunderbird. And now http(s) links should open in Chrome. [Update] TB \> 4.x uses the xdg settings to determine the right thing to do. Unfortunately on my Opensuse 12.1/KDE Box these seem not to be set by google-chrome. I found the Solution [here][]. Aparently Google Chrome only sets the default browser for the "text/htm" Mime Type. Links seem to be clasefied "x-scheme-handler/http". To fix this add the following line line to \~/.local/share/applications/mimeapps.list x-scheme-handler/http=google-chrome.desktop [Update 2] Chrome 19 on OpenSuse 12.1/KDE failed to set the default Browser at all. I had to manually check the default setting in KDE System Settings-\>Default Applications

Trying to return an unneeded and unwantet license of Windows

Wonko — Wed, 10 Aug 2011 17:08:00 +0200

Category: Software
Slug: trying-to-return-unneeded-and-unwantet

I just bought a Dell Inspiron Duo for my wife. Naturally I installed Linux to it: Now I try to return the License for Windows 7 Home Premium that came with the device. **First try ** Call Dell Support ( I am in Germany +49 69 9792 7200 ) I chose sales (out of tech support, shipping info and sales) to ask what to do: I explained that I just bought the Device and that I want to return the Windows license. She asked me where I bought it. I answered: In a Shop. Then She told me I should complain to the shop. I answered that this was not a complaint but that I wanted to return Windows. She hung up. **Second try** A mail via the Dell Support Website Service-Tag-Nummer: 3LSQXN1Systemtyp: Inspiron Inspiron duoLieferdatum: 06.01.2011Land: GermanyInformationen zum Incident/ProblemArt des Incident: Operating SystemBetriebssystemtyp: Windows 7Betriebssystemversionen: Home PremiumWelches Problem tritt auf? Wann und wo tritt es auf?Ich möchte meine Lizenz von Windows 7 Home Premium zurückgeben. Auf einem neu erworbenem Inspiron Duo (3LSQXN1) wurde Linux installiert. Windows wurde entfernt. (siehe meine anleitung unter http://www.wonko.de/2011/08/opensuse-114-on-dell-inspiron-duo-1090.html) Da ich sowohl beruflich als auch Privat viele Dell Notebooks einsetze (C620, D620,D820,E6500) wäre es schade wenn ich weiter gezungen wäre Windows zu erwerben, da ich im Suse Linux Consulting arbeite.Falls Ihnen eine Fehlermeldung angezeigt wird, geben Sie bitte den Text der Meldung an.Wurden kürzlich Änderungen an dem System vorgenommen?OpenSuse 11.4 installiertWelche Schritte haben Sie unternommen, um das Problem zu beheben oder um es zu isolieren?Telefonsupport angerufen (Vertieb) dort wollte man sich der sache aber anscheinend nicht annehmen. (Es wurde aufgelegt) I recieved an answer: Schoenen guten Tag Herr Prause,vielen Dank fuer Ihre E-Mail.Ihr Rechner wurde nicht direkt bei Dell gekauft.In diesem Fall wuerde ich Ihnen empfehlen, sich an den Verkaeufer zu wenden.Eine Rueckgabe der Windows-Lizenz wird aber hoechstwahrscheinlich nicht moeglich sein.Benutzen Sie bitte immer dieselbe E-Mail Adresse von der Sie uns Antworten und loeschen Sie nicht die vorherige Kommunikation sowie den Subjekt der Nachricht damit es nicht zu Verzoegerungen in der Antwortzeit unsererseits kommt.Wir werden Sie nach 2 Tagen von CER_Services_Email1@Dell.com kontaktieren um sicherzugehen dass Sie diese E-Mail von uns bekommen haben.Ich verbleibe mit freundlichen Gruessen und Ich wuensche Ihnen ein schoenes Wochenende At least this guy was very friendly! Now I will try the Shop. I find this rather odd since all the enclosed Documentation of the Netbook points towards Dell.

OpenSuse 11.4 on Dell Inspiron Duo 1090

Wonko — Wed, 10 Aug 2011 17:07:00 +0200

My Wife is a teacher and wanted "one of these small PC thingies" to
carry around all day.

So I bought her a Dell Inspiron Duo, because she also wants "one of
those touch pad thingies" ;-)

Since all of our household PCs run OpenSuse the Netbook had to have it
too. I was tempted to go for a more touch friendly Linux distro like
Meego but decided against it. The differences would have been to
confusing for the user. Btw. I will try to get a refund or at least
store credit for the unused/unwanted Windows that came with the Netbook.
I will Post here how that goes.

The Inspiron Duo has no DVD Drive so I installed using an external USB
Drive (had no 4GB+ Stick). The installation went without fuzz ( Follow
Instructions on: http://en.opensuse.org/SDB:Live_USB_stick ):

Download the install ISO

Patch the iso for USB Booting:

# zypper in syslinux# isohybrid openSUSE-11.4-DVD-x86_64.iso

Copy the ISO to the drive

# sudo zypper in ddrescue# sudo umount /dev/sdXY# dd_rescue openSUSE-11.4-KDE-LiveCD-x86_64.iso /dev/sdXY

Boot from the USB drive
Install

Pretty much everything worked out of the Box. Except for:

The Touch screen -> Works after installing Drivers
The Microphone (Speakers work) -> Works after setting Sound Module
Options
The KDE Networkmanager -> Works after upgrading KDE (WLAN itself
work out of the Box)

** ** **Touch Screen** For the Touch Screen I installed the Driver provided by the Manufacturer:

- Download 64Bit from - Extract the Tarball and run the setup sh #wget http://home.eeti.com.tw/web20/drivers/touch_driver/Linux/20110406/eGalaxTouch-3.05.5025-64b-k26.tar.gz#tar xvzf eGalaxTouch-3.05.5025-64b-k26.tar.gz #sudo sh setup.sh - Choose USB (3) when asked - Then copy the created config file to /etc/X11/xorg.conf.d sudo cp /usr/local/eGalaxTouch64/Rule/50-egalax.con /etc/X11/xorg.conf.d/ - Reboot. Then run the eGalacTouch tool #sudo zypper in libpng12-0 (needed by eGalaxTouch)#eGalaxTouch - Calibrate in eGalaxTouch -\> Tool -\> 4Pts Cal

Hints: If you read other Forums ( [link][] [link][1] ) you might see a need for putting an usbhid.quirks option into grub config. This is apparently not necessary with OpenSuse 11.4 (+updates).

**Microphone** Here YaST correctly identified snd-hda-intel as the right module. Unfortunately this is not enough. After some trying around I figured out two things. I had a conflicting "options snd slots=snd-hda-intel..." line in a file in /etc/modprobe.d (all files are read not just .config ones) and the alsa-firmare was not installed. zypper in alsa-firmware My /etc/modprobe.d/50-sound.conf after editing alias snd-card-0 snd-hda-inteloptions snd_hda_intel model=ideapad

KDE Networkmanager

This is actually not related to the Inspiron DUO. But since the DUO has
WLAN only I had to have it fixed.

The KDE Networkmanager that comes with OpenSuse 11.4 (+Updates) seems to
broken for some Intel WLAN Cards. I have the same problem with Dell
E6500. The Networkmanager will simply drop connections with WPA2 after a
few Minutes/Seconds. For no good reason.

My fix: Upgrade to KDE 4.7 (see
http://en.opensuse.org/KDE_repositories )

sudo zypper ar --check --refresh http://download.opensuse.org/repositories/KDE:/Release:/47/openSUSE_11.4/ KDE47-Coresudo zypper ar --check --refresh http://download.opensuse.org/repositories/KDE:/Extra/KDE_Release_47_openSUSE_11.4/ KDE47-Extrasudo zypper dup

Goodies

I installed Chrome as the default Browser. It simply behaves better that
Firefox on low Power Devices.
The chromeTouch Extension enables Touch Pad like scrolling.

I use Kvkbd as an on Screen (touch) keyboard

From the OpenSuse Education Projects
( http://en.opensuse.org/Portal:Education ) I installed:

Childsplay ( http://www.schoolsplay.org
/ http://en.opensuse.org/Childsplay ) and
tuxpaint ( http://tuxpaint.org )
gcompris ( http://gcompris.net/-en- )

SLES 9 going out of General Support

Wonko — Tue, 28 Jun 2011 09:09:00 +0200

[![][]][]

Suse Linux Enterprise Server 9 ( SLES 9 ) was released on August 4th
2004.

And after 7 Years of General Support and two new Major Releases (SLES
10&11) is going "End of Life" on August 31st 2011.
See: http://lists.opensuse.org/opensuse-security-announce/2011-06/msg00014.html

This means you now have three options

Migrate to SLES 11
http://support.novell.com/inc/lifecycle/linux.html
Buy Long Term Service Pack Support:
http://www.novell.com/linux/service-pack-support.html
Use Self support:
http://support.novell.com/support_options.html?tab=1

SLES 9 is out of Support!
Please upgrade to SLES 11 ASAP!

SLES 10 SP4 Released

Wonko — Thu, 14 Apr 2011 13:08:00 +0200

[![][]][]

Suse Linux Enterprise Server 10 SP4 ( SLES 10 SP4 ) was released on
April 12th 2011.

See: http://www.novell.com/linux/releasenotes/
http://support.novell.com/inc/lifecycle/linux.html

This means that you have to upgrade your SLES 10 SP3 installations to
SP4 within 6 Months of the release to continue receive Support for SLES
10. As an alternative you can purchase Long Term Service Pack
Support: http://www.novell.com/linux/service-pack-support.html

SLES 10 SP3 is out of Support!
Please update to SLES 10 SP4 ASAP!

Set up git on Synology NAS

Wonko — Sat, 15 Jan 2011 14:14:00 +0100

I just installed a NAS at home.
It's going to be my primary Data Silo so naturally I need to store my
(backup-/published-) git repos there.

The Synology thing I bought comes with Linux/Busybox. Hacking around is
surprisingly easy, they actually encourage you to do it.

Of course I could have gone the easy way of nfs-mounting my shares and
then have used local paths to update the repos. But I wanted to be able
to do this from the road using ssh. So I needed git to be Installed.

Here is what I needed to do to install git on the Box:

Open ssh. Easy its in the GUI.
Create users and shares
Set up your User accounts to:
Have a proper Home Directory
- Be able to log in using Public/Private keys
Configure Additional Software Repositories
Install git
Configure sshd so that git+ssh works

1. Open ssh

Open the Web interface of the Box.
Select the "Management" View.
Go to "Network Services" -> "Terminal"
Select "Enable SSH service" and click "OK"
done

2. Create users and shares
Go to "Privileges" -> "User" and create a User
We need at leas one share to be able to transfer a File to the Box.

3.Set up your User accounts
Use ssh to log in as "root" on the box. Use the "Admin" password that
you provided when
Initially setting up the NAS.

You will see the Busybox promt:

BusyBox v1.1.0 (2010.03.12-16:58+0000) Built-in shell (ash)Enter 'help' for a list of built-in commands.syn>

create home directories for your users:

mkdir -p /volume1/home/user1

Then edit /etc/passwd to enable the user for ssh use. We change he home
dir set the login shell:

...user1:x:1026:100::/volume1/home/user1:/bin/sh...

By the way. /bin/sh is NOT Bash here. Its Busybox (ash).
Now you should be able to access the NAS through ssh with that user.

For convenience we want to be able to use Public/Private keys for
login:

Edit /etc/ssh/sshd_config and change the Lines regarding Public Key
Authentication:

...PubkeyAuthentication yesAuthorizedKeysFile      .ssh/authorized_keys...

Restart sshd:

/usr/syno/etc/rc.d/S95sshd.sh restart

Oddly this sometimes only works half way. If your sshd does not come
back, simply switch it back on in the Web interface.

Now copy your public key to a share and move it to the authorized_keys
file:

mkdir -p /volume1/home/user1/.sshmv /volume1/someshare/id_dsa.pub /volume1/home/user1/.ssh/authorized_keys

Now you should be able to log in without a password.

4. Configure Additional Software
Repositories

Pretty straight forward as described in the Synology wiki

Copy the boostrap file to a Share (
syno-mvkw-bootstrap_1.2-7_arm.xsh), then run it as root on the box:

sh /volume1/someshare/syno-mvkw-bootstrap_1.2-7_arm.xsh

5. Install git
Look for the git package:

ipkg list|grep gitdcraw - 1.376-2 - Decoding raw digital photos.digitemp - 3.6.0-1 - Reads 1-Wire Temperature sensor (http://www.digitemp.com)git - 1.6.6.2-1 - GIT is a directory tree content manager that can be used for distributed revision control.git-lite - 1.6.6.2-1 - GIT is a directory tree content manager that can be used for distributed revision control.git-manpages - 1.6.6.2-1 - manpages of gitgit-svn - 1.6.6.2-1 - git as svn clientgitosis - git20090917-1 - Git repository hosting application.gphoto2 - 2.4.1-1 - Command line digital camera software applicationslibdlna - 0.2.3-2 - Reference DLNA (Digital Living Network Alliance) open-source implementation for Linux.libgphoto2 - 2.4.1-1 - digital camera software librariessane-backends - 1.0.20+git20091022-1 - SANE is a universal scanner interfacesqueezecenter - 7.3.3-1 - Streaming Audio Server for Logitech Squeezeboxstgit - 0.14.3-2 - StGit is a Python application providing similar functionality to Quilt (i.e. pushing/popping patches to/from a stack) on top oftig - 0.15-1 - Tig is a git repository browser that additionally can act as a pager for output from various git commands.

Install it:

ipkg install git

Now we can create a repo for publishing. Log in as your user:

mkdir -p /volume1/git/testcd /volume1/git/testgit init --bareInitialized empty Git repository in /volume1/git/test/

6.Configure sshd so that git+ssh
works
Now git works in regular login shells. When using git to clone the new
repo this fails:

git clone ssh://192.168.178.29/volume1/git/testInitialized empty Git repository in /data/t/.git/sh: git-upload-pack: not foundfatal: The remote end hung up unexpectedly

This means that the "git-upload-pack" on the NAS was not found in the
\$PATH.
The ipkg Packages are installed to /opt/(s)bin which is not in sshds
standard path.
Since sshd for BusyBox was configured not to parse /etc/profile or
\~/.profile we have to fall back to providing a \~/.ssh/environment file
with the correct path:

PATH=/opt/bin:/opt/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/syno/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/syno/bin:/usr/syno/sbin:/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/syno/bin:/usr/syno/sbin:/usr/local/bin:/usr/local/sbin

The Path can be copied from /root/.profile
To switch on user environments in sshd, configure /etc/ssh/sshd_config: ...PermitUserEnvironment yes...

Then restart sshd.

Have fun!

Oracle Express 10g (Oracle XE) on Suse Linux Enterprise 11 (SLES 11)

Wonko — Mon, 23 Aug 2010 10:23:00 +0200

Sometimes things are simple. I was having troubles to install Oracle XE on a SLES 11 Box. The Lister would start. But not the Web Interface (http://localhost:8080/apex) Since my Oracle knowledge is limited I was stuck. Only [this][] Post gave me a hint where to look oracle@ivml2114:~/app/oracle/product/10.2.0>./server/bin/oracle_env.sh oracle@ivml2114:~/app/oracle/product/10.2.0> lsnrctl start LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 23-AUG-2010 11:29:42Copyright (c) 1991, 2005, Oracle. All rights reserved.TNS-01106: Listener using listener name LISTENER has already been startedoracle@ivml2114:~/app/oracle/product/10.2.0> sqlplus /nolog SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 23 11:30:00 2010Copyright (c) 1982, 2005, Oracle. All rights reserved.SQL> connect sys/ as sysdbaoracleXE: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directoryERROR: ORA-12547: TNS:lost contact Bingo! This is a 64 Bit System. Oracle Xe is 32 Bit. Argh. I did check for the dependencie mentioned in the Oracle docu. But of course missed this. #zypper in libaio-32bit To be sure I then re-installed Oracle XE. And you know what? It Works!

Using ifup/down with local Lan and Wireless

Wonko — Mon, 23 Aug 2010 10:23:00 +0200

I have a Notebook sitting in the living room. Its mostly for reading Mails/Blogs, checking the Weather. Occasionally I hook it up to the TV to watch Movies. Here's where the trouble starts: To do that I connect the Notebook to a Physical Network for Bandwidth reasons. The Movies sit on a NAS. I configured the Notebook to be on IfUp/-Down in contrast to using Networkmanager since It will only connect to one pre-configured Wireles LAN. This way I am able to remotely connect to the Notebook even though nobody is logged in. The NM will only connect on login. My FritzBox hands out IP-Addresses from the same Subnet to all Clients on WLAN and LAN. This causes troubles when the Notebook is connected to the Physical LAN. The WLAN and LAN interface compete to be the default gateway. After plugging in the routing gets mixed up and I loose connection. The solution is easy: Tell ifplugd to switch off the other Card on Ifup. In Yast I configured the Devices to be started on cable connect. This changes the /etc/sysconfig/network/ifcfg-eth0 and ifcfg-wlan0 files to : ... STARTMODE='ifplugd'... Then I changed the Script /etc/ifplugd/ifplugd.action. The script is called whenever a change in connection is detected by ifplugd. Its called with the Device (et0/wlan0) as \$1 and the command (up/down) as \$2. My change simply Downs the respective "other" Interface: ...[ "$1" = eth0 ] OTHER = wlan0 [ "$1" = wlan0 ] OTHER = eth0 [ "$2" = "up" ] && exec /sbin/ifup $1 -o ifplugd && exec /sbin/ifdown $OTHER [ "$2" = "down" ] && exec /sbin/ifdown $1 -o ifplugd && exec /sbin/ifup $OTHER ... I only tested this on OpenSuse 11.3 but I think it will work with most other Distros that have ifplugd,

1000 Words

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

A Picture says more than a thousand words. Also Presentations look a lot
less boring with the occasional picture.

http://www.pixelio.de

Has many royalty free Pictures of various Categories

50 Beautiful Wordpress Themes

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Incomplete since lacking Freshy!

http://sixrevisions.com/resources/50-beautiful-free-wordpress-themes/

Bash History Explained

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Nice post on Bash History goodies:

http://blog.macromates.com/2008/working-with-history-in-bash/

Cleaning a Hard Drive

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Recovering deleted files from Hard Drives is not as hard as one might
think. Simplified its mostly only a removal of the Index entry pointing
to the space occupied by the data.

If you want to make sure that the Data is destroyed you have to make
sure that is overwritten. Actually it needs to be overwritten multiple
times with random data so that recovering the data becomes really hard.

I use scrub (diskscrub package / http://diskscrub.sourceforge.net )
before giving away Drives. scrub also has a feature where it fills
up the remaining space of a file system. This helps if you need to get
rid of some NDA stuff and don't want to nuke the whole thing.

scrub can write patterns direct to disk, destroying any file system
(preferred method), or it can write patterns on files, or on file system
free space.

Scrub writes NNSA NAP-14.x, DoD 5220.22-M, BSI, 35-pass gutmann, or one
of several other selectable pattern sequences.

Diskscrub in the openSUSE buildservice:
http://download.opensuse.org/repositories/home:/elvigia/

Colored root prompt in SLE* 10

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

In openSUSE \> 10.3 you get a colored root (red) promt. To achieve this in SLE/SLED 10 simply drop the following in /etc/bash.bashrc.local (create it if it doesn't exist) : if test "$UID" -eq 0 -a -t && type -p tput > /dev/null 2>&1 ; then _bred="$(tput bold 2> /dev/null; tput setaf 1 2> /dev/null)" _sgr0="$(tput sgr0 2> /dev/null)" PS1="\[$_bred\]$PS1\[$_sgr0\]" unset _bred _sgr0fi See [Bug \#144620][] for further info.

Comented JavaScript guide

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Marijn Haverbeke has written an (opinionated) book on programing with
JavaScript:

http://eloquentjavascript.net/

.. Eloquent JavaScript is a digital book providing a comprehensive
introduction (tutorial) to the JavaScript programming language. Apart
from a bookful of text, it contains plenty of example programs, and an
environment to try them out and play with them...

Configure netconfig for modem use

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

I wrote this one for Novell's Cool Solutions:
[http://www.novell.com/communities/node/6781/configure-netconfig-modem-use
][]
In SLE11 we have a new (better) way to set up automatic network
configuration.

Its called netconfig (man 8 netconfig). Its a "modular tool to modify
network configuration".

Well in my SLED11 RC1 Box it pretty much worked out of the box. Except:

When using Modem devices (eg UMTS/G3 via a Phone) DNS Servers where
not added to /etc/resolv.conf
Static search entries did not work / where overwritten by
NetworkManager

Netconfig uses a bunch of scripts in /etc/netconfig.d to do the actual
work. Its configuration resides in /etc/sysconfig/network/config

The following tries to fully explains what is happening. If you're just
interested in the Solution skip down to Summary.

The modem device Problem

I use a Nokia E51 for UMTS/3G Internet connection when on the road. The
setup is fairly easy using a USB Cable. Just plug in the Phone and
configure it as if it was a USB Modem. (for Bluetooth setup see
Accessing the Internet via Bluetooth and Mobile Phone )

Unfortunately when I do that I never got DNS servers put into
/etc/resolv.conf.

What is happening

netconfig uses a bunch of script (modules) to decide what to do in
certain situations. The Modules are configured using the NETCONFIG*
Variables in /etc/sysconfig/network/config.

The variable NETCONFIG_DNS_POLICY is used to control how netconfig
should set up Name Servers in /etc/resolv.conf

Excerpt from /etc/sysconfig/network/config (default):

...## Type:        string## Default:     "auto"## Defines the DNS merge policy as documented in netconfig(8) manual page.# Set to "" to disable DNS configuration.#NETCONFIG_DNS_POLICY="auto"...

Unfortunately man 8 netconfig only has this to say about
NETCONFIG_DNS_POLICY:

NETCONFIG_DNS_POLICY -Defines the DNS merge policy.

Nothing about what the actual Values could be.

The /etc/netconfig.d/dns-resolver script is responsible for setting
resolv.conf so we find our possible values here:

Excerpt from /etc/netconfig.d/dns-resolver (SLED 11 Rc1 Version):

...# just for the case we need the original value..._NETCONFIG_DNS_POLICY="$NETCONFIG_DNS_POLICY"if [ "$_NETCONFIG_DNS_POLICY" = "auto" ]; then    if [ "x$NETWORKMANAGER" = "xyes" ] ; then        #        # Use NetworkManager policy merged data        #        _NETCONFIG_DNS_POLICY='STATIC_FALLBACK NetworkManager'    else        #        # We use static settings and extend them        # with interface specific if available        #        _NETCONFIG_DNS_POLICY='STATIC *'    fielif [ "x$_NETCONFIG_DNS_POLICY" = "x" ]; then    #    # empty policy means do not touch anything.    # successful exit.    #    exit 0;fi## A * or ? is evaluated in the "for loop", so we need to replace it#_NETCONFIG_DNS_POLICY=`echo "$_NETCONFIG_DNS_POLICY" | \        sed 's/\*/__ALL__/g' | sed 's/\?/__ONE__/g'`sf=0for POL in $_NETCONFIG_DNS_POLICY; do    case "$POL" in    (NetworkManager)        if [ "x$NETWORKMANAGER" = "xyes" ] ; then            debug "Use NetworkManager policy merged settings"            CFG="$STATEDIR/NetworkManager.netconfig"            if [ -r "$CFG" ] ; then                get_dns_settings "$CFG"            fi            break        fi    ;;    (STATIC)        debug "Keep Static"        DNS_SEARCHLIST="$DNS_SEARCHLIST $NETCONFIG_DNS_STATIC_SEARCHLIST"        DNS_SERVERS="$DNS_SERVERS $NETCONFIG_DNS_STATIC_SERVERS"    ;;    (STATIC_FALLBACK)        debug "Static Fallback"        sf=1    ;;    (*)        #        # revert the replacement; now we want the evaluation        #        POL=`echo "$POL" | sed 's/__ALL__/*/g' | sed 's/__ONE__/?/g'`        debug "Other: $POL"        for IFDIR in $STATEDIR/$POL; do            test -d "$IFDIR" -a \                 -d "/sys/class/net/${IFDIR##*/}" || continue            # proceed every interface we find with this match            manage_interfaceconfig  "$IFDIR"        done    ;;    esacdone...

This tells us that we can use the values auto, STATIC,
STATIC_FALLBACK, NetworkManager and /sys/class/net/ Interfaces (
with * and ? wildcards ).

The Cause

What it also tells us is that the default auto only is translated to
STATIC_FALLBACK NetworkManager and no devices.

This is why any ppp or modem device connections will not be used for
Name Server setup in the default configuration.

There is a good reason for that. /etc/resolv.conf only supports up to 3
nameserver Entries.

This means if you have for instance 2 DNS Servers in ppp and 2 more
coming from NetworkManager one is going to fall off the grid.

So for the sake of a stable NetworkManager setup the default was chosen
to not include ppp* or modem* devices. See [bnc#429772][] )

The Solution

Configure NETCONFIG_DNS_POLICY to include all Network Devices we need.
In my case I need modem0. Of cource preserve STATIC and
NetworkManager as well. Put NetworkManager last. Its a bit of a
Bully and wants to be the last one to do things.

Excerpt from /etc/sysconfig/network/config

NETCONFIG_DNS_POLICY="STATIC_FALLBACK modem* NetworkManager"

Et voila! Working DNS resolving when dialing in via Modem.

Summary

To be able to have DNS resolution when dialed in via modem configure
netconfig to look for your (ppp or modem) devices:

Excerpt from /etc/sysconfig/network/config

NETCONFIG_DNS_POLICY="STATIC_FALLBACK modem* NetworkManager"

Please be aware that all sources might provide Name Servers. This could
mean that there will be more that the max of 3 for /etc/ressolv.conf.

[http://www.novell.com/communities/node/6781/configure-netconfig-modem-use
]: http://www.novell.com/communities/node/6781/configure-netconfig-modem-use

Configure netconfig for static search domains

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

I wrote this for Novell's Cool
Solutions:http://www.novell.com/communities/node/6782/configure-netconfig-static-domain-search-lists

In SLE11 we have a new (better) way to set up automatic network
configuration.

Its called netconfig (man 8 netconfig). Its a "modular tool to modify
network configuration".

Well in my SLED11 RC1 Box it pretty much worked out of the box. Except:

When using Modem devices (eg UMTS/G3 via a Phone) DNS Servers where
not added to /etc/resolv.conf ( see [bnc#429772][] )
Static search entries did not work / where overwritten by
NetworkManager

Netconfig uses a bunch of scripts in /etc/netconfig.d to do the actual
work. Its configuration resides in /etc/sysconfig/network/config

The following tries to fully explains what is happening. If you're just
interested in the Solution skip down to Summary.

The Search Domain Problem

If you're just as lazy as me you don't want to type Fully Qualified
Domain Names all the time. Of course you could use /etc/hosts but thats
boring and not very transportable.

So I set up NETCONFIG_DNS_STATIC_SEARCHLIST in
/etc/sysconfig/network/config. But it doesn't work when using
NetworkManager. The NM overwrites the search entries in /etc/resolv.conf
if it finds something in DHCP. Bummer.

What is happening

netconfig uses a bunch of script (modules) to decide what to do in
certain situations. The Modules are configured using the NETCONFIG*
Variables in /etc/sysconfig/network/config.

The variable NETCONFIG_DNS_POLICY is used to control how netconfig
should set up Name Servers in /etc/resolv.conf

Excerpt from /etc/sysconfig/network/config (default):

...## Type:        string## Default:     "auto"## Defines the DNS merge policy as documented in netconfig(8) manual page.# Set to "" to disable DNS configuration.#NETCONFIG_DNS_POLICY="auto"...

Unfortunately man 8 netconfig only has this to say about
NETCONFIG_DNS_POLICY:

NETCONFIG_DNS_POLICY -Defines the DNS merge policy.

Nothing about what the actual Values could be.

The /etc/netconfig.d/dns-resolver script is responsible for setting
resolv.conf so we find our possible values here:

Excerpt from /etc/netconfig.d/dns-resolver (SLED 11 RC1 Version):

...# just for the case we need the original value..._NETCONFIG_DNS_POLICY="$NETCONFIG_DNS_POLICY"if [ "$_NETCONFIG_DNS_POLICY" = "auto" ]; then    if [ "x$NETWORKMANAGER" = "xyes" ] ; then        #        # Use NetworkManager policy merged data        #        _NETCONFIG_DNS_POLICY='STATIC_FALLBACK NetworkManager'    else        #        # We use static settings and extend them        # with interface specific if available        #        _NETCONFIG_DNS_POLICY='STATIC *'    fielif [ "x$_NETCONFIG_DNS_POLICY" = "x" ]; then    #    # empty policy means do not touch anything.    # successful exit.    #    exit 0;fi## A * or ? is evaluated in the "for loop", so we need to replace it#_NETCONFIG_DNS_POLICY=`echo "$_NETCONFIG_DNS_POLICY" | \        sed 's/\*/__ALL__/g' | sed 's/\?/__ONE__/g'`sf=0for POL in $_NETCONFIG_DNS_POLICY; do    case "$POL" in    (NetworkManager)        if [ "x$NETWORKMANAGER" = "xyes" ] ; then            debug "Use NetworkManager policy merged settings"            CFG="$STATEDIR/NetworkManager.netconfig"            if [ -r "$CFG" ] ; then                get_dns_settings "$CFG"            fi            break        fi    ;;    (STATIC)        debug "Keep Static"        DNS_SEARCHLIST="$DNS_SEARCHLIST $NETCONFIG_DNS_STATIC_SEARCHLIST"        DNS_SERVERS="$DNS_SERVERS $NETCONFIG_DNS_STATIC_SERVERS"    ;;    (STATIC_FALLBACK)        debug "Static Fallback"        sf=1    ;;    (*)        #        # revert the replacement; now we want the evaluation        #        POL=`echo "$POL" | sed 's/__ALL__/*/g' | sed 's/__ONE__/?/g'`        debug "Other: $POL"        for IFDIR in $STATEDIR/$POL; do            test -d "$IFDIR" -a \                 -d "/sys/class/net/${IFDIR##*/}" || continue            # proceed every interface we find with this match            manage_interfaceconfig  "$IFDIR"        done    ;;    esacdone...

This tells us that we can use the values auto, STATIC,
STATIC_FALLBACK, NetworkManager and /sys/class/net/ Interfaces (
with * and ? wildcards ).

The Cause

What it also tells us is that the default auto is translated to
STATIC_FALLBACK NetworkManager.

STATIC_FALLBACK only uses the value in
NETCONFIG_DNS_STATIC_SEARCHLIST if the NetworkManager does not
provide a value.

Excerpts from /etc/netconfig.d/dns-resolver

...if [ $sf -eq 1 -a -z "$DNS_SEARCHLIST" ]; then    DNS_SEARCHLIST="$NETCONFIG_DNS_STATIC_SEARCHLIST"fi...

The Solution

Change the configuration in NETCONFIG_DNS_POLICY from STATIC_FALLBACK
to STATIC

Excerpt from /etc/sysconfig/network/config

NETCONFIG_DNS_POLICY="STATIC NetworkManager"

Et voila! Working hostname search.

Summary

To use a static domain search configure your search :

Excerpt from /etc/sysconfig/network/config

NETCONFIG_DNS_STATIC_SEARCHLIST="my.domain.tld"

And then configure netconfig to keep static configurations even when
oder modules provide the information:

Excerpt from /etc/sysconfig/network/config

NETCONFIG_DNS_POLICY="STATIC NetworkManager"

Create VMware vmdk for dd images

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

This will will create vmdks for dd images from hard drives: You need access (linux) to the machine you created the dd from as you need to run: sfdisk -luS /dev/sdx to obtain the necessary information. The images created by this process are non-growable preallocated and thus take a lot of space without necessity to do so. With the *vmware-vdiskmanager* from vmware server (or ESX) you can create a growable disk. Run `vmware-vdiskmanager -r sdb.dd.vmdk -t 0 sdb.vmdk` After that the Disk still takes all the space. But now you can use the vmware-tools inside the vm to shrink it!

Desktop Wallpapers

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Mike Swanson beautiful Desktop Wallpaper Photographs:

http://blogs.msdn.com/mswanson/articles/wallpaper.aspx

Feed Statistics

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Hi,

I just realized that I didn't knew if there is actually anybody besides
me is reading this stuff. ( You shouldn't. I told you so ;-) ) So I
switched to feedburner for RSS feed tracking.

Shout at me through chris ( the at sign ) wonko.de if this breaks
anything for you.

Getting alerts when Java processes crash

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Apparently the Java runtime has options that can execute commands when a
JVM crashes.

http://prefetch.net/blog/index.php/2008/01/29/getting-alerts-when-java-processes-crash/

Linux Books

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

http://www.linuxhaxor.net/2007/09/05/68-linux-related-free-e-books/

Monitoring Java garbage collection with jstat

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Matty writes how to have a look at what the Java Garbage Collector is
doing:

http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/

More Wallpapers

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

[![][]][]

http://browse.deviantart.com/customization/wallpaper/

[![][]]: http://neozoisite.deviantart.com/art/Rainbow-Bubbles-100210091

Novell Cool Solutions: Automatically Mount USB Hard Drives

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

I wrote this one for [Novell Cool Solutions][]: **Problem:** USB HDDS are not automounted when no GNOME or KDE session is active in SLES/SLED **Solution:** Seen working in: SUSE 10.1, SLES 10, SLED 10 OpenSuse 10.3 (see Update at end of Article) This article describes how to set a fixed mount point for USB Hard Drives and then automatically have them mounted when plugged in. I tend to be a bit detailed (chatty if you must) there is a short version of what you have to on the bottom of the page. Recent SUSE systems rely on udev, hal and DBUS to automatically mount Devices. Unfortunately the actual mount is only done if you are logged in a Gnome (gnome-volume-manager) or KDE session. (see [SLED Release Notes][]) But what if you want your drives to be automounted with another window manager or no X at all? It's actually all there, the only thing missing is a mount point and someone to do the mount. **Here's my scenario:** I've got a Notebook running as a little backup/projects/playingaround-server running SLES 10. The book only has about 40G of internal HDD space I added some USB HDD's to compensate. Since some Services cannot find their data if it is not in the place where they left it (stupid isn't it ;-) I needed the drives to be mounted exactly the same every time they are plugged in, the server is rebooted, etc. To make the mount points for the USB drives persistent i added the following lines to "/etc/fstab": wzxhzdk:0 I chose to identify the partitions on the disk by Label (LABEL=WORK-USB300). USB drives are actually linked to "/dev/sd-something" device entries by udev. But the order in which they appear is not always preserved. Someday udev might decide to use "/dev/sda" for the drive you used to find under "/dev/sdb". I used yast (system-\>Partitioner-\>...) to set the labels of my (ext3) partitions but you could use "e2label" (ext2/3),"reiserfstune -l" or the like for that. I use the "auto" option in my fstab to be able to mount the drives with "mount -a" wich is quite handy. The "hotplug" option is important to be able to boot the system without the usb drives attached. Without the "hotplug" option your system will boot into the rescue console when the drives are not present. The above is pretty low level. For the fancy stuff please "man fstab" and "man mount". So for now whenever i want my drives i plug them in and run "mount -a". Happy?... not quite. I HAVE TO MANUALLY TYPE "mount -a". NO WAY, GRRR. udev, the service doing all sorts of plugging in and out detection, was already so kind to create a "/dev/sd-something" device for our USB HDD. Why shouldn't it be able to ALSO mount them? In /etc/udev/rules.d/ you will find several .rules files. This is what udev does. Whenever it gets an event it runs through those rules and applies them. In case of a USB HDD it the rules in "/etc/udev/rules.d/60-persistent-storage.rules" are the important ones. The rule file numbering may be different. It is used to determine the order of the rules. To automatically run mount -a when a block device (HDD) is added, add a file to the /etc/udev/rules.d/ directory. **99-mount.rules:** wzxhzdk:1 I called the file 99-something to make sure that the "mount" rule is run after the /dev/sd-something device was created. Otherwise the drive could not be there yet. To activate the new rule do an "/etc/init.d/boot.udev restart" (or "rcudev restart" where it exists). To learn more about how to write rules for udev please consult: That's it. **Short Version:** Add your USB drives to "/etc/fstab" using labels to identify the partitions. Use the options "auto" to be able to mount them with "mount -a" and "hotplug" to avoid problems when the drives are disconnected. **Example:** wzxhzdk:2 Create a new rule for udev. Place a new file "99-mount.rules" in "/etc/udev/rules.d/" with the following content: wzxhzdk:3 Run "/etc/init.d/boot.udev restart" to make the rule available. **Update: OpenSuSE 10.3** The *hotplug* option of mount has been replaced by *nofail*. Same result. -\> man mount At boot mount now does care about the fifth (fs\_freq) and sixth (fs\_passno) field in */etc/fstab* when we give the *nofail* option. Thus we must set them to *0*. -\> man fstab The lines from above now look like: wzxhzdk:4 The udev rc-script has been removed. Now udev is started through */etc/init.d/boot.udev*. To reload the rules use */sbin/udevcontrol reload\_rule* -\> man udev, man udevcontrol The article was re-posted at [linux.wordpress.com][] There are some comments.

Oh Why. Or to mdns or not to mdns .local

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

When trying out a SLED 10 Sp2 Configuration which authenticates against
a Windows 2003 R2 ADS I ran into a timeout which A: was very annoying
and B: did prevent me from logging in (winbind timed out).

It seems the cause for it was twofold:
Since I am a good DNS citizen I chose a *.local Name for my testing
Domain. And I did not configure mdns off in /etc/host.conf. I simply
didnt know. (Argh) Now I do. (From this post )

Excerpt from the (5) host.conf manpage:

mdns

Valid values are on and off. If set to on, the resolv+ library treats
the .local top level domain as link-local domain and sends multicast DNS
requests to the multicast address 224.0.0.251 port 5353 instead of
normal DNS requests. If you already use the .local domain in your
nameserver configuration you will have to switch this option off. See
http://www.multicastdns.org for more information on multicast DNS. on
by default.

Progress bar for cp

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

Something that GUI-guys like me miss in some command line essentials:
http://chris-lamb.co.uk/2008/01/24/can-you-get-cp-to-give-a-progress-bar-like-wget/

Reconfigure Network with Yast while running XEN

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

If you run the XEN Kernel of SLES 10 and try to change your lan settings
with Yast it will simply shoo you away:

A XEN network Bridge was detected.Due to renaming of network interfaces by the bridge script, network interfaces should not be configured or restarted.See /usr/share/doc/packages/xen/README.SuSE for details.
Unfortunately the readme does not really tell what to do.

Here is what I do:

switch off the XEN network bridge:

#/etc/xen/scripts/network-bridge stop netdev=eth0

Run yast (do the changes):

#yast2 lan

Switch the bridge back on:

#/etc/xen/scripts/network-bridge start netdev=eth0

This of course does imply that

All VMs are switched off (or they will loose networking)
Your only bridget network is eth0. (default) Use:
#/etc/xen/scripts/network-bridge status
to see how your configuration looks like

Stop that --beep-- annoying --beep-- beeping in --beep-- VMware

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

When you run some OS in VMware (Server/Workstation) it will make use of
the Console/System Ring/Beep. Thats what all OS for PCs since the start
of the Universe have been doing. Some more (Netware) than others.

Unfortunately VMWare completely emulates PC Hardware here. Even more
Unfortunately it does not (In my opinion) do it very good . In some
cases you don't hear the beep at all. But most off the time I get a very
annoying, loud and too long BEEEEP (Timing issue?).

Well switching it off in the Guest is not too hard. But you have to do
it for every VM.

To completely silence the virtual PC-Speaker in all VMs put the
following in /etc/vmware/config:

mks.noBeep = true

/home/username/.vmware/config might also work but I didn't try.
Worked with VMWare Workstation 6 and should for VMware Server 1, dunno
about ESX.

PS. This does not interfere with the virtual Sound Card but only with
the PC-Speaker.

watching tcp traffic with tcpdump over an ssh connection

Wonko — Tue, 08 Sep 2009 14:12:00 +0200

When i tried out Wake on Lan (WoL) i wanted to know if the machine i wanted to start actually receives the WoL Packet. When you ssh into a machine and then try see tcp traffic with tcpdump you have a nice infinitive loop at hand. Your ssh connection generates traffic which will be seen in tcpdump which outputs this which generates ssh traffic which you see in tcpdump ... run tcpdump with a simple filter a la: tcpdump 'port ! 22' and you're happy.

Braaaaiiiiinnsss!!!one!!

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

[][]

http://urbandead.com

[]: http://urbandead.com

Dual Screen Wallpapers

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

http://www.vladstudio.com/duals/

http://www.dualscreenwallpaper.com/

http://pixelgirlpresents.com/desktops.php?cat=dual

http://www.surech.ch/dual-monitor-wallpaper/

http://commons.wikimedia.org/wiki/Commons:Featured_pictures/Places/Panoramas

Gracefully Reboot an Unresponsive Machine

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

Scott Morris of suseblog.com found something i had completely
forgotten about:

Kernel based SysRq which allows you to kill processes, sync/remount
disks and even reboot your box when it becomes unresponsive.

Scott's Article
Wikipedia Entry

How To Install VMware Server On Ubuntu 7.04 (Feisty Fawn)

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

http://www.howtoforge.com/ubuntu_feisty_fawn_vmware_server_howto

Aparently the any-any update is still needet for Ubuntu.
Didn't know that.

Inverse Tetris

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

http://www.warbears.com/missions.php?id=p [![puzzle_mission.png][]][]

[![puzzle_mission.png][]]: http://www.warbears.com/missions.php?id=p
"puzzle_mission.png"

Luggage for the Kids

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

Guess i will need 2 of these for the next Trip.
[][]

http://www.trunki.co.uk/

[]: http://www.wonko.de/wp-content/uploads/2007/09/trunki.png
"Trunki"

OpenSuse 10.3 on a Dell D820

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

My Company gave me a Dell D820 Laptop Movable Desktop
(\~5Kg!!?). It came with XP which of course was wiped instantly. I am
running SLED 10 SP1 for a while but wanted to try all the 10.3 goodness
on it:

Dell D820

CPU: Intel® Core™2 CPU T7400 @ 2.16GHz
RAM: 4GB. Well someone ordered 4GB. The reality is that the Intel
chipset only allowes the OS to use 3.3Gb of it (cat /proc/meminfo :
MemTotal: 3346256 kB)
Graphic: Onboard (Intel 945GM)
Screen 15,4" WUXGA (1920x1200)
Gigabit Lan / Intel PRO Wireless 3945ABG
HDD 160Gb Seagate ST9160821AS

The installation worked like a charm (Used the Box double Layer DVD). No
hiccups or failures. I did install the 64bit version and KDE.

By now all Hardware was detected and is working fine.(Not using the
Modem, so i dot know about that)

The only thing i hat troubles with is the Graphics Card. Sax2 correctly
detected the Intel 945gm and i was able to use the full 1920x1200
resolution. No 3D acceleration though.

With a bit of Googling around i found that maybe the wrong Device driver
was loaded. It said:

Section "Device"  BoardName    "945 GM"BusID        "0:2:0"Driver       "intel"Identifier   "Device[0]"Option       "monitor-LVDS" "Monitor[0]"VendorName   "Intel"EndSection

in xorg.conf.

I simply changed the Driver to be "i810" leaving the rest of the
xorg.conf file untouched. Et voila! 3D acceleration!

removing SVN information from a Working copy

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

Normally you would use the export functionality of svn:

svn export path/to/workingcopy path/to/export

But sometimes Murphy is harsh on you:

svn: This client is too old to work with working copy 'working_copy;
please get a newer Subversion client

A simple method is to remove all .svn Folders from the working copy:

find them:

find -name .svn

kill them:

for i in \$(find -name .svn); do rm -fR \$i ; done

Be aware that rm -fR always is dangerous. So know what you do.

Role Model Howto Video

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

http://www.devilducky.com/media/61063/

Switching off a laptop LCD while in runlevel 3

Wonko — Tue, 08 Sep 2009 14:11:00 +0200

I use a Laptop as a Server (for Power consumtion reasons).

The system of course run in Runlevel 3. But without any X present the
LCD is never put to sleep by the xScreensaver.

To do this manually you can use the vbetools:

vbetools dpms off turns the screen off

vbetools dpms on switches the lights back on