solved

edit initrd

2010-12-02T01:30:00.001-08:00

If you ever need to edit the initrd file of /boot/ then issue the following commands:

mkdir ~/initrd
zcat boot/initrd-2.6.22.12-0.1-default >~/initrd-2.6.22.12-0.1-default.cpio
cd ~/initrd
cpio -idv <../initrd-2.6.22.12-0.1-default.cpio

The reverse process is doing by this commands:

find . | cpio --quiet -c -o | gzip -9 -n > /boot/imagefile.img

repair cacti database

2010-09-23T10:53:00.001-07:00

issue following command as root:
mysqlcheck --auto-repair --databases cacti

solve envi 4.1 segmentation fault

2010-08-26T11:27:00.000-07:00

If ENVI 4.1 crashes with segmentation fault then find a old libX11.so.6 file from a working
version and copy it to the directory of your choice and specify this path to LD_LIBRARY_PATH:
export LD_LIBRARY_PATH="/usr/local/lib/private_lib"
export LD_PRELOAD_PATH="/usr/local/lib/private_lib"

then start ENVI and...works

untethered jailbreak and unlock for iphone 3GS with new bootrom and firmware 3.1.3

2010-06-29T07:58:00.000-07:00

The iphone 3GS with new bootrom and firmware 3.1.3 can be jailbreaked and unlocked with following tools:

1) jailbreak it with Spirit from this page:
http://www.redmondpie.com/spirit-jailbreak-fix-for-itunes-9.2/
The link to the software you will find here:
http://rapidshare.com/files/403136973/Spirit.Fix.iTunes.9.2.rar.html

2) unlock the phone with ultrasn0w.
Go to Cydia and add the source http://repo666.ultrasn0w.com
Then install ultrasn0w and everything is done.

mount partition of dd image of hard disk

2010-06-24T08:19:00.000-07:00

If you did a backup of a hard disk with the dd command then you stored
everything including the partition table.
If you want to mount one partition of this backup only to a folder then you need to do the following:

1) losetup /dev/loop0 /home/proc/file
2) fdisk -lu /dev/loop0 then you will see the partitions and the number of the blocks where they start. If you want to mount the partition number 3 then read the number there. Let's say it is N
3) losetup -d /dev/loop0 (release the loop device)
4) losetup /dev/loop0 /home/proc/file -o $((N*512))
5) mount /dev/loop0 disk

1 Tb hard disk appears as 33Mbyte disk on a Gigabyte mainboard

2010-05-31T11:32:00.000-07:00

If a 1Tb hard disk that is installed on a Gigabyte motherboard appears to have
a size of 33 Mbyte after some time then do the following:

>hdparm -N /dev/sdc (assuming that the disc appears as /dev/sdc)
/dev/sdc:
max sectors = 1953525168/1953525168, HPA is disabled

write the number that appears behind the slash in the following line:

>hdparm -Np1953525168 /dev/sdc

Then reboot the machine.
The disc has its original size and all data is still there.
Thanks to:

http://www.mail-archive.com/linux-ide@vger.kernel.org/msg16327.html

howto encrypt a directory to a file

2010-02-18T11:51:00.000-08:00

To encrypt a directory input_directory to a encrypted file do the following:

a) generated a file input_directory_file big enough to hold the data. This file will be the
filename of theencrypted file later. To do this you can use the command dd if=/dev/zero
of=input_directory_file bs=1M count=100. This command will generate a file with 100Mb size.
b) losetup /dev/loop0 input_directory_file
c) cryptsetup luksFormat /dev/loop0 (answer with YES and specify the password twice)
d) cryptsetup luksOpen /dev/loop0 containername
e) mke2fs /dev/mapper/containername (to put a filessystem to the device)
f) mkdir container_dirctory
g) mount /dev/mapper/containername container_directory
h) put all the files and directories inside this container_directory
i) umount container_directory
j) cryptsetup luksClose containername
k) losetup -d /dev/loop0

That's all

how to read the database of sleep cycle and how to generate the same plots

2010-01-14T12:22:00.000-08:00

1) copy the file /var/mobile/Applications/sleep cycle/Documents/eventlog.sqlite
to your pc.
2) use sqlitebrowser to open the file and to extract the data:
ZINTENSITY contains the data
ZTIME contains the time
ZSLEEPSESSION contains the session number (number of night)
-> the time is given in seconds since 1.1.1970
-> example: array=dblarr(2,200)
array(0,*)=ZTIME
array(1,*)=ZINTENSITY
3) for plotting:
->subtract the time of the first element from all times (remove the time offset)
array(0,*)=array(0,0)
->generate an empty array with the same number of elements as you have seconds
arind=fltarr(max(array(0,*)))
->put your data to that positions where the time was recorded.
arind(array(0,*))=array(1,*)
-> plot the data with plot,smooth(smooth(smooth(at,1001),1001),1001)

use mouse gestures in fvwm2/suse

2009-12-02T03:32:00.001-08:00

easystroke is a wonderful program that lets you record mouse gestures and executes
commands based on them.
In conjunction with a special definition in .fvwm2rc you can specify any action
to be executed. For example to switch to a special window on the desktop:
in .fvwm2rc:
Key Pause A N FocusWindowNumber 8
-> switches to the window remembered on position 8
PipeRead 'for i in `seq 0 9`; do echo Key $i A MC AssignNumberToCurrentWindow $i; done'
->remembers the window and stores it on position 8

in easystroke define key "Pause" to a gesture of your choice.

If executing that gesture the window 8 is switched to.

tell mplayer which sound device to use

2009-11-18T23:12:00.001-08:00

mplayer -ao oss:/dev/dsp *.mp3
mplayer -ao alsa:device=hw=0.0 *.mp3

or

mplayer -ao oss:/dev/dsp1 *.mp3
mplayer -ao alsa:device=hw=1.0 *.mp3

wacom bamboo stops working after unplugging

2009-11-10T01:05:00.000-08:00

to solve this (to get it working as a graphic tablet again without restarting X) just switch from X11 to Console (press Ctrl + Alt + F1 together then release them) and then switch back to X11 (press Ctrl + Alt + F7 together then release them).
Then the graphic tablet works as before unplugging!

Tethering of iPhone 3GS with 3.1.2 and use it as bluetooth modem in linux

2009-10-27T01:20:00.000-07:00

1) go to Cydia and install "Enable tethering on 3GS..."
2) go to "Setttings->General->Network->Internet Tethering"
and switch tethering on. Press "Turn on Bluetooth"
3) on your linux machine establish a pairing of the iphone with the pc
in SuSe 11.2 you can do this with bluetooth-applet or bluetooth-wizard
4) on your iphone (with Settings->General->About->Bluetooth) or on your pc
(with "sdptool search DUN") find out the MAC address of your iphone's bluetooth
5) on the pc call "pand -c MACADDRESS -n" where MACADDRESS is the MAC address
discovered in step 4) (something like 00:01:02:03:04:05)
6) Set up your network on YaST2: "Network Devices->Network Settings->Add->Device Type=Bluetooth->
Next->Next->Ok
7) adjust your /etc/resolve.conf to contain
nameserver 81.3.216.100
nameserver 194.24.128.100
search 194.24.128.118

that's it.

set up firewall to allow only one ip address

2009-09-11T06:35:00.000-07:00

iptables -F
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -L -v
iptables -A INPUT -s 111.111.111.111 -j ACCEPT # change the IP address as appropriate
iptables-save
rcSuSEfirewall2 restart

do not forget to start firewall automatically

iphone tunnel suite 2.7 does not work any more with iPhoen firmware 3.0

2009-06-27T15:34:00.000-07:00

take i-funbox which is very good: http://www.i-funbox.com/

get information about devices

2009-06-27T09:29:00.000-07:00

To get information about devices attached to a computer run the command:

blkid

tethering

2009-06-24T13:45:00.000-07:00

Follow this steps and you can connect your laptop to the
internet through your iphone

http://help.benm.at/help.php

convert flv to mpg

2009-06-06T10:05:00.000-07:00

ffmpeg -i test.flv -ar 22050 -ab 56 -r 25 -f flv -b 400 -qmin 3 -qmax 6 -s 320x240 test.mpg

convert AVI to DVD format

2009-06-05T00:09:00.000-07:00

1) -> (mencoder -o out.avi -noidx -oac copy -ovc copy ccmovie.avi)
-> ffmpeg -i out.avi -y -target ntsc-dvd -sameq -aspect 16:9 out.mpg
-> dvdauthor --title -o dvd -f out.mpg
-> dvdauthor -o dvd -T
-> mkisofs -dvd-video -o dvd.iso dvd/
-> growisofs -dvd-compat -dvd-video -speed=4 -Z /dev/dvd dvd/*

OR

2) devede

show MAC address

2009-05-13T04:42:00.000-07:00

To see the MAC address of a host in the network do the following:
a) ping host
b) arp -a or arp -a host

2009-04-18T07:47:00.000-07:00

Aufloesung in slant range

sigma(boden)=aufloesung/sin(incidence_angel)

cvs commands

2009-04-16T12:34:00.000-07:00

To restore the contents of any day before the given day use:

chris@korbi:~/workspace/ospdir-twopass> cvs -d /home/cvs update -Pd -r twopass_mocoresampling_pband -D now

for the latest version before 1.4.2009:

chris@korbi:~/workspace/ospdir-twopass> cvs -d /home/cvs update -Pd -r twopass_mocoresampling_pband -D 20090401

shift complex array by applying a ramp in frequency domain

2009-02-11T08:19:00.000-08:00

tam=size(vector)
w=findgen(tam(1))/float(tam(1))
shifted_vector=(fft(fft(vector)*exp(complex(0,-w*s)),/inverse))
s is der shift in pixels

mount iphone in linux via usb

2009-02-04T14:40:00.000-08:00

1) get package ifuse-0.9.5-2.3.i586.rpm
libplist1-1.2-2.1.i586.rpm
usbmuxd-1.0.0-23.2.i586.rpm
libiphone0-0.9.5-4.1.i586.rpm
libusbmuxd1-1.0.0-23.2.i586.rpm

from http://matt.colyer.name/projects/iphone-linux/index.php?title=Main_Page
2) install these packages
3) sudo ifuse --root /mnt/iPhone/ in order to mount root filesystem of the iphone
3) sudo ifuse /mnt/iPhone/ in order to mount user filesystem of the iphone
4) unmount the iphone with sudo fusermount -u /mnt/iPhone

grub

2009-01-14T13:12:00.000-08:00

Error 18: Selected cylinder exceeds maximum supported by BIOS
-> the bios is too old and the kernel is byond the 8 Gbyte limit

Install the grub from rescue disc:
mount /dev/sda? /mnt/sysimage
mount --bind /dev /mnt/sysimage/dev
chroot /mnt/sysimage
grub-install /dev/sda

IF the partitions are as follows:
/dev/sda1 windows
/dev/sda2 extended
/dev/sda5 swap
/dev/sda6 /
/dev/sda7 /home

then you need to set /dev/sda2 as the boot partition with fdisk /dev/sda a 2
in the menu.lst of grub needs to be written: root (hd0,5)

siemens 4000 micro needs SM1

2008-12-29T06:28:00.001-08:00

The siemens telefon 4000 4010 4015 micro needs Slim-Lumberg-SM1
The SM2 is not compatible!

edit initrd image

2008-12-16T22:13:00.000-08:00

1. Rename:
mv initrd.img initrd.img.gz
2, Uncompress:
gzip -d initrd.img.gz
3. Extract: (WARNING!! without "--no-absolute-filenames" extracts in your root "/")
mkdir root
cd root
cpio -i --no-absolute-filenames < ../initrd.img
4. Do the editing
5. New archive:
find . | cpio -o -H newc > ../initrd_new.img
6. Compress:
cd ../
gzip -c initrd_new.img > initrd_new.img.gz
7. Rename:
mv initrd_new.img.gz to initrd.img

howto repair the MBR in linux

2008-12-01T00:49:00.002-08:00

1. Pop in the Live CD, boot from it until you reach the desktop.
2. Open a terminal window or switch to a tty.
3. Type "grub"
4. Type "root (hd0,6)", or whatever your harddisk + boot partition numbers are (my /boot is at /dev/sda7, which translates to hd0,6 for grub).
5. Type "setup (hd0)", ot whatever your harddisk nr is.
6. Quit grub by typing "quit".
7. Reboot.

keyboard writes just with capital letters

2008-11-30T23:24:00.000-08:00

xmodmap -e 'add Lock = Caps_Lock'
and then press shift and caps_lock

raid tools

2008-11-06T06:10:00.000-08:00

To add a device /dev/sdc1 to the raid md0 after failure use

mdadm /dev/md0 --add /dev/sdc1

add device to raid

2008-10-27T13:06:00.000-07:00

To create a RAID10 do the following
mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sda /dev/sdb /dev/sdc /dev/sdd

to insert a new hard disc by replacing a broken one do
mdadm --manage /dev/md?? --add /dev/newpartition

to monitor your RAID and to send an email if a disc fails:
mdadm --monitor --scan --mail=office@wimmer-christian.de

Midnight Commander shows strange characters

2008-09-27T06:03:00.001-07:00

If mc shows strange characters (lines are not drawn, ...) then the shell variable
LANG is not set correctly.
You can change the LANG variable permanently to be en_US.ISO-8859-1 like

echo "export LANG=en_US.ISO-8859-1" | sudo tee -a /etc/bash.bashrc

or just for the mc :

echo "alias mc='export LANG=en_US; mc'" | sudo tee -a /etc/bash.bashrc

Both worked for me.

error message when compiling v4l-dvb-experimental

2008-06-26T23:45:00.000-07:00

if you get an error message like usage_count... then just comment this lines in that files.

tvtime, kwintv, xawtv no sound

2008-06-26T23:44:00.000-07:00

Execute this line after you started the application. Maybe you need to do this as root

sox -w -r 32000 -t ossdsp /dev/dsp3 -t ossdsp /dev/dsp

please adjust /dev/dscp3 and /dev/dsp to your needs.

xawtv liefert X Error of failed request: XF86DGANoDirectVideoMode

2008-06-26T12:46:00.001-07:00

xawtv -c /dev/video -remote -global:filter "linear bend"

printing DHL postage stamp

2008-06-25T00:07:00.000-07:00

If you want to make a test print with acroread (i.e. to print a DHL postage stamp)
and you get the error message "lp: The printer or class was not found"
then set up the default printer to have the name "undefined".
You can do this via hp-setup -a. Only if it looks like this:
linux>lpq
undefined is ready
no entries
linux>

then you can print.

encryption

2008-06-09T07:09:00.000-07:00

-> /etc/init.d/boot.crypto start to start the encryption daemon
-> give the passwords
-> dmsetup ls
shows the encrypted devices
-> mount "device" "directory"
mounts the "device" to the "directory"
-> cryptsetup remove "device"
removes the link and after this it can not be mounted again.

by hand procedure

losetup /dev/loop0 soft_08062008 (soft_08062008 is a file)
cryptsetup luksOpen /dev/loop0 softcont (softcont is any name)
mount /dev/mapper/softcont softcontainer (softcontainer is the directory where the data will be mounted)

Attention:
cryptsetup luksFormat /dev/loop0 will format the file
cryptsetup luksClose softcont will detach the mapping

IDL shows inverted images after use of DEFROI

2008-05-30T06:35:00.000-07:00

In case that the display of images is inverted every time you show it, it is very likely
that one system variable was changed.
Please try to set

IDL>device, set_graphics_function=3

This happens most likely if you type CTRL-C within the program DEFROI

vmware stops ctrl and shift key from working

2008-05-06T22:54:00.000-07:00

If you encounter that vmware stops ctrl and shift keys from working in linux then do not panic!

The solution is to run setxkbmap in a shell.
This command brings back the shift and ctrl keys.

automatic ssh login to remote without a password

2008-04-18T00:04:00.002-07:00

If you wish to login to a remote machine without giving the password every time, use following sequence:

1) generate on your LOCAL machine a key pair with: ssh-keygen -t rsa (don't type in any password, just keep hitting enter)
2)file transfer the (local) PUBLIC key ~/.ssh/id_rsa.pub to the machine you which to automatically login to and append it to the (remote) file ~/.ssh/authorized_keys on your remote machine
3)make sure the (remote) authorized_keys is not read or modifiable by group or others my doing (remote) chmod 700 ~/.ssh/authorized_keys
4)make sure the ~/.ssh directory on the REMOTE machine is not read or modifiable by group or others my doing (remote) chmod 700 ~/.ssh
5)You may need to enable empty password authentication (need root access) on the REMOTE machine in the config file sshd_config. Make "permitemptypasswords yes". Restart SSH Daemon on REMOTE.

That's it

If you still can not log in without password then check the priorities of your home directory.
You can as well change temporarily in the file /etc/ssh/sshd_config
If this does not help, change the following option on the remote sshd config:

#LogLevel INFO
to
LogLevel DEBUG

...and of course restart the sshd daemon.
Then you see why it is still not working in the /var/log/messages file.

automatic ssh login to remote without a password

2008-04-18T00:04:00.001-07:00

no copy/paste between vncviewer and shell

2008-01-29T10:26:00.000-08:00

In case that there is no copy/paste functionality between a vnc session and
your linux shell then check the if the following command is running on the
computer where the vncserver is running:
>vncconfig -display :? -iconic -nowin &
the ? has to be replaced with the display of the vncsession.
It is handy to store this line already in the ~/.vnc/xstartup script

fglrx:firegl_init_module ERROR firegl_stub_register failed

2007-08-24T05:54:00.000-07:00

If you get this error message while inserting the module fglrx then just unload
the modules radeon and drm. This solves the problem

ssh login takes much time

2007-04-19T05:25:00.000-07:00

If the ssh login to a machine needs much time (more than 10 seconds) then put the line
UseDNS no to the sshd_config on the machine you want to connect to and restart the daemon.

If it is still slow then check if the /etc/hosts file contains the proc that you were about to connect from.
The point is that you do not only need to resolve the name of the proc that you want to connect to but also the name of the proc you connect from.

This really works and the login time should be below one second.

disk partitioning

2007-03-14T01:59:00.000-07:00

I am looking for a tool to extend the disc space of my filesystem without loosing the data that is already there.
Operating system: linux
filesystem: ext2/ ext3/ reiserfs

google-earth server connection problem

2007-03-08T06:21:00.000-08:00

Google earth hangs when connecting to the server:
If you encounter a problem with google earth so that it can not connect to the server
and if it exits with a error code:29 then check the proxy settings.
I had this problem where google earth could not connect but all other browsers
could. I had to edit the file /etc/proxy (on SUSE 10.2) and manually switch off the proxy settings.

solved

edit initrd

repair cacti database

solve envi 4.1 segmentation fault

untethered jailbreak and unlock for iphone 3GS with new bootrom and firmware 3.1.3

mount partition of dd image of hard disk

1 Tb hard disk appears as 33Mbyte disk on a Gigabyte mainboard

howto encrypt a directory to a file

how to read the database of sleep cycle and how to generate the same plots

use mouse gestures in fvwm2/suse

tell mplayer which sound device to use

wacom bamboo stops working after unplugging

Tethering of iPhone 3GS with 3.1.2 and use it as bluetooth modem in linux

set up firewall to allow only one ip address

iphone tunnel suite 2.7 does not work any more with iPhoen firmware 3.0

get information about devices

tethering

convert flv to mpg

convert AVI to DVD format

show MAC address

cvs commands

shift complex array by applying a ramp in frequency domain

mount iphone in linux via usb

grub

siemens 4000 micro needs SM1

edit initrd image

howto repair the MBR in linux

keyboard writes just with capital letters

raid tools

add device to raid

Midnight Commander shows strange characters

error message when compiling v4l-dvb-experimental

tvtime, kwintv, xawtv no sound

xawtv liefert X Error of failed request: XF86DGANoDirectVideoMode

printing DHL postage stamp

encryption

IDL shows inverted images after use of DEFROI

vmware stops ctrl and shift key from working

automatic ssh login to remote without a password

automatic ssh login to remote without a password

no copy/paste between vncviewer and shell

fglrx:firegl_init_module *ERROR* firegl_stub_register failed

ssh login takes much time

disk partitioning

google-earth server connection problem

fglrx:firegl_init_module ERROR firegl_stub_register failed