If your shutdown/logout window in KDE4 is invisible ...

Try to change fonts: System Settings -> Appearance -> Fonts
and then ADjust all fonts, check fonts, select Dejavu Sans.
And it should fix the problem,

Modifying grub

1. Goto to /etc/default/grub
2. sudo nano /etc/default/grub
3. sudo update-grub
4. GRUB_DEFAULT=”Ubuntu, with Linux 2.6.31-21-generic”
5. It will update /boot/grub blah blah
   

I upgraded to Kubuntu 10.4 Lucid

I had problems with

1. wireless network - see lspci, dmesg, /var/log/syslog; I uninstalled network-manager and installed wicd. It helped. I can have at university my wireless network. but still I don't have at home.
2. I have problems with my big Dell 2407WFPb screen at school on the newest kernel 2.32-21. I have to use 2.31.

Removing running plasmoids in KDE4

The symptom: I can see running plasmoids in the 'running' but I have no way to remove it.

The solution is: go to your home directory (after logging out, in the command line) ;and then:
.kde/share/config/

Look in plasmarc files but more probably in plasma-desktop-appletsrc and remove those plasmoids from this file. Now login to your kde session and they should be no anymore in the running plasmoids.

Changing resolution

http://www.ubuntugeek.com/how-change-display-resolution-settings-using-xrandr.html

Ripping audio books

1. take audio track from the cd
2. use k3b:
optionally: sudo cdparanoia -B
This will rip your audiobook CD, into the current directory, splitting each track into it's own WAV file.

Read more: http://www.brighthub.com/computing/linux/articles/41095.aspx#ixzz0d1TIm0K2
3. lame -b 64 input-file.wav output-file.mp3
or lame --preset voice input-file.wav output-file.mp3

if you have multiple mp3. mp3wrap output-file.mp3 *.mp3

Changing iso files

from:

http://forums.fedoraforum.org/archive/index.php/t-16524.html

I usually mount the ISO, then copy the contents out with something like:

mkdir ~/mynewcd
mount -o loop ~/crappyoldcd.iso /mnt/iso
cd /mnt/iso
tar cf - . | (cd ~/mynewcd; tar xvfp -)

then unmount the ISO, change the files in ~/mynewcd and run mkisofs with
something like:

cd ~/mynewcd
mkisofs -J -R -v -T -o ../mynewcd.iso -b isolinux/isolinux.bin -c
isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table .

That's assuming you have a bootable CD using ISOLINUX. Also, running something
like:

isodebug ~/crappyoldcd.iso

might give you a good starting point command line for mkisofs...

Hope this helps...
Martin