This is my little spot to keep notes for things I need to remember and maybe others would like to remember.

Backup/Restore applications on a Debian based system

Backup:

dpkg --get-selections > selections.txt

Restore:

dpkg --set-selections < selections.txt
dselect update
apt-get dselect-upgrade

Tar over SSH

tar xcvf user@host dir/foo.tar.gz

Mount remote directory via SSH

Mount:

sshfs hostname:/remotedir localdir/

Unmount:

fusermount -u localdir/

Remap Kensington Slim Type keyboard \ to Alt

xmodmap -e "keycode 94 = Alt_L

Get your external IP address

curl --silent whatismyip.com/automation/n09230945.asp | awk '{print $1}'

WebKit by default in Konqueror

keditfiletype text/html

Go to the Embedded tab and move the WebKit part up to the top.

Qemu

Create a disk image (static size) or a qcow image (dynamic size):

Disk Image (static size):

qemu-img create foo.img 2G

QCow Image (dynamic size):

qemu-img create -f qcow foo.qcow 2G

Start installation from ISO:

If you created a static size disk image above:

qemu -cdrom foo.iso -hda foo.img -boot d

If you created a dynamic size QCow image above:

qemu -cdrom foo.iso -hda foo.qcow -boot d

Boot installation with 512M of memory:

If you created a static size disk image above:

qemu -m 512 -hda foo.img

If you created a dynamic size QCow image above:

qemu -m 512 -hda foo.qcow