====== Commandline-fu ======

Show apps that use internet connection at the moment. 
<code bash>lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2</code>

Resize SVG to PNG and maintain transparent background:
<code bash>convert -resize 24x24 -background none source.svg output.png</code>

Remove pacman orphaned package:
<code bash>pacman -Rs $(pacman -Qtdq)</code>

Extract lines containing SEARCHSTRING from filename:
<code bash>grep 'SEARCHSTRING' filename</code>

Extract lines containing not SEARCHSTRING from filename:
<code bash>grep -v 'SEARCHSTRING' filename</code>

Return filenames:
<code bash>grep -l 'SEARCHSTRING' *.xml</code>

Pacman update then shutdown
<code bash>pacman -Syu | shutdown -h now</code>

Backup
<code bash>sudo tar -cv --one-file-system --exclude=/home/* --exclude=/dev/* --exclude=/proc/* --exclude=/sys/* -f /home/system-backup.tar /* && sudo chown `whoami`:`whoami` /home/system-backup.tar</code>
List files installed by package
<code bash>pacman -Ql package</code>

Replace all %20 in a filename
<code bash>rename -n 's/%20/_/g' *</code>