Show apps that use internet connection at the moment.
lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2
Resize SVG to PNG and maintain transparent background:
convert -resize 24x24 -background none source.svg output.png
Remove pacman orphaned package:
pacman -Rs $(pacman -Qtdq)
Extract lines containing SEARCHSTRING from filename:
grep 'SEARCHSTRING' filename
Extract lines containing not SEARCHSTRING from filename:
grep -v 'SEARCHSTRING' filename
Return filenames:
grep -l 'SEARCHSTRING' *.xml
Pacman update then shutdown
pacman -Syu | shutdown -h now
Backup
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
List files installed by package
pacman -Ql package
Replace all %20 in a filename
rename -n 's/%20/_/g' *