find ./ -iname "*.mp3" -execdir mp3gain -a -p {} +
for i in *.wav; do lame -m j -b 128 -h "$i" "`basename "$i" .wav`".mp3; done
for file in *.aiff; do ffmpeg -i $file -f mp3 -ab 192k -ar 44100 ${file%.aiff}.mp3; done
find . -type f -name *.php -exec grep -l -i suchtext '{}' \;
groupadd -g gid groupname
useradd -g gid -u uid -s /sbin/nologin username
passwd username