df

View storage status.

df -h

du

View storage status every directories

for i in `ls 3rd`; do du -sh 3rd/$i; done | grep -E 'M|G'

find

Delete .mp3 files in spesific directory.

find my_directory -type f -name "*.mp3" -exec rm -vf {} \;

ls

ls reverse sort.

ls -r

grep

dunno

grep -oP "^(\S+)"

ssh

login with GSSAPIAuthentication & password.

ssh -o GSSAPIAuthentication=yes [email protected] -p 22000