Detailed Articles
Disk Management
List directories from largest to smallest at the top level only. On older system h will not work and you must use k.
du -sh * | sort
Long Running Processes
To write.
Other Useful Commands
MD5
Check if a file is corrupt,
# On Ubuntu md5sum /path/to/file # On Solaris digest -a md5 -v /path/to/file
Tar
To save a directory into a tar file and gunzip. Make sure to use sudo to keep the permissions intact.
# To tar the directory sudo tar -zcvpf tarfile.tar.gz ./folder # To untar and gunzip the file in one command sudo tar -zxvpf tarfile.tar.gz # Encrypting a tar ...
Last
Last searches back through the file /var/log/wtmp (or the file designated by the -f flag) and displays a list of all users logged in (and out) since that file was created.