First look into /etc/modules if you have unionfs (or squashfs) support. If not, add the modules. UnionFS combines two filesystems. If there is a need to write a file, /tmp/unioncache will be used to write files (first create that directory). Reads will be done where the file is found first.

http://tldp.org/HOWTO/SquashFS-HOWTO/creatingandusing.html

use the locate command to find files on the system and verify they exist (-e) then display each one in full details.

show file withou duplicated lines

Copies a dir structure without the files in it.

Replace 60 with the number of minutes until you want the machine to shut down.

Alternatively give an absolute time in the format hh:mm (shutdown -h 9:30)

Or shutdown right away (shutdown -h now)

man nautilus (1) - the GNOME File Manager

OPTIONS

-q

--quit

Quit Nautilus.

ps But if it hang up, you should kill it with -9 of couse

cp options:

-p will preserve the file mode, ownership, and timestamps

-r will copy files recursively

also, if you want to keep symlinks in addition to the above: use the -a/--archive option

This will download a Youtube playlist and mostly anything http://code.google.com/apis/youtube/2.0/reference.html#Video_Feeds

The files will be saved by $id.flv

It's the same like 'cp -p' if available. It's faster over networks than scp. If you have to copy gigs of data you could also use netcat and the tar -z option in conjunction -- on the receiving end do:

# nc -l 7000 | tar -xzvpf -

...and on the sending end do:

# tar -czf - * | nc otherhost 7000

This will allow you to watch as matches occur in real-time. To filter out only ACCEPT, DROP, LOG..etc, then run the following command: watch 'iptables -nvL | grep -v "0 0" && grep "ACCEPT"' The -v is used to do an inverted filter. ie. NOT "0 0"

It only works in zsh

Sqlite database keeps collecting cruft as time passes, which can be cleaned by the 'vacuum;' command. This command cleans up the cruft in all sqlite files relating to the user you have logged in as. This command has to be run when firefox is not running, or it will exit displaying the pid of the firefox running.

List files and sizes

Reverse DNS lookups, from a file with list of IP's, here the file is called lookups.txt

Ping sweep without NMAP

DNS cache snooping

Show account security settings

"cut" the user names from /etc/passwd and then running a loop over them.

You can also use, $ find . -depth -type d -exec rmdir {} \; 2>/dev/null