[Note: This command needs to be run as root].

If you are downloading something large at night, you can start wget as a normal user and issue the above command as root. When the download is done, the computer will automatically go to sleep. If at any time you feel the computer should not go to sleep automatically(like if you find the download still continuing in the morning), just create an empty file called nosleep in /tmp directory.

Does not require input to function or complete. Number of iterations controlled by shell variable $NUM.

This is really not cli but I think it's neat.

Put this in your ~/.bashrc file (or the equivalent)

If you use vim a lot, this alias will be immediately obvious. Your brain will thank you.

If you are in ex mode in vim i.e. you've pressed ':'. You can edit the current command by pressing <ctrl-f>

If you still connect to your wireless access point manually and need to use wpa_supplicant, the above fu will grep all of the known SSID from your wpa_supplicant.conf file, present it in a Zenity list and return the SSID name you choose. I've wrapped this command in to a bash script that then up's the interface, associates and autenticates. Saves me from using NetworkManager ;)

A dear friend of mine asked me how do I copy a DVD to your hard drive? If you want to make a copy of the ISO image that was burned to a CD or DVD, insert that medium into your CD/DVD drive and (assuming /dev/cdrom is associated with your computer?s CD drive) type the following command

This command clone the first partition of the primary master IDE drive to the second partition

of the primary slave IDE drive (!!! back up all data before trying anything like this !!!)

When you need to add another tty device that can automatically start at boot time

Rainbow, instead of greys

Updates your Ping.fm status and websites supported by ping.fm (like twitter, facebook, and google talk).

A very simple command to send a signed and encrypted message from the command line using GPG Keys

With this one liner you can easily output a standard help message using the following convention:

Usage: is the start marker

Stop at the last #

Converts all ogg files to mp3 files in the current directory.

Using OpenSSL we can encrypt any input we wish and then use Netcat to create a socket which can be connected to from an externally source (even using a Web Browser)

This will diff your local version of the file with the latest version in svn. I put this in a shell function like so:

Put the positive clauses after the '-o' option.

Manages everything through one sed script instead of pipes of greps and awks. Quoting of shell variables is generally easier within a sed script.

THIS COMMAND IS DESTRUCTIVE. That said, lets assume you want to render your boot drive unbootable and reboot your machine. Maybe you want it to boot off the network and kickstart from a boot server for a fresh OS install. Replace /dev/fd0 with the device name of your boot drive and this DESTRUCTIVE command will render your drive unbootable. Your BIOS boot priority should be set to boot from HD first, then LAN.

I wanted to keep a backup of my company database server on my local homeserver. After I found maatkit to sync databases, everything except security seemed fine. SSH takes care of that part.