creates a compressed tar archive of files in /path/foo and writes to a timestamped filename in /path.

Use tar command for a backup info with a date of creation

alias ps?='psg' for maximum hawtness. Works in bash or zsh.

Shell timeout variables (TMOUT) can be very liberal about what is classified as 'activity', like having an editor open. This command string will terminate the login shell for an user with more than a day's idle time.

From there, just pkg install the package you need.

This finds all the PowerPC apps recognized by OS X.

A better version is:

system_profiler SPApplicationsDataType 2> /dev/null | perl -

wnl -e '$i=$j=$k=$p=0; @al=; [email protected]; while($j

s[$i].=$al[$j]; $i++ if ($al[$j]) =~ /^\s\s\s\s\S.*:$/; $j++} while($k

owerPC applications\n\n"'

but that is more than 255 characters...

Lists out all classes used in all *.html files in the currect directory. usefull for checking if you have left out any style definitions, or accidentally given a different name than you intended. ( I have an ugly habit of accidentally substituting camelCase instead of using under_scores: i would name soemthing counterBox instead of counter_box)

WARNING: assumes you give classnames in between double quotes, and that you apply only one class per element.

This is the way how you can find header and cpp files in the same time.

[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