Commands using bc (52)

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connect to X login screen via vnc
the $15 may change for you depending on your distro, etc...

Show the last 20 sessions logged on the machine
change 20 by the number of sessions you want to know (20 it's fair enough)

Delete more than one month old thumbnails from home directory
By time thumbnail images in ~/thumbnails take up too much space, this command will help deleting old ones. Find options explained: -type f : find files only, not directories -atime +30 : last accessed more than 30 days ago

download 10 random wallpapers from google
you may want &hl=en for &hl=es for the language you may want imgsz=xxlarge for imgsz=large or whatever filter you may want q=apples or whatever

Cleanup firefox's database.
For Mac OS X users only

Backup with versioning
Apart from an exact copy of your recent contents, also keep all earlier versions of files and folders that were modified or deleted. Inspired by the excellent EVACopy http://evacopy.sourceforge.net

Start a SOCKS proxy to avoid a restrictive firewall
You may go to Internet by means of your home ssh server. You must configure your local proxy to send traffic through the proxy. Many programs allows that: firefox, pidgin, skype, gnome, etc. Your home ssh server must listen in any of the ports permitted by your enterprise firewall. That usually includes 80 and 443.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

create a progress bar...
A simple way yo do a progress bar like wget.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.


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