Commands by GenierO (0)

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ubuntu easter eggs

Remove all unused kernels with apt-get
This will remove all installed kernels on your debian based install, except the one you're currently using. From: http://tuxtweaks.com/2009/12/remove-old-kernels-in-ubuntu/comment-page-1/#comment-1590

Remount root in read-write mode.
Saved my day, when my harddrive got stuck in read-only mode.

Query wikipedia over DNS

Create a 100MB file for testing transfer speed

Create a listing of all possible permissions and their octal representation.

lists files and folders in a folder
lists files and folders in a folder with summary.

Search command history on bash
Very handy and time-saving. Do a 'ctrl+ r' on command prompt. You will see a "(reverse-i-search)`':" mark. Just type any sub-string of the command you want to search(provided you have used it sometime in the same session). Keep on searching by repeatedly pressing ctrl+r. Press enter once you get the desired command string.

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"

Find the package that installed a command


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