Querying a specific name server using dig

A practical tip on how to avoid cached results when looking up DNS records.

Aug 20, 2014

Adding a user to the sudoers list in Ubuntu

Stop using root for administrative tasks. Here is how to add a new user to the sudoers list in Ubuntu.

Feb 28, 2014

A more powerful version of grep

The utility command grep has a more powerful brother that let us use POSIX Extended Regular Expressions.

Jan 31, 2014

Display disk usage with the du command

How to display the total of the current directory or a particular directory, as well as listing subtotals (subdirectories).

Dec 5, 2013

Hide the desktop icons on Mac OS X

A two step way using the defaults command to hide the icons from the desktop in Mac OS X.

Nov 27, 2013
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