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Querying a specific name server using dig

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

Read 20 AUG 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.

Read 28 FEB 2014

A more powerful version of grep

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

Read 31 JAN 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).

Read 5 DEC 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.

Read 27 NOV 2013

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