...

How can I determine the size of a directory or folder in Linux?

du -hs /path/to/directory -h: human-readable -s: summary (don't show size of each individual file within the...

...

Tutorial: How to use Linux Screen

A problem that often arises when you’re dealing with lots of data is that it takes forever to process. So you SSH into your Amazon EC2 machine,...

...

How to password-protect a PDF file on Ubuntu

In a terminal, type: sudo apt-get install pdftk Then, to add a password to a PDF file, type: pdftk <input-file> output...