The diff command can be your best friend when you’re troubleshooting problems on a Unix system, but are you using it effectively as you could? The Unix diff command is very handy, but it can do a lot ...

Every now and then I come across a feature of some Linux command that works so well that I have trouble understanding how I managed without it for so long. The one that I most recently discovered is ...

I use the Linux command line daily, but that's because I learned Linux the hard way and those old lessons stuck. Most users could go their entire Linux lifetime and never run a single command. Some ...

For many users who get started with the command line in Linux, there’s a good chance they’re using Bourne Again Shell, or Bash. Bash is the default shell on Mac OS X, and Windows users can use Bash ...

The Linux command line is a text interface to your computer. Also known as shell, terminal, console, command prompts and many others, is a computer program intended to interpret commands. Allows users ...

I have the following bash script which tests 2 jpgs and displays a message if they are different.<br><br> diff -a --brief fullsize.jpg fullsize.jpg.bak<br> echo "diff=$?"<br> if [ $? -eq 1 ]; then<br> ...