Sudo lets you run any terminal command as another user — hence "substitute user" — but the default and most common use for it ...

Commands that provide help are essential. Here's a look at some of the help you can get from the Linux system itself. Even after you’ve used Linux for a while, you will still find yourself needing ...

I recently thought about writing a Groovy script to search JARs for a specific string, but decided to first look for an alternative rather than writing a script. The alternative needed to be easy to ...

Linux might sound scary for first-time Linux users, but actually, it isn’t. Linux is a bunch of open-source Unix operating systems based on Linux Kernel. These operating systems are called Linux ...

Working on the command line is an integral part of being a successful Linux user. You need to have a firm grasp of certain commands to work effectively. There are even certain commands that you must ...

Much to the chagrin of those who would like to malign the Linux operating system, it's actually quite easy to use. Thanks to modern GUI desktop environments and applications, anyone can jump into the ...

The awk command can make it easy to remove duplicate characters from a string even when those characters aren’t sequential, especially when the process is turned into a script. First, the awk command ...

Imagine that you want to output multiple lines of text in Bash, or any shell script. Maybe it’s for a help string for a particularly convoluted shell script you’re writing. You could have a separate ...