Jack Wallen shows how you can create a Linux shell script that requires a password without having to save a password within the script. Image: dennizn/Adobe Stock ...

Simply put, a Shell Script is a program that is run by a UNIX/Linux shell. It is a file that contains a series of commands which are executed sequentially as if they were entered on the command line ...

Each Linux command returns an exit code, with 0 indicating success and non-zero values indicating failure. You can use the $? variable to access the exit code and control program flow in scripts. Be ...

If you're new to Linux and the terminal, I can appreciate how difficult it is to learn. Learning Linux was not an easy task.

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 ...

One of the most powerful features of Unix and Linux is that using traditional command line tools, everything is a stream of bytes. Granted, modern software has blurred this a bit, but at the command ...

Last time, I talked about what's known informally as l33t-speak, a series of letter and letter-pair substitutions that marks the jargon of the hacker elite (or some subset of hacker elite, because I'm ...

A file of executable commands for Unix and Linux. Created in a text editor, when the file is run, each command is executed until the end of the file is reached. After the shell script is written, it ...

To change a password in Linux through a Bash script, he two scripts that are most important are 'Create Users' and 'Change Passwords Shell' scripts, for the system admin which regularly uses the mail ...

If you don't love the shell you're using on your Linux system, change it! There are plenty, including bash, fish, ksh, tcsh, zsh. There are quite a few shells on Linux system and more that can be ...