How to Test Shell Script Inputs
To ensure that scripts are not easily derailed by unexpected conditions, it is good practice for script authors to not …
Shell Scripting
How to Use Exit Codes in Shell Scripts
Every command returns an exit status, also commonly referred to as return status or exit code. A successful command …
How to Use Positional Parameters in Bash Scripts
While user-defined variables provide a means for script authors to create containers to store values used by a script, …
Beginners Guide to Writing Bash Shell Scripts in Linux
Many simple day-to-day system administration tasks can be accomplished by the numerous Linux command-line tools …
How to Debug the Shell Scripts in Linux
Inevitably, administrators who write, use, or maintain shell scripts will encounter bugs with a script. Bugs are …
How to Iterate With Bash "For" Loop
System administrators often encounter repetitive tasks in their day-to-day activities. Repetitive tasks can take the …
How to Use Variable in Bash Scripts
As the complexity of a shell script increases, it is often helpful to make use of variables. A variable serves as a …
Understanding Bash Shell Expansion - Command Substitution and Arithmetic Expansion
Aside from variable expansion, the Bash shell offers several other types of shell expansion features. Of these, command …