How to repeat a character ‘n’ times in Bash
Let us say you want to repeat a character such as ‘-‘ OR ‘=‘ multiple times while writing bash script. Please note that I needed a quick script to work …
How to Use Break and Continue Statements in Shell Scripts
In this article, we will take a look at how to use a break and continue in bash scripts. In bash, we have three main loop constructs (for, while, until). …
How to Use until Loop in Your Shell Scripts
In bash for, while, and until are three loop constructs. While each loop differs syntactically and functionally their purpose is to iterate over a block of code when a certain …
Different Ways to Read File in Bash Script Using While Loop
This article is all about how to read files in bash scripts using a while loop. Reading a file is a common operation in programming. You should be familiar with …
How to Use Heredoc in Shell Scripting
Here document (Heredoc) is an input or file stream literal that is treated as a special block of code. This block of code will be passed to a command for …
How to check if file does not exist in Bash
Author: Vivek Gite Last updated: February 27, 2021 Like
Learn Difference Between Sourcing and Forking in Bash
The main focus of this article is to clearly understand what happens when you run the script vs source the script in bash. First, we will clearly understand how the …
Learn Difference Between $$ and $BASHPID in Bash
Recently I was working on a shell script and I saw a significant difference in how bash special variable $ and BASHPID behaves. Every process running in Linux will be …
How to check if bash variable defined in script
I need to set a bash environment variable called PURGEIMAGE and take specific actions in my script. For example, if PURGEIMAGE set, then purge images from CDN else just URL. …
How to force awk not to print a newline
I have two columns (fields) in my text file. I am trying to insert ‘|‘ between two and create an HTML table based upon the updated file. My sample input …