Bash

Browse all articles, tutorials, and guides about Bash

About Bash

Explore Bash scripting to automate everyday tasks. Learn command-line techniques, shell utilities, and tips for building robust scripts.

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Bash
2024-11-15|8 min read

How to Check if a Variable is Set in Bash

Learn multiple methods to check if variables are set, unset, empty, or have specific values in Bash scripts with practical examples and best practices.

Bash
2024-11-05|8 min read

How to Check if a String Contains a Substring in Bash

Learn multiple methods to check for substring presence in Bash, including pattern matching, case-insensitive searches, and practical examples for string validation.

Bash
2024-10-22|7 min read

How to Concatenate String Variables in Bash

Learn multiple ways to combine string variables in Bash scripts, from simple concatenation to complex string operations with practical examples.

Bash
2024-10-01|7 min read

How to Set a Variable to the Output of a Command in Bash

Learn multiple methods to capture command output in Bash variables using command substitution, including best practices and error handling techniques.

Bash
2024-07-08|6 min read

How to Check if a File Does Not Exist in Bash

Learn various methods to test for file non-existence in Bash scripts, including proper error handling, permission checks, and practical automation examples.

Bash
2024-07-08|7 min read

How to Extract Filename and Extension in Bash

Learn multiple methods to extract filenames, extensions, and directory paths from file paths in Bash using parameter expansion and basename commands.

Bash
2024-06-12|8 min read

How to Split a String on a Delimiter in Bash

Learn multiple methods to split strings using delimiters in Bash, including IFS, parameter expansion, and array techniques with practical examples.

Bash
2024-05-03|6 min read

How to Redirect and Append Both stdout and stderr to a File in Bash

Learn different methods to capture both standard output and error streams in Bash, including appending to files and separating streams for better logging.

Bash
2024-05-03|7 min read

How to Check if a Program Exists from a Bash Script

Learn multiple reliable methods to check if a command or program is available on your system from within Bash scripts, including using which, command, and type.

Bash
2024-04-18|8 min read

What Does "2>&1" Mean in Linux and Bash?

Learn what the 2>&1 redirection operator means in Linux commands, how it works with standard output and error streams, and when to use it effectively.

Bash
2024-04-12|7 min read

How to Count Lines of Code in a Directory Recursively

Discover multiple methods to count source code lines across entire directory trees, including filtering by file types and excluding specific directories.

Bash
2024-03-15|7 min read

How to Get the Directory Where a Bash Script is Located

Learn multiple reliable methods to determine the directory path of your Bash script from within the script itself, including handling symbolic links and edge cases.

Bash
2024-03-08|5 min read

How to Iterate Over a Range of Numbers in Bash Using Variables

Learn different methods to loop through number ranges defined by variables in Bash, from simple for loops to advanced sequence generation techniques.

Bash
2024-02-15|4 min read

How to Reload .bashrc Settings Without Logging Out

Need to apply changes to your .bashrc file immediately? Learn multiple methods to reload your Bash configuration without restarting your terminal session.

Bash
2024-01-22|6 min read

Looping Through File Content Line by Line in Bash

Learn multiple techniques to read and process file content line by line in Bash scripts, including handling special characters and preserving whitespace.