Bash
Bash scripting, shell fundamentals, automation patterns, and common pitfalls.
pushd and popd Commands in Linux: Navigate Directories with a Stack
The pushd and popd commands let you save directories to a stack and jump between them instantly. This guide covers syntax, the dirs command, stack rotation, and practical workflow examples.
Bash printf Command
A practical guide to printf in Bash: formatting numbers, strings, and alignment.
Bash read Command
The Bash read command reads a line from standard input and splits it into variables. This guide covers IFS, prompts, silent input, timeouts, arrays, file reading, and practical script examples.
Bash Range: Sequence Expression Syntax and Examples
The Bash sequence expression generates a range of integers or characters using {START..END} syntax. This guide covers step increments, zero-padding, for loop usage, and how to handle variable ranges with seq.
Bash Comments: Single-Line, Multiline, and Best Practices
Learn how to comment in Bash scripts with single-line, inline, and multiline comment patterns. Includes block comment workarounds and best practices for readable shell scripts.
Bash until Loop
Repeat commands until a condition becomes true with the Bash until loop. Includes syntax, practical examples, and comparisons with the while loop.
pwd Command in Linux: Print the Current Working Directory
The pwd command prints the current working directory in Linux. This guide covers pwd syntax, the -L and -P options, the $PWD variable, and how symlinks affect the output.
Bash For Loop: Syntax and Examples
A complete guide to the Bash for loop: standard syntax, C-style loops, arrays, ranges, break and continue, and real-world scripting examples.
How to Increment and Decrement a Variable in Bash: Counter Examples
Bash provides several ways to increment and decrement a counter variable in scripts. This guide covers the +/- operators, += and -= assignment operators, and the ++ and -- shorthand with practical examples.
Bash Arrays
A complete guide to Bash arrays: create indexed and associative arrays, access elements, loop, slice, add and remove items, and check array length.
How to Create a File in Linux
Several ways to create a file in Linux from the command line: touch, redirection, cat, echo, printf, heredoc, and text editors. Includes examples for each method.
.bashrc vs .bash_profile: What is the Difference?
Understand the difference between .bashrc and .bash_profile, when each file is loaded, and where to put aliases, PATH changes, and environment variables.
How to Compare Strings in Bash
Bash string comparison using equal, not equal, regex, and pattern matching operators. Includes examples for empty strings, case-insensitive matching, and substrings.
How to Parse Command-Line Options in Bash with getopts
This guide explains how to parse command-line options in Bash with getopts, including option strings, OPTARG and OPTIND, error handling, and practical script examples.
Bash Select (Make Menus)
Learn how to use the Bash select construct to create interactive menus in shell scripts. Includes syntax, practical examples, and combining select with case.
Bash wait Command
Learn how to use the Bash wait command to wait for background processes to finish. This guide covers syntax, options, and practical scripting examples.
