This demonstrates using the =~ operator in Bash to test a string against a regex pattern for email validation.

This demonstrates basic brace expansion to generate multiple strings or arguments.

This demonstrates the use of brace expansion to generate multiple filenames.

This demonstrates combining multiple ranges using brace expansion in Bash.

This demonstrates conditional execution in Bash using || and && operators to chain commands based on the success or failure of previous commands.

This demonstrates generating a sequence of numbers using brace expansion.

This demonstrates reading user input in a Bash script and echoing it back.

This demonstrates creating and managing aliases in Bash, including bypassing an alias to use the original command and listing all defined aliases.

This demonstrates the use of a single-line comment in Bash.

This demonstrates performing arithmetic operations in Bash using the $((...)) syntax.

This demonstrates string comparison in Bash.

This demonstrates checking for the existence of a file in Bash.

This demonstrates command chaining using && and || operators to create a directory and handle errors.

This demonstrates various operations on a Bash associative array (dictionary), including accessing, retrieving, and manipulating key-value pairs.

This demonstrates basic directory navigation by changing the current directory to foo.

This demonstrates using subshells to execute commands in different directories without affecting the current shell's working directory.

This demonstrates assigning a default value to a variable using the := operator in parameter expansion.

This demonstrates passing a file as standard input to a Python script using the < redirection operator.

This demonstrates reading from standard input (stdin) and exporting it as an environment variable.

This demonstrates redirecting standard output to a file.