This demonstrates file extension extraction and manipulation using parameter expansion.

This demonstrates piping a command string into bash -s to execute it with an argument, showing dynamic Bash command execution.

This demonstrates printing strings on separate lines using echo with the -e flag.

This demonstrates using the ! operator to negate the result of a grep command and checking the exit status with $?.

This demonstrates printing the current Bash version using the built-in variable $BASH_VERSION.

This demonstrates accessing and printing the first and second command-line arguments in a Bash script.

This demonstrates how to check if a file does not exist in Bash using a negated condition.

This demonstrates extracting a range of arguments from the previous command using !!:n-m.

This demonstrates replacing a suffix in a string using parameter expansion.

This demonstrates exporting a variable to make it globally accessible to child processes in a Bash session.

This code demonstrates various methods to concatenate and print strings in Bash, including direct concatenation, variable interpolation, and string appending with the += operator.

This demonstrates navigating up two levels in the directory hierarchy in Bash.

The !n expansion in Bash refers to the nth command in the command history.