Commands in Linux are utilities that allow users to perform basic and advanced tasks on the operating system. These commands are executed on the Linux terminal, which provides a command-line interface for users to interact with the system. The terminal in Linux is similar to the command prompt in Windows OS. It's worth noting that the commands in Linux are case-sensitive, and users must be careful with the spelling and capitalization of the commands they enter. Whenever you want a quick reference, just review the below table: Command Usage ls Lists the content of a directory alias Define or display aliases unalias Remove alias definitions pwd Prints the working directory cd Changes directory cp Copies files and directories rm Remove files and directories mv Moves (renames) files and directories mkdir Creates directories man Displays manual page of other commands touch Creates empty files chmod Changes file permissions ./ Runs an executable exit Exits the current shell session s