What Is Eval Command in Unix?

The eval command is one of the most powerful and flexible commands in Linux. It combines all the given arguments and evaluates the combined expression and executes it, and returns the exit status of the executed command. This command is commonly used to execute arguments as a shell command on the Linux system.

What does eval set do?

The set command takes any arguments after the options (here “–” signals the end of the options) and assigns them to the positional parameters ($0.. $n). The eval command executes its arguments as a bash command. If you do this without the eval command you’ll get the same result as the first example.

What is eval in bash script?

eval is a builtin command of the Bash shell which concatenates its arguments into a single string. Then it joins the arguments with spaces, then executes that string as a bash command.