What Is Exec Command in Unix

On Unix-like

What is exec command in shell script?

The exec command is a powerful tool for manipulating file-descriptors (FD), creating output and error logging within scripts with a minimal change. In Linux, by default, file descriptor 0 is stdin (the standard input), 1 is stdout (the standard output), and 2 is stderr (the standard error).

What is exec [email protected] in shell?

exec “[email protected]” is typically used to make the entrypoint a pass through that then runs the docker command. It will replace the current running shell with the command that “[email protected]” is pointing to. By default, that variable points to the command line arguments.