2.2  ! command

2.2.1  Syntax

! command

2.2.2  Purpose

Run a program, or escape to a shell.

2.2.3  Comments

Any command typed here will be passed to the system for it to execute.

The bare command ! will spawn an interactive shell. Exiting the shell will return.

2.2.4  Examples

! ls *.ckt
Run the command ls *.ckt as if it were a shell command.

!
No arguments mean to spawn an interactive shell.