Name

watch - execute a program periodically

Synopsis

$ watch [-n interval] [-t] [-b] command

Description

Run a command full-screen periodically until interrupted, then return the aggregated error code.

Options

• '-n': Interval between executions, in seconds. By default, the program is run every 2 seconds.
• '-t': Don't print the title bar.
• '-b': Beep each time the command exits with a non-zero status

Exit Values

• 0 - Success
• 1 - At least one invocation of the command failed or exited with a non-zero status

Examples

$ watch -n1 ls
$ watch -t -- uname -a