#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 seconds: Interval between executions, in seconds. By default, the program is run every 2 seconds.
• -t, --no-title: Don't print the title bar.
• -b, --beep: Beep each time the command exits with a non-zero status.
• -f file, --file file: Run command whenever this file changes. Can be used multiple times.

#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