TIMEOUT(1) User Commands TIMEOUT(1)

timeout - run a command with a time limit

timeout [OPTION]

Start COMMAND, and kill it if still running after DURATION.

Mandatory arguments to long options are mandatory for short options too.


exit with the same status as COMMAND, even when the
command times out


when not running timeout directly from a shell prompt,
allow COMMAND to read from the TTY and get TTY signals; in this mode, children of COMMAND will not be timed out

-k, --kill-after=DURATION

also send a KILL signal if COMMAND is still running
this long after the initial signal was sent

-s, --signal=SIGNAL

specify the signal to be sent on timeout;
SIGNAL may be a name like 'HUP' or a number; see 'kill -l' for a list of signals
diagnose to stderr any signal sent upon timeout
display this help and exit
output version information and exit

DURATION is a floating point number with an optional suffix: 's' for seconds (the default), 'm' for minutes, 'h' for hours or 'd' for days. A duration of 0 disables the associated timeout.

Upon timeout, send the TERM signal to COMMAND, if no other SIGNAL specified. The TERM signal kills any process that does not block or catch that signal. It may be necessary to use the KILL signal, since this signal can't be caught.

if COMMAND times out, and --preserve-status is not specified
if the timeout command itself fails
if COMMAND is found but cannot be invoked
if COMMAND cannot be found
if COMMAND (or timeout itself) is sent the KILL (9) signal (128+9)
the exit status of COMMAND otherwise

Some platforms don't currently support timeouts beyond the year 2038.

Written by Padraig Brady.

GNU coreutils online help: https://www.gnu.org/software/coreutils/
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Copyright © 2024 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


Full documentation https://www.gnu.org/software/coreutils/timeout
or available locally via: info '(coreutils) timeout invocation'

March 2024 GNU coreutils 9.5