run a command with a time limit
Run sleep 10 and terminate it, if it runs for more than 3 seconds
Specify the signal to be sent to the command after the time limit expires. (By default, TERM is sent)
timeout [OPTION] DURATION COMMAND
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
also send a KILL signal if COMMAND is still running
this long after the initial signal was sent
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
- -v, --verbose
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.
GNU coreutils online help:
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Copyright © 2022 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.
kill(1) Full documentation <https://www.gnu.org/software/coreutils/timeout> or available locally via: info '(coreutils) timeout invocation'
Written by Padraig Brady.