Pchero at 08:41, 25 July 2016

2016-07-25T08:41:15Z

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Pchero at 13:22, 28 August 2015

2015-08-28T13:22:46Z

← Older revision		Revision as of 13:22, 28 August 2015
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	[[category:~~linux~~]]		[[category:command]]

Pchero: Created page with "== Overview == Linux 명령어 watch 정보 정리 == Watch == watch 명령어는 어떤 명령을 주기적으로 실행하고자 할 때 사용할 수 있는 프로그램..."

2015-08-11T07:56:15Z

Created page with "== Overview == Linux 명령어 watch 정보 정리 == Watch == watch 명령어는 어떤 명령을 주기적으로 실행하고자 할 때 사용할 수 있는 프로그램..."

New page

== Overview ==
Linux 명령어 watch 정보 정리

== Watch ==
watch 명령어는 어떤 명령을 주기적으로 실행하고자 할 때 사용할 수 있는 프로그램이다.

== Usage ==
<pre>
Usage:
watch [options] command

Options:
-b, --beep beep if command has a non-zero exit
-c, --color interpret ANSI color sequences
-d, --differences[=<permanent>]
highlight changes between updates
-e, --errexit exit if command has a non-zero exit
-g, --chgexit exit when output from command changes
-n, --interval <secs> seconds to wait between updates
-p, --precise attempt run command in precise intervals
-t, --no-title turn off header
-x, --exec pass command to exec instead of "sh -c"

-h, --help display this help and exit
-v, --version output version information and exit
</pre>

== Options ==
<pre>
-d, --differences [permanent]
Highlight the differences between successive updates.
Option will read optional argument that changes highlight to be permanent, allowing to see what has changed at least once since first iteration.

-n, --interval seconds
Specify update interval.
The command will not allow quicker than 0.1 second interval, in which the smaller values are converted.

-p, --precise
Make watch attempt to run command every interval seconds.
Try it with ntptime and notice how the fractional seconds stays (nearly) the same, as opposed to normal mode where they continuously increase.

-t, --no-title
Turn off the header showing the interval, command, and current time at the top of the display, as well as the following blank line.

-b, --beep
Beep if command has a non-zero exit.

-e, --errexit
Freeze updates on command error, and exit after a key press.

-g, --chgexit
Exit when the output of command changes.

-c, --color
Interpret ANSI color sequences.

-x, --exec
command is given to sh -c which means that you may need to use extra quoting to get the desired effect.
This with the --exec option, which passes the command to exec(2) instead.

-h, --help
Display help text and exit.

-v, --version
Display version information and exit.
</pre>

== Samples ==

<pre>
$ watch -n1 date

Every 1.0s: date Tue Aug 11 09:55:39 2015

Tue Aug 11 09:55:39 CEST 2015
</pre>

[[category:linux]]

Watch - Revision history

Pchero at 08:41, 25 July 2016

Pchero at 13:22, 28 August 2015

Pchero: Created page with "== Overview == Linux 명령어 watch 정보 정리 == Watch == watch 명령어는 어떤 명령을 주기적으로 실행하고자 할 때 사용할 수 있는 프로그램..."