linux command


Linux Command – watch ใช้ในการ monitor process ที่ทำงานอยู่



watch <command>

$ watch free

Every 2.0s: free Wed May 10 13:09:54 2017

 total used free shared buff/cache available
Mem: 3969412 2304100 834428 66476 830884 1316136
Swap: 1756156 765192 990964
 total used free shared buff/cache available
Mem: 3969412 2302888 835672 66476 830852 1317392
Swap: 1756156 765192 990964




arch [OPTION]...



เป็นคำสั่งที่ใช้ในการ monitor process ที่ทำงานอยู่ เช่น การ copy ข้อมูล ขนาด file ที่กำลังโตขึ้น หรือ ข้อมูล free memory แบบ realtime



 -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 and style 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)

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

 -v, --version
 Display version information and exit.





คำสั่ง Unix – Linux Command

Linux, Unix


Author: Suphakit Annoppornchai


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