time
Linux Command – time ใช้ในการจับเวลาการทำงาน process
คำสั่ง
time <command>
$ time df Filesystem 1K-blocks Used Available Use% Mounted on udev 1964668 0 1964668 0% /dev tmpfs 396944 26872 370072 7% /run /dev/sda1 74843288 4598524 66419820 7% / tmpfs 1984704 0 1984704 0% /dev/shm tmpfs 5120 0 5120 0% /run/lock tmpfs 1984704 0 1984704 0% /sys/fs/cgroup /dev/sda2 185307 57082 114535 34% /boot tmpfs 396944 0 396944 0% /run/user/1000 real 0m0.015s user 0m0.000s sys 0m0.000s
โครงสร้างคำสั่ง
time [ -apqvV ] [ -f FORMAT ] [ -o FILE ]
[ --append ] [ --verbose ] [ --quiet ] [ --portability ]
[ --format=FORMAT ] [ --output=FILE ] [ --version ]
[ --help ] COMMAND [ ARGS ]
รายละเอียด
เป็นคำสั่งที่ใช้ในการจับเวลาการทำงาน process
Option
-o FILE, --output=FILE Write the resource use statistics to FILE instead of to the standard error stream. By default, this overwrites the file, destroying the file's previous contents. This option is useful for collecting information on interactive programs and programs that produce output on the standard error stream. -a, --append Append the resource use information to the output file instead of overwriting it. This option is only useful with the `-o' or `--output' option. -f FORMAT, --format FORMAT Use FORMAT as the format string that controls the output of time. See the below more information. --help Print a summary of the command line options and exit. -p, --portability Use the following format string, for conformance with POSIX standard 1003.2: real %e user %U sys %S -v, --verbose Use the built-in verbose format, which displays each available piece of information on the program's resource use on its own line, with an English description of its meaning. --quiet Do not report the status of the program even if it is different from zero. -V, --version Print the version number of time and exit.
กลุ่มคำสั่ง
tcsh(1), printf(3)
Reference:
Author: Suphakit Annoppornchai
Credit: https://saixiii.com
