nice [OPTION] [COMMAND [ARG]...]
!subtitle:功能
运行命令时附带调度优先级。
!subtitle:类型
可执行文件（/usr/bin/nice），属于 coreutils。
!subtitle:参数
OPTION 选项：
-n, --adjustment=N - 将优先级设为 N；范围是 [-20, 19]，数值越小越优先，默认为 10
--help - 显示帮助
--version - 显示版本
COMMAND - 要运行的命令；如果不传递此参数则打印当前优先级
ARG - 传递给 COMMAND 的参数列表
$ nice # 查看直接运行命令的优先级（通常是 0）
0
$ nice my_cmd # 默认将优先级设为 10，低于直接运行命令的优先级
$ sudo nice -n -20 my_cmd # 默认将优先级设为 -20，只有 root 用户才能提高优先级（小于 0）
NICE(1) User Commands NICE(1)
NAME
nice - run a program with modified scheduling priority
SYNOPSIS
nice [OPTION] [COMMAND [ARG]...]
DESCRIPTION
Run COMMAND with an adjusted niceness, which affects process schedul‐
ing. With no COMMAND, print the current niceness. Niceness values
range from -20 (most favorable to the process) to 19 (least favorable
to the process).
Mandatory arguments to long options are mandatory for short options
too.
-n, --adjustment=N
add integer N to the niceness (default 10)
--help display this help and exit
--version
output version information and exit
NOTE: your shell may have its own version of nice, which usually super‐
sedes the version described here. Please refer to your shell's docu‐
mentation for details about the options it supports.
Exit status:
125 if the nice command itself fails
126 if COMMAND is found but cannot be invoked
127 if COMMAND cannot be found
- the exit status of COMMAND otherwise
AUTHOR
Written by David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2023 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.
SEE ALSO
nice(2), renice(1)
Full documentation <https://www.gnu.org/software/coreutils/nice>
or available locally via: info '(coreutils) nice invocation'
GNU coreutils 9.4 April 2024 NICE(1)