【Linux 知识点】man的一些技巧

Termainal中输入man sleep输出的内容是：
本来要找Sleep()函数 结果找的Linux命令。
输入man 3 sleep 或者man -a sleep

SLEEP(1)                                                                      User Commands                                                                      SLEEP(1)

NAME
       sleep - delay for a specified amount of time

SYNOPSIS
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SEE ALSO
       sleep(3)

       Full documentation at: <https://www.gnu.org/software/coreutils/sleep>
       or available locally via: info '(coreutils) sleep invocation'

GNU coreutils 8.30                                                            September 2019                                                                     SLEEP(1)