如何在linux下查找命令的使用方法?

ENV

fedora 29 workstation x86_64

which 查看命令的路径

which

$ whatis which
which (1)            - shows the full path of (shell) commands.

whereis 查看命令所在二进制、源码、手册所在的位置

whereis

$ whatis whereis
whereis (1)          - locate the binary, source, and manual page files for a command

whatis 查看命令的功能

whatis

$ whatis whatis
whatis (1)           - display one-line manual page descriptions

man 查看命令的手册

man

$ whatis man
man (1)              - an interface to the on-line reference manuals
man (1p)             - display system documentation
man (7)              - macros to format man pages

tab 键盘操作

当命令太长记不清时, 使用 tab 键进行自动补全或提示.