apropos

apropos [-dalv?V] [-e|-w|-r] [-s list] [-m system[,...]] [-M path] [-L locale] [-C file]

• search the manual page names and descriptions 帮助手册"参数"内容查询

• 常用选项

  -a:require all keywords to match 将所有关键字一起匹配寻找
  

• 普通查询,查找后可以使用man查看详细手册

  [xzt7566@centos7-test Downloads]$ apropos who
  at.allow (5)         - determine who can submit jobs via at or batch
  at.deny (5)          - determine who can submit jobs via at or batch
  btrfs-filesystem (8) - command group of btrfs that usually work on the whole filesystem
  ipsec_newhostkey (8) - generate a new raw RSA authentication key for a host
  ipsec_showhostkey (8) - show host's authentication key
  w (1)                - Show who is logged on and what they are doing.
  who (1)              - show who is logged on
  who (1p)             - display who is on the system
  whoami (1)           - print effective userid