whatis

    实例

    1. [root@localhost ~]# whatis ls
    2. ls                   (1)  - list directory contents
    3. ls                   (1p)  - list directory contents
    6. cp                   (1p)  - copy files
    8. [root@localhost ~]# whatis chown
    9. chown                (1)  - change file owner and group
    10. chown                (1p)  - change the file ownership
    11. chown                (2)  - change ownership of a file
    13. [root@localhost ~]# whatis man
    14. man                  (1)  - format and display the on-line manual pages
    15. man                  (1p)  - display system documentation
    16. man                  (7)  - macros to format man pages
    17. man                 (rpm) - A set of documentation tools: man, apropos and whatis.