whatis

查詢一個命令執行什么功能

補充說明

whatis命令 是用于查詢一個命令執行什么功能，并將查詢結果打印到終端上。

whatis命令在用catman -w命令創建的數據庫中查找command參數指定的命令、系統調用、庫函數或特殊文件名。whatis命令顯示手冊部分的頁眉行。然后可以發出man命令以獲取附加的信息。whatis命令等同于使用man -f命令。

語法

whatis

實例

[root@localhost ~]# whatis ls
ls                   (1)  - list directory contents
ls                   (1p)  - list directory contents

[root@localhost ~]# whatis cp
cp                   (1)  - copy files and directories
cp                   (1p)  - copy files

[root@localhost ~]# whatis chown
chown                (1)  - change file owner and group
chown                (1p)  - change the file ownership
chown                (2)  - change ownership of a file
chown                (3p)  - change owner and group of a file

[root@localhost ~]# whatis man
man                  (1)  - format and display the on-line manual pages
man                  (1p)  - display system documentation
man                  (7)  - macros to format man pages
man                 (rpm) - A set of documentation tools: man, apropos and whatis.
man-pages           (rpm) - Man (manual) pages from the Linux Documentation Project.
man.config [man]     (5)  - configuration data for man