神马文学网linux命令之whatis
来源：百度文库 编辑：神马文学网 时间：2024/04/29 05:16:50
要了解关于这个命令的更多信息，可以使用：
$ man echo
如果您不知道某个特殊任务所需的命令，您可以用 man -k （也称为 apropos）和一个主题来生成可能的命令。例如：
$ man -k files
一个很有用但常常被忽视的命令可以提供关于使用 man 本身的信息：
$ man man
您可以用 SPACEBAR 来浏览任意的 man 页面；UP ARROW 将向上翻滚文件。.要退出，则输入 q,!，或 CTRL-Z。
通过makewahtis建立wathis所需数据库
[root@server1 ~]# whatis ls
ls (1) - list directory contents
ls (1p) - list directory contents
[root@server1 ~]# whatis cat
cat (1) - concatenate files and print on the standard output
cat (1p) - concatenate and print files
里面的1和1p是section
常见的包括
Sections of the Manual Pages
The manual Sections are traditionally defined as follows:
1 Commands (Programs)
Those commands that can be executed by the user from within a shell.
2 System calls
Those functions which must be performed by the kernel.
3 Library calls
Most of the libc functions.
4 Special files (devices)
Files found in /dev.
5 File formats and conventions
The format for /etc/passwd and other human-readable files.
6 Games
7 Conventions and miscellaneous
Overviews of various topics, conventions and protocols, character set standards, and miscellaneous other things.
8 System management commands
Commands like mount(8), many of which only root can execute.
此外：
man-pages currently includes pages from the POSIX.1 standard in Section 0p (Header Files), 1p (Commands), and 3p (Functions).