如何快速掌握man手册的使用

man手册内容详细，解释到位，因为好多都是软件的原创者自己写的说明文档，当然是第一手的资料。但是，有几个难点需要克服：

1、英文不易阅读，通常我是先在书上或者网络上找到某个命令的详细说明和解释，然后在通过man手册查看该命令，通俗的讲：带着答案看问题的方法。勉强能够读懂，下一次再次忘记了该命令的用法，直接看man手册（毕竟方便嘛），如果又看不懂了，在查书和网络，把看不懂的地方反复强化，几次后基本就能明白man的英文语义了。

2、不会使用man。其实只有几个常用的命令：

man -f 命令名      //用一句话描述该命令的用途，等同于”whatis“命令，例如：

fly@noi:~$ man grep
fly@noi:~$ man -f grep
grep ()             - print lines matching a pattern
fly@noi:~$ whatis grep
grep ()             - print lines matching a pattern
fly@noi:~$ 

man -k 命令名    //显示所有包含该命令名的所有命令

fly@noi:~$ man -k grep
bzegrep ()          - search possibly bzip2 compressed files for a regular expression
bzfgrep ()          - search possibly bzip2 compressed files for a regular expression
bzgrep ()           - search possibly bzip2 compressed files for a regular expression
egrep ()            - print lines matching a pattern
fgrep ()            - print lines matching a pattern
git-grep ()         - Print lines matching a pattern
grep ()             - print lines matching a pattern
grepdiff ()         - show files modified by a diff containing a regex
lzegrep ()          - search compressed files for a regular expression
lzfgrep ()          - search compressed files for a regular expression
lzgrep ()           - search compressed files for a regular expression
msggrep ()          - pattern matching on message catalog
pgrep ()            - look up or signal processes based on name and other attributes
ptargrep ()         - Apply pattern matching to the contents of files in a tar archive
rgrep ()            - print lines matching a pattern
xzegrep ()          - search compressed files for a regular expression
xzfgrep ()          - search compressed files for a regular expression
xzgrep ()           - search compressed files for a regular expression
zegrep ()           - search possibly compressed files for a regular expression
zfgrep ()           - search possibly compressed files for a regular expression
zgrep ()            - search possibly compressed files for a regular expression
zipgrep ()          - search files in a ZIP archive for lines matching a pattern
fly@noi:~$ 

3、搜索指定章节的关键字，下面的echo在第1和8章都有，如果我想找第1章的：

fly@noi:~$ man -k echo
echo ()             - display a line of text
l2ping ()           - Send L2CAP echo request and receive answer
lessecho ()         - expand metacharacters
pam_echo ()         - PAM module for printing text messages
ping ()             - send ICMP ECHO_REQUEST to network hosts
ping6 ()            - send ICMP ECHO_REQUEST to network hosts
xmessage ()         - display a message or query in a window (X-based /bin/echo)
fly@noi:~$ man -s  -k echo
echo ()             - display a line of text
l2ping ()           - Send L2CAP echo request and receive answer
lessecho ()         - expand metacharacters
xmessage ()         - display a message or query in a window (X-based /bin/echo)
fly@noi:~$ 

4、如果同一个命令，几个章都有，可以指定章号来显示：

fly@noi:~$ man -f printf
printf ()           - format and print data
printf ()           - formatted output conversion
fly@noi:~$ man  printf    //这样就可以显示第3章的了，否则默认是第1章

5、在man手册页内，也查找指定参数：

比如：我想找grep的--color参数的用法：

/--color   //注意：如果有很多选项可以在单词后面加空格在搜索

我想找grep命令中某一个单词，用"\< \>"命令，可以准确匹配一个词，词只能由字母、数字、下划线组成。

/\<n\>