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 (1) - print lines matching a pattern fly@noi:~$ whatis grep grep (1) - 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 (1) - search possibly bzip2 compressed files for a regular expression bzfgrep (1) - search possibly bzip2 compressed files for a regular expression bzgrep (1) - search possibly bzip2 compressed files for a regular expression egrep (1) - print lines matching a pattern fgrep (1) - print lines matching a pattern git-grep (1) - Print lines matching a pattern grep (1) - print lines matching a pattern grepdiff (1) - show files modified by a diff containing a regex lzegrep (1) - search compressed files for a regular expression lzfgrep (1) - search compressed files for a regular expression lzgrep (1) - search compressed files for a regular expression msggrep (1) - pattern matching on message catalog pgrep (1) - look up or signal processes based on name and other attributes ptargrep (1) - Apply pattern matching to the contents of files in a tar archive rgrep (1) - print lines matching a pattern xzegrep (1) - search compressed files for a regular expression xzfgrep (1) - search compressed files for a regular expression xzgrep (1) - search compressed files for a regular expression zegrep (1) - search possibly compressed files for a regular expression zfgrep (1) - search possibly compressed files for a regular expression zgrep (1) - search possibly compressed files for a regular expression zipgrep (1) - 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 (1) - display a line of text l2ping (1) - Send L2CAP echo request and receive answer lessecho (1) - expand metacharacters pam_echo (8) - PAM module for printing text messages ping (8) - send ICMP ECHO_REQUEST to network hosts ping6 (8) - send ICMP ECHO_REQUEST to network hosts xmessage (1) - display a message or query in a window (X-based /bin/echo) fly@noi:~$ man -s 1 -k echo echo (1) - display a line of text l2ping (1) - Send L2CAP echo request and receive answer lessecho (1) - expand metacharacters xmessage (1) - 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 (1) - format and print data printf (3) - formatted output conversion fly@noi:~$ man 3 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>