Linux man命令查询功能

       Linux系统下很多时候都要用到man命令来查询其他命令的解释；用好man命令能很好的帮助我们完成各种操作；man命令通常是在已知某一命令，需要了解其使用方法和功能时来查询，如：man ls

#man man –了解man命令的使用方法

下面介绍一个有用的man命令选项：-k；其作用在不知道linux都有什么命令时，可用通过-k选项统配查询man命令可查的所有命令名称和命令释义；

[root@db2 Packages]# man -k sar

lvmsar               (8)  - LVM system activity reporter

perlglossary         (1)  - Perl Glossary

sadf                 (1)  - Display data collected by sar in multiple formats

sar                  (1)  - Collect, report, or save system activity information

strip      (1p)  - remove unnecessary information from executable files (DEVELOPMENT)

timer_gettime [timer_settime] (2)  - arm/disarm and fetch state of POSIX per-process timer

timer_settime        (2)  - arm/disarm and fetch state of POSIX per-process timer

另外，与man –k等效的还有一个命令：apropos

[root@db2 Packages]# apropos sar

lvmsar               (8)  - LVM system activity reporter

perlglossary         (1)  - Perl Glossary

sadf                 (1)  - Display data collected by sar in multiple formats

sar                  (1)  - Collect, report, or save system activity information

strip    (1p)  - remove unnecessary information from executable files (DEVELOPMENT)

timer_gettime [timer_settime] (2)  - arm/disarm and fetch state of POSIX per-process timer

timer_settime        (2)  - arm/disarm and fetch state of POSIX per-process timer