whereis命令：locate the binary, source, and manual page files for a command
【功能】查找文件、手册页、命令等的相关位置，
【语法】
whereis options argument
【常用选项】
-b:只查找二进制文件位置 -m:只查找手册页部分
【实例1】查找二进制文件所在位置
[root@perthon50 tmp]# whereis -b passwd passwd: /usr/bin/passwd /etc/passwd [root@perthon50 tmp]# whereis -b shadow shadow: /etc/shadow /usr/include/shadow.h
【实例2】查找manual手册页
[root@perthon50 tmp]# whereis -m passwd passwd: /usr/share/man/man1/passwd.1.gz /usr/share/man/man5/passwd.5.gz [root@perthon50 tmp]# whereis -m cd cd: /usr/share/man/man1/cd.1.gz /usr/share/man/man1p/cd.1p.gz [root@perthon50 tmp]# whereis -m sort sort: /usr/share/man/man1/sort.1.gz /usr/share/man/man3/sort.3pm.gz /usr/share/man/man1p/sort.1p.gz
whatis命令：search the whatis database for complete words
【功能】在whatis库中搜寻特定的命令
【语法】
whatis COMMAND
【实例】
[root@perthon50 tmp]# whatis passwd passwd (1) - update user‘s authentication tokens passwd (5) - password file passwd [sslpasswd] (1ssl) - compute password hashes [root@perthon50 tmp]# whatis sort sort (1p) - sort, merge, or sequence check text files sort (1) - sort lines of text files sort (3pm) - perl pragma to control sort() behaviour
which命令：shows the full path of (shell) commands
【功能】查看可执行命令的路径
【语法】
which COMMAND
【实例】
[root@perthon50 tmp]# which ls alias ls=‘ls --color=auto‘ /bin/ls [root@perthon50 tmp]# which passwd /usr/bin/passwd [root@perthon50 tmp]# which cd /usr/bin/which: no cd in (/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin) [root@perthon50 tmp]# which sort /bin/sort [root@perthon50 tmp]# which shutdown /sbin/shutdown
本文出自 “perthon” 博客，请务必保留此出处http://perthon.blog.51cto.com/10484057/1766405
linux命令(9)---whereis、whatis、which命令
原文地址：http://perthon.blog.51cto.com/10484057/1766405
