Linux command tutorial: Comparative search command whereis and which difference-Linux Operation and Maintenance-php.cn

Linux command tutorial: Comparative search command whereis and which difference

巴扎黑

Release： 2017-09-08 10:46:30

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This article mainly introduces relevant information about the difference between Linux command search commands whereis and which. Here are examples of how to distinguish their usage. Friends in need can refer to

Linux The difference between command search command whereis and which

一whereis

1. Syntax

##whereis Command name

Search the path where the command is located and the location of the help document

Options:

-b: Search only Executable file

-m: Only search for help files

2, actual combat

[root@localhost ~]# whereis ls
ls:/usr/bin/ls /usr/share/man/man1/ls.1.gz/usr/share/man/man1p/ls.1p.gz
[root@localhost ~]# whoami
root
[root@localhost ~]# whatis
whatis what?
[root@localhost ~]# whatis ls
ls (1)- list directory contents
ls (1p)- list directory contents
[root@localhost ~]# whereis -b ls
ls:/usr/bin/ls
[root@localhost ~]# whereis -m ls
ls:/usr/share/man/man1/ls.1.gz/usr/share/man/man1p/ls.1p.gz

Copy after login

二which

1. Syntax

which command name

Search command path and alias

2. Actual combat

[root@localhost ~]# which ls
alias ls=&#39;ls --color=auto&#39;
/usr/bin/ls
[root@localhost ~]# which pwd
/usr/bin/pwd
[root@localhost ~]# whereis cd
cd:/usr/bin/cd /usr/share/man/man1/cd.1.gz/usr/share/man/man1p/cd.1p.gz
[root@localhost ~]# which cd
/usr/bin/cd

Copy after login

Three PATH environment variables

are defined System search command path

[root@localhost ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

Copy after login

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