Detailed explanation of whereis example to find a specific program in Linux

Linux finds a specific program where is

The whereis command is mainly used to find program files and provide the storage location of the binary executable file, source code file, and user manual of this file.

1. Find command program

For example, look for the touch command

[root@node1 /]# whereis touch
touch: /usr/bin/touch /usr/share/man/man1/touch.1.gz

The execution effect is as follows:

If you only need to find the binary file of the touch command, you can use the -b option:

[root@node1 /]# whereis -b touch
touch: /usr/bin/touch

The effect is as follows:

2. Find the application

For example, find the nginx service

[root@node1 /]# whereis nginx
nginx: /usr/sbin/nginx /usr/lib64/nginx /etc/nginx /usr/share/nginx /usr/share/man/man8/nginx.8.gz

Find java

[root@node1 /]# whereis java
java: /usr/java/jdk1.8.0_191/bin/java /usr/local/jdk1.8.0_191/bin/java

If the queried program does not exist, an empty string is returned.

For example, to find the hello program

[root@node1 /]# whereis hello
hello:

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