How to view linux environment variables

First execute the following command:

[root@zcwyou ~]# echo $PATH

The output content is as follows:

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

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If there are two executable files with the same name in two different directories, then the shell will run the directory located in the environment variable included in the PATH, you can use the ¨C2C or ¨C3C command: ¨G0G, the output result is similar to the following:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

If in two different If there are two executable files with the same name in a directory, the shell will run the file located in the first directory in the PATH environment variable.

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