How to switch user in Centos

First use man to learn tutorial about su then implement.

man su

then use a below-mentioned command to switch between users.

su [anyusername]

su root
password :
[root@localhost ~]$ 

##now enjoy your commands.

The command you're looking for is su.

You can use su to change to another user:

su <username>

for more help with the su command, you can read the man page via the man command:

man su