How to solve the problem that root user cannot log in under centos

How to solve the problem that root user cannot log in under centos?

Problem:

The root password under centos is entered correctly, but you still cannot log in locally. When you enter an incorrect password, you will be prompted for an incorrect password.

Cause:

The root user is disabled.

Disable command:

usermod -s /sbin/nologin

Solution:

1. Enter single-user mode and edit the /etc/passwd file;

vim /etc/passwd

2. Find the root user information line. The displayed information is as follows:

root:x:0:0:root:/root:/sbin/nologin

It means that the root user is indeed disabled.

3. Change the following "/sbin/nologin" to "/bin/bash". The modified information is:

root:x:0:0:root:/root:/bin/bash

4. Just restart the machine.

Related recommendations: centOS tutorial

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