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

(Recommended tutorial: centos tutorial)

Solution:

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

vim /etc/passwd

2. Find the root user information line, and 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. Restart the machine.

Recommended related video tutorials: linux video tutorial

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