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I have a CentOS 7 image on my local machine that I want to allow login as root. This is going to be a system dedicated for testing.

I initially tried using rescue mode and added kernel param "systemd.unit=emergency.target" but it says root login is locked.

So I start /bin/bash instead. I see root in /etc/shadow is locked using "!!". So I run passwd root and assign it a password. However, I am still unable to login as root. It keeps telling me password incorrect (I'm sure password is correct). Is there somewhere else I overlooked?

I am logging in via console, not using SSH.

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Most likely you modified the filesystem in an emergency shell or from a rescue disk. Your SELinux labels are probably wrong for /etc/shadow. Easiest fix is to touch /.autorelabel and reboot normally. It will relabel the filesystem and reboot.

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  • Just want to thank both you and @berndbausch for pointing me to the right direction, I have no idea autorelabel is a thing. Commented Jul 27, 2021 at 18:24

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