Resest root password on CentOS 7
Resest root password on CentOS 7
Start server, at the boot menu press e to edit the selected item

Finde the line with "ro"

remove ro and type rw init=/sysroot/bin/sh

Save changes - CTRL + X
in single user mode type
chroot /sysroot

You can now change the password command:
passwd root
After creating the password, update SELinux parameters:
touch /.autorelabel