CentOS 7 crack root password

• Power on and press "e" key
• Find the line starting with linux16 and press "End" to adjust to the end of the line
• Add breaking information: rd.break console=tty0
• Ctrl+x to enter rescue mode
• Remount the root directory in a read-write manner: mount -o remount,rw /sysroot/
• Switch to the root directory: chroot /sysroot/
• Change the password for root to 123
• Change the mode in /etc/selinux/config to disabled or touch /.autorelabel (mark the next boot to redo the SELinux label)
• exit reboot