What should I do if centos7 cannot boot?

Screenshot of the problem:

Solution:

1. Enter single-user mode

The method to enter single-user mode is as follows:

Press the keyboard casually when booting to enter the following menu; select the first item and press the e key to modify it;

Locate ro (linux16)

Change ro to "rw init=/sysroot/bin/sh". After completion, press "Ctrl x" to exit the current state

2. Execute the following commands in sequence

chroot /sysroot/
chmod +x /etc/rc.d/rc.local

3. Restart the system

reboot

Recommended tutorial:centos tutorial

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