After a failed upgrade rollback kernel Linux7

 

 

First, the            phenomenon

For Linux7 When you upgrade version, restart stuck

 

Second,            analyze the reasons

Restart the OS kernel crash cause

 

Third, the            solution

Fallback kernel

 

Fourth,            the process

1)        The optical disc inserted into the guide

2)        Select troubleshot

 

 

 

 

Into shell

 

Then execute chroot / mnt / sysimage

 

 

3)        Check the kernel

Red is the new standard kernel, rollback

 

4)        Delete the new kernel

#yum remove kernel-3.10.0-693.2.2.el7.x86_64

We can see after the restart , the kernel is deleted , while unnecessary startup items are also automatically deleted.

Reproduced in: https: //blog.51cto.com/12865902/2407088