CentOS Boot Exception handling

Scenario Description:

Installation of the CentOS process due to the lack of certain drivers or root pass parameter error, unable to properly boot the system, this time need to use the Dracut debugging parameters, to help

Solution:

• Rdinfo

  When the quiet parameter is set, print the information to the console

• Rdshell

  Provides a console debug when the root file fails to mount

• Rdinitdebug

  All scripts will be added set-x parameter set debug parameters, output log to console and DMESG

• Rdbreak

  Terminating the console before mounting a real root filesystem

• rdbreak= {Cmdline|pre-udev|pre-trigger|initqueue|pre-mount|mount |pre-pivot}

• Provides console debugging at a defined breakpoint

• Rdudevinfo

• Set Udev to LogLevel info

• Rdudevdebug

• Set Udev to LogLevel debug

Common ways:

1) Root file system load failed, use Rdshell parameter

2) to manually operate before mounting the real root filesystem, use the Rdbreak parameter

Ask the following questions:

1) When we use Rdbreak debugging completed, how to mount the root file system properly, do we need to restart the system?? enen!!

CentOS Boot Exception handling