Redhat6.2 upgrade to 6.3 and then demote to Redhat6.2 (Linux kernel demotion) __linux

Now the system kernel has risen from redhat6.2 to 6.3, and is currently degraded

First, view the kernel configuration file

Modifying the configuration file for the Grub boot system

Modify the grub.conf soft link menu.lst configuration

Modify default=* According to the version of the operating system corresponding to the beginning of title in Menu.lst. The first title corresponds to a version of 0, and the second title corresponds to a version of 1. As shown in the figure above, the first title corresponds to the system kernel version of 6.3 (*2.6.32-279.el6.x86_64), if you want to start the 6.3 system, then default=0; Similarly, if you want to start 6.2 (*2.6.32-220.el6.x86_64), Then Default=1

Third, reboot complete verification