Remove old kernel in Centos

So you try to update you server and it says that you /boot pertision is full and cant update kernel.
Will this is how you remove some old kernels so you can keep your system up to date.

 

1. First what kernel is running now (We dont want to remove that kernel)

uname -a
Linux install 2.6.32-279.19.1.el6.x86_64 #1 SMP Tue Nov 6 23:43:09 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Ok kernel 2.6.32-279.14.1 is running now

What kernels are install

rpm -q kernel
kernel-2.6.32-279.el6.x86_64
kernel-2.6.32-279.14.1.el6.x86_64
kernel-2.6.32-279.19.1.el6.x86_64

So then remove the kernels that ARE NOT RUNNING ON

rpm -e kernel-2.6.32-279.el6.x86_64

And now you can install the new kernel

 

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