about kernel update.......

[sunnyy9]

i updated the kernel frm 3.2.9.4 to latest version in fedora, i have a query, is this new kernel installed seperately without removing the older one or it updates over the old one........

coz i m seeing the previous kernel in my grub menu.......

is there a way to remove those old kernel's??

[DBelton]

by default, yum keeps the current kernel and 2 older kernels.

And yes, you can remove the old kernels, BUT I would recommend keeping them just in case you have a kernel update that won't boot. Then you can at least get your system booted using one of the old kernels.

You can tell yum how many kernels to keep by editing the /etc/yum.conf file

There is a line that has installonly_limit=3 You can change that to the number of kernels you wish to keep on your system. Again, I recommend keeping it at 3 unless you wish to keep more.

[sunnyy9]

thanks for the information, i was not going to delet both of the old kernels, just was worrying if, there r more kernel updats in future, my grub menu will be full of those kernel's.........


just for verification, system keeps 3 kernel's by default right?

and if the new update is installed, the most older version will be replaced, right?
and if the older one is replaced, which one will be replaced, the one with fedora is installed from the beginning, or the first updated after install????

[DBelton]

correct..

Once you get 3 kernels installed, then when you update your kernel, it will start removing the oldest kernel, keeping the 3 newest ones.

And it does remove the oldest kernel, starting with the one that was installed when you did the initial Fedora install.

[sunnyy9]

thnks frnd.......for clearing my doubts..........