[SOLVED] Software Update

[Tom Varghese]

Hi,
I am using f 12. Every time I update software, a new tab appears in the boot menu screen to access both previous and new kernels. I thinks this will be a problem after 10 or more updates. Can I remove older kernel versions in order to save hard disk? I think dumping of all versions of kernel eat my hard disk.

[yancek]

The kernel itself doesn't take up much space. Go to your boot directory and right click on a kernel and click properties to see how big it is. It does get cumbersome and makes for a messy boot menu. I'd suggest setting your most recent kernel as the default, boot it to make sure everything works before deleting old kernels. Usually you are asked if you want to update the kernel when doing an update and there is not reason to if everything is working, just say no. I don't use Fedora so I'm not sure if it gives you the option.

[oz]

Can I remove older kernel versions in order to save hard disk?

Yes, you can remove any kernel versions that you no longer need or want. They only stay on the system after kernel upgrades in case the new kernel doesn't work properly.

[Tom Varghese]

I'd suggest setting your most recent kernel as the default, boot it to make sure everything works before deleting old kernels.

But How to set one as default?

Yes, you can remove any kernel versions that you no longer need or want. They only stay on the system after kernel upgrades in case the new kernel doesn't work properly.

How to delete others?

[devils casper]

Execute this

su -
rpm -q kernel

It will display a list of installed kernels. Note down complete name of earlier version and execute this to un-install it

rpm -e kernel-<version>

Make sure to un-install earlier version only.

You have to set default value for latest kernel in /boot/grub/grub.conf file.
Post the contents of grub.conf file after uninstalling earlier kernel(s).

[yancek]

Set the default by going to the /boot/grub/grub.conf file and counting from the top the title lines. Put the number of the one you want to boot next to the "default" at the top of the page. Grub counts from zero. Obviously do this after removing any kernels you don't want.

[oz]

If you aren't familiar with the inner workings of GRUB, you can find a couple of really good tutorials here:

GRUB bootloader - Full tutorial

GRUB 2 bootloader - Full tutorial

Both are probably the best guides that I've seen on GRUB.

[Tom Varghese]

Thank you all. In case I am not intended to uninstall the kernel, and want to display only the latest one on the boot menu, what do i need to do? Just editing th grub.conf is ok?

[oz]

In case I am not intended to unistall kernel, and want to display only the latest one on the boot menu, what do i need to do? Just editing th boot.conf is ok?

Yes, you just edit out (or comment out) any lines related to kernel entries that you don't want from the /boot/grub/grub.conf file.

[Tom Varghese]

Done.Thanks who helped me