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What happens if you delete your kernel?
Removing old kernels is not inherently unsafe, but if you remove all your kernels and reboot, you’ll be left at an angry Grub screen. Fixing that takes significant know-how (like that but with an apt-get install linux-generic at the end).
Should you remove old Linux kernels?
All unused Linux kernel takes disk space on Ubuntu server, hence you must delete them from the system.
How do I clean up GRUB menu?
Clean up your grub menu from the kernels you do not use
- Determine which Kernel you are using. Just run: uname -r. and write down the result, in my case this was my output: $ uname -r 2.6.22-14-generic.
- Look for all installed kernel images. Go to /boot/ and list its contents. cd /boot ls vmlinuz*
- Remove the kernels you want.
How to remove old kernels without specifying the version?
Never use YUM or DNF to remove old kernel packages without specifying the kernel version. We always need at least one kernel package installed on the server while yum/dnf may remove all the installed kernels if you don’t specify the version.
How to properly remove old kernels RHEL / CentOS 8?
You can use rpm -e to remove the kernel but you have to make sure you also remove the mapping dependencies. This may be hard for every user to check so you can use yum remove kernel- to remove specific version of the kernel and all it’s dependencies
Is the kernel 4.18.0 an active kernel?
But then kernel-4.18.0-147.5.1.el8_1.x86_64 is the active kernel. Now I am not sure if this is by design or a BUG. Hopefully it should be by design because the man page clearly says, ” Removes old installonly packages ” which in our case is the active kernel.
Which is the latest version of Linux kernel?
Here currently 3.10.0-957.21.3.el7 version of kernel is loaded on my RHEL Linux node To list all the installed kernel rpms. (The main one is kernel-3.10.0-957.21.3.el7.x86_64) Now I have downloaded an updated version of kernel rpm and the dependency rpm from RHEL online portal.