How do I remove old kernels from Ubuntu?

The procedure to delete all unused old kernels on Ubuntu Linux version 18.04 and 20.04 LTS is as follows:

1. First, boot into a new kernel.
2. List all other older kernel using the dpkg command.
3. Note down system disk space usage by running the df -H command.
4. Delete all unused old kernels, run: sudo apt –purge autoremove.

How do I safely remove old kernels?

In Linux, the kernel is the core of the operating system. As new versions of Linux are released, your system may update to a newer kernel….Use the Ubuntu Cleaner graphical interface to remove the old kernels:

1. Check the Old Kernel box.
2. Select the kernels you want to remove completely.
3. Click the Clean button.

How do I remove old kernels from grub?

7 Answers

1. Open up a terminal ( Ctrl + Alt + T ).
2. Type uname -r .
3. Run the following command: dpkg –list | grep linux-image .
4. Note down the names of all the kernels which you want to remove.
5. To remove the kernels, run: sudo apt-get purge linux-image-x.x.x.x-xyz (replace the kernel name with an appropriate one).

How do you remove a kernel?

Remove Older Kernel Entries

1. Select “Package Cleaner” on the left and “Clean Kernel” from the right panel.
2. Press the “Unlock” button at the lower right, enter your password.
3. Select from the displayed list the kernel images and headers you wish to remove.

How do I revert to a previous kernel in Ubuntu?

Hold the Shift key when Ubuntu is loading, choose Advanced options for Ubuntu from the Grub screen and load the kernel version. NOTE: This works for Ubuntu VM running in Virtualbox as well. NOTE: This change is not permanent, as it will revert back to latest kernel on restart.

How do I remove old packages from Ubuntu?

7 Ways to Uninstall Ubuntu Packages

1. Remove With Ubuntu Software Manager. If you run Ubuntu with the default graphical interface, you may be familiar with the default software manager.
2. Use the Synaptic Package Manager.
3. Apt-Get Remove Command.
4. Apt-Get Purge Command.
5. Clean Command.
6. AutoRemove Command.

How do I revert to a previous Linux kernel?

If you’re certain you want to, however, you can sync a kernel package to a specific version with the following command. Replace kernel-name with the kernel you want to downgrade and x.x.x with the version you want.

How do I revert back to my old Linux kernel?

You can always revert to the original kernel by setting the grub. conf file back to 0 and reboot as long as you did not remove any of the kernels files for that release.

How do I get rid of old packages?

How do I erase everything on Ubuntu?

Click on the Ubuntu Software icon in the Activities toolbar; this will open the Ubuntu Software manager through which you can search for, install and uninstall software from your computer. From the list of applications, look up for the one you want to uninstall and then click the Remove button against it.

How do I go back to a previous version of Ubuntu?

copy your /home and /etc folder to a backup media. Re install ubuntu 10.04. Restore your backup (remember to set the correct premissions). Then run the following to reinstall all the program you had before.

Can you downgrade a kernel?

Will downgrading my kernel break anything? When you’re dealing with such a core part of the operating system, this is always a possibility. That said, if you’ve only upgraded, reverting back to an older kernel shouldn’t cause too many problems.

How do I uninstall old Linux kernels?

You can uninstall the old kernels (linux-image-… packages) using Synaptic, and that will remove them from the boot menu. Take care not to remove the running kernel (you can check its version with uname -r). Bear in mind that having a one or two older versions can help you troubleshoot, should something go wrong.

How to clean up old Ubuntu kernel?

Actually an easier (for people who favor GUIs over command line) and apparently more thorough (it found and deleted header files “apt-get purge …” missed) alternative is to just install Ubuntu Tweak. Go to Janitor/System/Old Kernel, select it, and press “Clean”. Show activity on this post.

How to remove old and inexistent kernels from Grub?

Please help with removing the old and inexistent kernels from Grub. Open up a terminal ( Ctrl + Alt + T ). Type uname -r. This will show you the kernel you’re using currently, so you don’t want to remove this. Run the following command: dpkg –list | grep linux-image. This will show the all the kernels that are installed.

How do I preserve the most recent kernel version?

Pass, as a command line argument, the number of most recent kernels you want to preserve. If you want [AND AT YOUR OWN RISK], you can add a -y (or a force flag) to the apt-get command and make it non-interactive. Show activity on this post.