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How do I remove old kernel images from Ubuntu?

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How do I remove old kernel images 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 remove old kernel 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 I delete 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 delete a compiled kernel?

These steps are generally work for me, first make sure you boot into the desired version of the kernel you would want to remove:

  1. rm /boot/{config-,initrd. img-,System. map-,vmlinuz-}`uname -r`
  2. rm -rf /lib/modules/`uname -r`
  3. sudo update-grub.
  4. reboot – this should not reboot you back to the previous version of the kernel.

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 get rid of old Vmlinuz?

Type sudo dpkg -P linux-image-4.8. 0-46-generic (changing the kernel version number, of course). This tells the system to delete the package. This may is likely to result in a complaint about broken dependencies.

How do I know what kernels I have Ubuntu?

To check which kernel is currently running on your system, use the uname command with the “release” or -r switch. This will output the kernel version (release) number.

How do I remove old kernels in RHEL 7?

Remove old kernels from Redhat 7.4 / CentOS 7

  1. Step 1: First check, do you have any old kernel images on your RedHat / CentOS system.
  2. Step 2: Install yum-utils package.
  3. Step 3: Remove old kernels.
  4. Step 4: Remove unwanted dependencies not required any more in the system.

How do I reinstall RHEL kernel?

Install and Update Redhat Kernel RPM

  1. 1) Note down the current kernel installed packages.
  2. 2) Download the latest RPMs.
  3. 3) Confirming the Downloaded RPM.
  4. 4) Install/Update kernel RPMs.
  5. 5) Creating Initial RAM disk.
  6. 6) Verify the grub configuration.
  7. 7) Reboot the machine.

How do I revert to a previous Linux kernel?

How do I revert back to an old Linux kernel?

2 Answers

  1. sudo view /boot/grub/grub. cfg and copy the full name of your old kernel.
  2. sudo vi /etc/default/grub and, at the top, change GRUB_DEFAULT=0 to instead read GRUB_DEFAULT=your_kernel_name_from_grub. cfg , and save the change (you may like to keep a copy of the original file for safety).

How do I delete old Linux kernel images?

1 Delete Old Kernel Images. The procedure is as follows for a Debian or Ubuntu Linux system. 2 Step 1 – Boot into new kernel. First, boot into newly installed kernel. 3 Step 2 – Delete unwanted and unused kernel images. 4 Understanding package states in Ubuntu and Debian Linux. 5 Deleting all old kernels easily. 6 Conclusion.

How to remove old Linux kernel versions that I don’t use?

I have old Linux kernel versions that I don’t use so I was trying to remove them. Here are the steps to remove unused kernels. To easily remove older versions kernels, e.g. kernels starting from 4.0 and so on. sudo apt-get purge linux-image-4.*

How do I purge old kernels in Ubuntu terminal?

sudo purge-old-kernels The utility scans your system and removes all but the latest two kernels. If you want to keep more than the default two, use the ––keep option: sudo purge-old-kernels ––keep 3 –qy

How do I change the Linux kernel on Ubuntu?

1. Open the Ubuntu Software Center. 2. Enable the search bar and search for linux-image. 3. In the lower-left corner, you should see a hyperlink for Show xx technical items. Click this link to display the list of Linux kernels. 4. Refer back to your current kernel, which needs to remain on the system.

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