System Diary

Best Way To Fix Ubuntu Grub To Remove Old Kernels

If you are getting error code of uninstalling old Ubuntu grub kernel on your computer, you should check these recovery methods.

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    If people use Ubuntu for a longer period of time, the number of different versions of kernels of all types increases accordingly. Since the kernel, along with the header files and kernel modules, can take up space on your hard drive (approximately in MiB), you need to manually remove old kernel versions that are no longer in use as part of system maintenance. This is especially important for encrypted systems that use a separate partition for / boot: if it is fully occupied, kernel updates can no longer be installed automatically.

    There are several ways to remove unwanted kernels. If the standard methods do not lead to the desired result and there are many old kernels available, then removing them one by one takes a relatively long time. The following instructions can help you here.

    Requirements¶

    The father defines the active kernel so that it is not removed first:

    Identifying Remote Kernels¶

    Using the [1] command:

     dpkg 'linux- [ihs] *' -k | sed '/ ^ ii /! d; / '"$ (uname -r | zed" s /  ([- 0-9] * ) -  ([^ 0-9]  + ) /  1 / ")"' / d; s / ^ [^] * [^] *  ([^] * ). */  1 /; / [0-9] /! from | tee rods for removal 

    all old kernels, including header files, except for the current family and a copy of this list in kernel_to_removed.

    Removing The Old Kernel¶

    Removing outdated kernels is now done with

     cat_Kernel_to_removed | xargs sudo apt-get -y remove 

    to clean up the system of kernel versions that are no longer needed. After the deletion is complete, the temporarily created list is deleted:

    Keep Some Cores¶

    If people want to keep more than one of the listed kernels so that others can use some stable kernels, for example in an emergency, the partner opens the generated kernel list for removal with the [2] editor and removes the bypasses. Those versions of the kernel that a person wants to keep. It should be noted that the kernel version usually has more than one entry. If the list ultimately contains only the kernel versions the user wants to keep, save them and exit the editor.

    Out Of Memory Space¶

    In practice, it is also possibleThe following special case may arise: if updates need to be installed, but there is no more free space on a separate / boot partition and there are no more free inodes. When trying to uninstall the old kernel, the APT package management reports the following standard output: Fehler:

    ubuntu grub alte kernel entfernen

     gzip: no holes left on device 

    Kernels that are no longer needed should be removed using dpkg. To do this, it initially fails to determine which kernel versions are no longer needed:

     dpkg -l 'linux- [ihs] *' | zed '/ ^ ii /! d; / '"$ (uname -r | zed" s /  ([- 0-9] * ) -  ([^ 0-9]  + ) /  1 / ")"' / d; s / ^ [^] * [^] *  ([^] * ). * /  1 /; / [0-9] /! d '

    After checking the kernel version, you can uninstall:

     dpkg -l 'linux- [ihs] *' | zed '/ ^ ii /! d; / '"$ (uname -r | sed] *" s /  ([- 0-9] * ) -  ([^ 0-9]  + ) /  1 / ")"' / d; s / ^ [^ [^] *  ([^] * ). * /  1 /; / [0-9] /! From | xargs sudo dpkg -P 

    Then you should always check for bad or incompletely installed packages:

     dpkg -l linux- [ihs] * Sed | '1,6d' | grep -vE '^ ii | ^ a | ^ rc '

    If the output is not empty, missing / unconfigured packages should be identified with:

    can be installed later.

    Depending on the durationDuring this time during which updates cannot be imported any longer, it may happen that after the update there is again no available storage space. Then you should repeat the listed steps.

    Links ¶

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    ubuntu grub alte kernel entfernen

     dpkg -b 'linux- [ihs] *' | '/ ^ ii /! d; / '"$ (uname sed -r | zed" s /  ([- 0-9] * ) -  ([^ 0-9]  + ) /  1 / ")"' / d; s / ^ [^] * [^] *  ([^] * ). * /  1 /; / [0-9] /! from | remove tee rods 
     cat kernels remove | xargs sudo apt-get Purge -l 
     dpkg -l 'linux- [ihs] *' | zed '/ ^ ii /! d; / '"$ (uname -r | sed" s /  ([- 0-9] * ) -  ([^ 0-9]  + ) /  1 / ")"' / d; s / ^ [^] * [^] *  ([^] * ). * /  1 /; / [0-9] /! from 
     dpkg -l 'linux- [ihs] *' | sed '/ ^ ii /! d; / '"$ (uname -r | zed" s /  ([- 0-9] * ) -  ([^ 0-9]  + ) /  1 / ")"' / d; s / ^ [^] * [^] *] * )  ([^. * /  1 /; / [0-9] /! d '| xargs sudo dpkg -P 
     dpkg -l linux- [ihs] * | sed '1,6d' | grep -vE '^ ii | ^ a | ^ rc '

    Bugs or flaws in Linux Von kernel systems are always rediscovered, or new kernels are simply released with new features.
    With regular updates, a whole collection of older kernel versions can be created in the system.
    This forces the affected systems to be cleaned from time to time.

    Usually aAutocleaning apt-get autoclean is sufficient to keep the system relatively clean.
    However, older Linux kernels fill up the hard drive and are usually no longer needed.
    There are several ways to remove this. Today I want to present you with three options.

    First Option – Manually

    I already mentioned the first option in the blog, and it is done using the dpkg / apt package manager and involves manual work.

    dpkg | grep --list linux sudo dpkg --purge linux-image-4.4.0-xx-headers-generic linux-image-4.4.0-xx-generic linux-image-extra-4.4.0-xx-generic < / pre> sudo dpkg --purge linux-image, headers-4.x.x-61,62, ..

    Option Two – Semi-automatic

    Ubuntu 16. Version 04 has a built-in byobu tool that includes the purge-old-kernels command. This

    If not, you can install it correctly with sudo byobu.

    sudo purge-old-kernels

    The command erases all kernels except the last two. If this is not what you want, the behavior can be changed using the –keep parameter.

    sudo purge-old-kernels --keep 3

    The Third Option Is Automatic

    For automatic updates and other tasks, Ubuntu offers a toolt using automatic updates. pkg-reconfigure

    sudo -plow unattended-upgrade Unattended-Upgrade :: Remove-Unused-Dependencies "true";

    Conclusion

    If time is of the essence, doom is an automatic method

    The second option, cleaning old kernels, is perhaps the easiest and fastest method to rid the system of infected sites.

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