Difference between revisions of "Clean ubuntu"
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[[Category:Linux]] | [[Category:Linux]] | ||
| + | This page explains how to remove old and un-necessary kernels as well as cleaning the /boot partition. | ||
| − | |||
| − | = | + | =Know the current Kernel version= |
| − | |||
| − | |||
Get your current kernel version | Get your current kernel version | ||
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| + | =Installed kernels= | ||
| − | === | + | ==List kernels that can be removed== |
| + | |||
| + | The following command will return the list of packages that can be removed: | ||
| + | |||
| + | <syntaxhighlight lang="bash"> | ||
| + | dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r|sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | Source: Linux pratique no94, FR, mars|avril 2016 | ||
| + | |||
| + | |||
| + | ==List of all kernels (including current one)== | ||
Get a list of installed kernels | Get a list of installed kernels | ||
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dpkg --list 'linux-image*' | dpkg --list 'linux-image*' | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| + | |||
You should see something like: | You should see something like: | ||
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| + | =Delete kernels= | ||
| + | ==Automatic deletion== | ||
| + | <syntaxhighlight lang="bash"> | ||
| + | # list the package to remove | ||
| + | dpkg -l | awk '{print $2}' | grep -E "linux-(image|headers)-$(uname -r | cut -d- -f1).*" | grep -v $(uname -r | sed -r -e 's:-[a-z]+.*::') | ||
| + | # remove all old kernels at once | ||
| + | apt-get purge $(dpkg -l | awk '{print $2}' | grep -E "linux-(image|headers)-$(uname -r | cut -d- -f1).*" | grep -v $(uname -r | sed -r -e 's:-[a-z]+.*::')) | ||
| − | + | # update grub | |
| − | + | update-grub | |
| − | |||
| − | |||
| − | |||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | Source: Linux pratique no94, FR, mars|avril 2016 | |
| − | |||
| − | + | ==Manual deletion== | |
| − | |||
| − | + | Delete the kernels you don't want/need anymore | |
<syntaxhighlight lang="bash"> | <syntaxhighlight lang="bash"> | ||
| − | + | # Remove old kernels (repeat for each version) | |
| − | + | OLD_KRNL_VERSION=4.4.0-21 | |
| + | apt-get remove --purge linux-headers-${OLD_KRNL_VERSION}* linux-image-${OLD_KRNL_VERSION}* linux-image-extra-${OLD_KRNL_VERSION}* | ||
| + | |||
| + | # at the end update Grub | ||
| + | update-grub | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| + | |||
| + | set ''OLD_KRNL_VERSION'' to the version of the kernel you want to remove. | ||
Latest revision as of 16:31, 22 May 2016
This page explains how to remove old and un-necessary kernels as well as cleaning the /boot partition.
Contents
Know the current Kernel version
Get your current kernel version
uname -r
You should see something like:
3.13.0-32-generic
Installed kernels
List kernels that can be removed
The following command will return the list of packages that can be removed:
dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r|sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d'Source: Linux pratique no94, FR, mars|avril 2016
List of all kernels (including current one)
Get a list of installed kernels
dpkg --list 'linux-image*'
You should see something like:
| / | Name | Version | Architecture | Description |
|---|---|---|---|---|
| un | linux-image | <none> | <none> | (no description available) |
| un | linux-image-3.0 | <none> | <none> | (no description available) |
| rc | linux-image-3.13.0-24-generic | 3.13.0-24.47 | amd64 | Linux kernel image for version 3.13.0 on 64 bit x86 SMP |
| ii | linux-image-3.13.0-30-generic | 3.13.0-30.55 | amd64 | Linux kernel image for version 3.13.0 on 64 bit x86 SMP |
| ii | linux-image-3.13.0-32-generic | 3.13.0-32.57 | amd64 | Linux kernel image for version 3.13.0 on 64 bit x86 SMP |
| rc | linux-image-extra-3.13.0-24-generic | 3.13.0-24.47 | amd64 | Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP |
| ii | linux-image-extra-3.13.0-30-generic | 3.13.0-30.55 | amd64 | Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP |
| ii | linux-image-extra-3.13.0-32-generic | 3.13.0-32.57 | amd64 | Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP |
| ii | linux-image-generic | 3.13.0.32.38 | amd64 | Generic Linux kernel image |
Delete kernels
Automatic deletion
# list the package to remove
dpkg -l | awk '{print $2}' | grep -E "linux-(image|headers)-$(uname -r | cut -d- -f1).*" | grep -v $(uname -r | sed -r -e 's:-[a-z]+.*::')
# remove all old kernels at once
apt-get purge $(dpkg -l | awk '{print $2}' | grep -E "linux-(image|headers)-$(uname -r | cut -d- -f1).*" | grep -v $(uname -r | sed -r -e 's:-[a-z]+.*::'))
# update grub
update-grubSource: Linux pratique no94, FR, mars|avril 2016
Manual deletion
Delete the kernels you don't want/need anymore
# Remove old kernels (repeat for each version)
OLD_KRNL_VERSION=4.4.0-21
apt-get remove --purge linux-headers-${OLD_KRNL_VERSION}* linux-image-${OLD_KRNL_VERSION}* linux-image-extra-${OLD_KRNL_VERSION}*
# at the end update Grub
update-grubset OLD_KRNL_VERSION to the version of the kernel you want to remove.
