free up space on ubuntu

[Stevyn]

https://www.omgubuntu.co.uk/2016/08/5-w ... -on-ubuntu



comment by gabdub •
I use this small script in all my machines. I called it "uac" = Update And Clean.
This removes old kernels but keep the last one to go back if something goes wrong with the update.

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#!/bin/bash
sudo apt update
sudo apt upgrade
sudo apt-get clean
sudo apt-get autoclean
sudo apt-get autoremove
dpkg -l | grep '^rc' | awk '{print $2}' > config_list.txt
if [ -s config_list.txt ]
then
sudo xargs dpkg --purge < config_list.txt
fi
if [ -f /var/run/reboot-required ]; then
echo '**** reboot required ****'
fi

[Stevyn]

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df -h

will show you disk space used by boot partition, etc

[Stevyn]

1. Check the current kernel version

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$ uname -r 

It will shows the list like below:

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3.19.0-64-generic

2. Remove the OLD kernels
2.a. List the old kernel

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$ sudo dpkg --list 'linux-image*'|awk '{ if ($1=="ii") print $2}'|grep -v `uname -r`

You will get the list of images something like below:

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linux-image-3.19.0-25-generic
linux-image-3.19.0-56-generic
linux-image-3.19.0-58-generic
linux-image-3.19.0-59-generic
linux-image-3.19.0-61-generic
linux-image-3.19.0-65-generic
linux-image-extra-3.19.0-25-generic
linux-image-extra-3.19.0-56-generic
linux-image-extra-3.19.0-58-generic
linux-image-extra-3.19.0-59-generic
linux-image-extra-3.19.0-61-generic

2.b. Now its time to remove old kernel one by one as

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$ sudo apt-get purge linux-image-3.19.0-25-generic
$ sudo apt-get purge linux-image-3.19.0-56-generic
$ sudo apt-get purge linux-image-3.19.0-58-generic
$ sudo apt-get purge linux-image-3.19.0-59-generic
$ sudo apt-get purge linux-image-3.19.0-61-generic
$ sudo apt-get purge linux-image-3.19.0-65-generic

When you're done removing the older kernels, you can run this to remove ever packages you won't need anymore:

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$ sudo apt-get autoremove

And finally you can run this to update grub kernel list:

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$ sudo update-grub