What is the script of do-release-upgrade

**tomhsiung** · June 10th, 2021

Hello, everyone

Due to some reason, my do-release-upgrade process was interrupted and I was not able to execute the `[COLOR=var(--black-800)]Remove obsolete packages? [/COLOR]` step.

So does anyone know the script of that step? Just want to remove the obsolete packages after upgrading. Thanks

Tom

PS: So far I had done this,

Code:

sudo -i

apt-get update
apt-get autoremove
apt-get clean
 
UNUSCONF=$(dpkg -l|grep "^rc" | awk '{print $2}')
apt-get remove --purge $UNUSCONF


NEWKERNEL=$(uname -r|sed 's/-*[a-z]//g'|sed 's/-386//g')


ADDKERNEL="linux-(image|headers|ubuntu-modules|restricted-modules)"


METAKERNEL="linux-(image|headers|restricted-modules)-(generic|i386|server|common|rt|xen)"


UNUSKERNELS=$(dpkg -l | awk '{print $2}' | grep -E $ADDKERNEL | grep -vE $METAKERNEL | grep -v $NEWKERNEL)


apt-get remove --purge $UNUSKERNELS


update-grub

**MAFoElffen** · June 10th, 2021

Originally Posted by tomhsiung

Due to some reason, my do-release-upgrade process was interrupted... Just want to remove the obsolete packages after upgrading.

The first 5 lines of your "PS" code:

Code:

sudo -i


apt-get update
apt-get autoremove
apt-get clean

...should have removed "obsolete packages." if you think you have more there, you can generate a list of obsolete packages via:

Code:

apt-show-versions | grep 'No available version'

But saying that you had an interupted Apt process, you might also do:

Code:

sudo apt-get install -f

...to fix any broken packages caused by that interruption.

**tomhsiung** · June 11th, 2021

Thank you, pal. Yes, I had upgraded successfully. And I just want to know the script of the do-release-upgrade program for removing the obsolete packages.