Apt tips and tricks

Only upgrade specific package

sudo apt-get install --only-upgrade <packagename>

Show holding package

apt-mark showhold

Remove old kernel

One of the best and simple way from this thead

#list up all the current kernels you have on a file.
$dpkg --list | egrep -i --color 'linux-image|linux-headers|linux-modules' | awk '{ print $2 }' > kernels.txt

#Filter your currently used kernel out of the file using grep.
$grep -v $(uname -r) kernels.txt > kernels_to_delete.txt

#Verify your current kernel is not present in the delete list. Don't skip this. Ensures you don't mistakenly delete all the kernels.
grep $(uname -r) kernels_to_delete.txt

#Delete all the unused kernels in one go.
$cat kernels_to_delete.txt | xargs sudo apt purge -y

Practical dpkg Command

dpkg has many options to run and this page describes most practical dpkg commands