Ubuntu Notes

debsums

debsums is a useful utility to validate packages in a ubuntu or debian system.

Usage:

sudo debsums -c

If this identifies any problems you can fix them using.:

sudo apt install --reinstall <package name>

If debsums idenfifies several packages with issues, to fix all of them use:

sudo apt install --reinstall $(dpkg -S $(debsums -c) | cut -d : -f 1 | sort -u)

For more information there is a useful post about debsums on askubuntu