Question: I installed the development packages for X11 today and now want to remove them. I do not remember the exact name of the package that I installed. I installed by running `apt-get install ...` and now want to remove the development package using `apt-get purge --auto-remove <name of package>`. Any suggestions?

Answer: 
If you installed them today, they’ll all be listed in `/var/log/apt/history.log`. Look through that, identify the packages you don’t want, and remove them.
Alternative: look at bash command history: `history`.

Future: use `equivs-control` to create a `.deb`, it makes it easier to un-install.