Here I don't go with less than 10GB on /usr and last time it was 100's of GB because we were writing apps on Linux. There is no exact answer.
I recently installed LinuxMint17. When partitioning HDD prior to install, the "partioner" stated it required 3.7Gb for /usr. After install and running "updates" got an error msg. indicating /usr needed more space. OK, not a problem, but just how much space does it need, or rather, what is sufficient space for /usr? PLEASE, explain your answer(i.e... why it needs x amount) [HP2000-210 LinuxMint17 80Gb HDD]