I'm willing to use Computer Janitor but I'm afraid to lose some important libraries.
Is it secure to use Computer Janitor?
Thanks in advance.
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up.Sign up to join this community
Computer Janitor is being dropped in the next version of Ubuntu - mainly because nobody used it and the serious perceived issues that it could break your system with some of its suggestions.
I would recommend you take a closer look at either Ubuntu Tweak (from here) or Bleachbit (from software centre)
There is an AU question here with regards to Ubuntu Tweak.
I haven't found a similar question for BleachBit - but this AU question may help.