You don't have write permissions into the /var/lib/gems/1.9.1 directory

8
votes

I got this error, for all gem that I try to install:

ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions into the /var/lib/gems/1.9.1 directory.

obs. I'm running on Ubuntu 14.

2
ruby-on-railsrubyrubygems

2 Answers

16
votes

According the question I see a few steps in order to allow writing to /var/lib/gems:

  1. Create gems (if not any) group, and add yourself to the group:

    $ groupadd -f gems
$ usermod -aG gems $(whoami)

  2. When reenter to the session:

    $ sudo -u $(whoami) bash

  3. Allow write for a gems group to /var/lib/gems/, and set the setgid bits:

    $ chown :gems /var/lib/gems/
$ chmod g+sw /var/lib/gems/

  4. Try installing gems into /var/lib/gems/.

NOTE: I strongly advice you to control rubies and gems via / keeping them in a local home folder. Please refer to the answer to know how to properly setup your project.

1
votes

Either run with sudo or if that doesn't work, try sudo chmod +w <file> (from terminal separately)