Ruby/Updating RubyGem on Debian-Ubuntu
From Debuntu
Rails requires RubyGems >= 1.3.1 (you have 1.2.0). Please `gem update --system` and try again.
But running:
$ sudo gem update --system
returns:
ERROR: While executing gem ... (RuntimeError)
gem update --system is disabled on Debian. RubyGems can be updated using the official Debian repositories by aptitude or apt-get.
The fix to this is to install the gem updater using:
$ sudo gem install rubygems-update $ sudo /var/lib/gems/1.8/bin/update_rubygems
On Debian Lenny I got the error
Could not find RubyGem builder while executing /var/lib/gems/1.8/bin/update_rubygems . This could be fixed by using version 1.3.4 of rubygems-update instead of version 1.3.5.
$ sudo gem uninstall rubygems-update --version=1.3.5 $ sudo gem install rubygems-update --version=1.3.4 $ sudo /var/lib/gems/1.8/bin/update_rubygems
