Nie masz uprawnień do zapisu w katalogu /var/lib/gems/2.3.0
Mam zainstalowany Ruby na moim Ubuntu 16.04. $which ruby /usr/bin/ruby $ruby -v ruby 2.3.0p0 (2015-12-25) [x86_64-linux-gnu] $gem install bundler ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /var/lib/gems/2.3.0 directory. Każda pomoc...