when I try "sudo gem install rubocop", I get...
Building native extensions. This could take a while... ERROR: Error installing rubocop: ERROR: Failed to build gem native extension. current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.1/ext /usr/bin/ruby2.3 mkrf_conf.rb current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.1/ext /usr/bin/ruby2.3 -rubygems /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake RUBYARCHDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.1 RUBYLIBDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.1 /usr/bin/ruby2.3: No such file or directory -- /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake (LoadError) rake failed, exit code 1 Gem files will remain installed in /var/lib/gems/2.3.0/gems/rainbow-2.2.1 for inspection. Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.1/gem_make.out
So I have tried a number of solutions, specifically those from https://stackoverflow.com/questions/22544754/failed-to-build-gem-native-extension-installing-compass (different gem, same error)
I tried reinstalling RVM with "rvm reinstall --disable-binary 2.2.0" which took a while but didn't fix it
next i tried $ "sudo apt-get install ruby-dev" which yields
Reading package lists... Done Building dependency tree Reading state information... Done ruby-dev is already the newest version (1:2.3.0+1). The following packages were automatically installed and are no longer required: dkms linux-headers-4.4.0-53 linux-headers-4.4.0-53-generic linux-image-4.4.0-53-generic linux-image-extra-4.4.0-53-generic python-appindicator python-gconf python-gi python-glade2 python-gobject python-pexpect python-ptyprocess python-xdg Use 'sudo apt autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 40 not upgraded.
I've also tried "gem update --system" to which I get...
Latest version currently installed. Aborting.
Any suggestions will be greatly appreciated as I am a total noob and I'm stuck.