Ruby on Rails error - ruby-on-rails

Question

I really need some help, I am not a Ruby expert and I am trying to get an existing ruby app to run on my Ubuntu server.
I think I have done everything correctly but I keep on getting the following error:
Warning! PATH is not properly set up, $GEM_HOME is not set,
usually this is caused by shell initialization files - check
them for 'PATH=...' entries,
As well as
You are using '.rvmrc', it requires trusting, it is slower and it is
not compatible with other ruby managers,
you can switch to '.ruby-version' using 'rvm rvmrc to ruby-version'
Here is the output from rvm info:
rvm info
Warning! PATH is not properly set up, $GEM_HOME is not set,
usually this is caused by shell initialization files - check
them for 'PATH=...' entries, it might also help to re-add RVM
to your dotfiles: 'rvm get stable --auto-dotfiles',to fix
temporarily in this shell session run: 'rvm use ruby-2.2.1'.
system:
system:
uname: "Linux ip-172-31-22-20 3.13.0-83-generic #127-Ubuntu
SMP Fri Mar 11 00:25:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux"
system: "ubuntu/14.04/x86_64"
bash: "/bin/bash => GNU bash, version 4.3.11(1)-release (x86_64-pc-linux-gnu)"
zsh: " => not installed"
rvm:
version: "rvm 1.27.0 (latest) by Wayne E. Seguin <wayneeseguin#gmail.com>, Michal Papis <mpapis#gmail.com> [https://rvm.io/]"
updated: "1 hour 16 minutes 14 seconds ago"
path: "/usr/local/rvm"
homes:
gem: "not set"
ruby: "/usr/local/rvm/rubies/ruby-2.2.1"
binaries:
ruby: "/usr/local/rvm/rubies/ruby-2.2.1/bin/ruby"
irb: "/usr/local/rvm/rubies/ruby-2.2.1/bin/irb"
gem: "/usr/local/rvm/rubies/ruby-2.2.1/bin/gem"
rake: "/usr/local/rvm/rubies/ruby-2.2.1/bin/rake"
environment:
PATH: "/usr/local/rvm/gems/ruby-2.2.1/bin:/usr/local/rvm/gems/ruby-2.2.1#global/bin:/usr/local/rvm/rubies/ruby-2.2.1/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/rvm/bin"
GEM_HOME: ""
GEM_PATH: ""
MY_RUBY_HOME: "/usr/local/rvm/rubies/ruby-2.2.1"
IRBRC: "/usr/local/rvm/rubies/ruby-2.2.1/.irbrc"
RUBYOPT: ""
gemset: ""
THANKS!!!!
UPDATE
Thanks, I was able to set the GEM_HOME and GEM_PATH values by using:
export GEM_HOME=/usr/local/rvm/gems/ruby-2.2.1
export GEM_PATH=/usr/local/rvm/gems/ruby-2.2.1:/usr/local/rvm/gems/ruby-2.2.1#global
echo "source $HOME/.rvm/scripts/rvm" >> ~/.bash_profile
However when I change folders and go back, I get an error (see below) and the variables are no longer set.
You are using '.rvmrc', it requires trusting, it is slower and it is not compatible with other ruby managers,
you can switch to '.ruby-version' using 'rvm rvmrc to ruby-version'
or ignore this warning with 'rvm rvmrc warning ignore /var/www/XXXXX/MicoBackup/.rvmrc',
'.rvmrc' will continue to be the default project file in RVM 1 and RVM 2,
to ignore the warning for all files run 'rvm rvmrc warning ignore all.rvmrcs'.
Gemset 'XXXXXX' does not exist, 'rvm ree-1.8.7-2012.02 do rvm gemset create XXXXXX' first, or append '--create'.

Answer 1

Looks like a duplicate of: https://unix.stackexchange.com/questions/203376/how-to-set-ruby-gem-home-and-gem-path
As the error message indicates, you're missing GEM_HOME in your PATH.
Start by making sure rvm is properly sourced in your .bash_profile:
echo "source $HOME/.rvm/scripts/rvm" >> ~/.bash_profile
If that doesn't work, you can try setting GEM_HOME manually. See the provided link above.