GNU/Linux CentOS RVM Manage Multiples Rubies Versions Guide
Installing Rvm
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2. Installing RVM
Install the Ruby Version Manager
Linux How to Install RVM -
3. Installing Dependencies
Check/Install Git
Simply with:which git
Possibly to Install Git:
sudo yum install git
Check/Install Patch
Again with:which patch
Possibly to Install Patch:
sudo yum install patch