Step 1: Login as root user
avinash@avinash-Z500:$ sudo su
Step 2: Issue the following command to install RVM(Ruby Version Manager) using curl
avinash# bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)
Step 3: run the following command to add a line to the bashrc file
# echo '[[ -s "/home/avinash/.rvm/scripts/rvm" ]] && source "/home/avinash/.rvm/scripts/rvm"' >> ~/.bashrc
In the above command change the name avinash into your pc username
Step 4 : run the command to check whether the above line was added to bashrc file or not
# nano ~/.bashrc
Step 5: run this command
# source ~/.bashrc
Step 6: If the output of the below command shows rvm is a function,then we have a working rvm installed.
# type rvm | head -1
Step 7: run this command to install ruby 1.9.3
# rvm install 1.9.3
Step 8: run this command to make ruby 1.9.3 as default
# rvm use --default 1.9.3