Check if your ~/.profile
file contains:
PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting
and your .bash_profile
file contains:
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*
if it have it and still don't work add this line to your ~/.bash_profile
source ~/.profile
I'm assuming you are using bash as your shell. You may want to check it in your user preferences (depend on your distro).