I am getting error when trying to set the default rubt:

kirti@kirti-Aspire-5733Z:~$ rvm list

rvm rubies

   ruby-2.0.0-p195 [ i686 ]
=* ruby-2.0.0-p247 [ i686 ]

# => - current
# =* - current && default
#  * - default

kirti@kirti-Aspire-5733Z:~$ rvm --default use ruby-2.0.0-p195

RVM is not a function, selecting rubies with 'rvm use ...' will not 
work.

You need to change your terminal emulator preferences to allow login 
shell.
Sometimes it is required to use `/bin/bash --login` as the command.
Please visit https://rvm.io/integration/gnome-terminal/ for a example.

kirti@kirti-Aspire-5733Z:~$ rvm --default use 2.0.0-p195

RVM is not a function, selecting rubies with 'rvm use ...' will not 
work.

You need to change your terminal emulator preferences to allow login 
shell.
Sometimes it is required to use `/bin/bash --login` as the command.
Please visit https://rvm.io/integration/gnome-terminal/ for a example.

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