Frustrated with ruby install

Following:
http://www.andrehonsberg.com/article/install-rvm-ubuntu-1204-linux-for-ruby-193

but when I do
type rvm | head -1

it says:
rvm is /home/user/.rvm/bin/rvm

but expected is:
rvm is a function,

So if,

I do:
rvm use --default 1.8.7

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.

My goal is to install ruby 1.8.7 on ubuntu, actually I crashed previous
install so I uninstalled and trying to reinstall,-- am fighting very
hard to do it.

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