Package: ruby2.1

"ruby2.1" package binaries on Debian:

/usr/bin/erb2.1 /usr/bin/gem2.1 /usr/bin/irb2.1 /usr/bin/rake2.1 /usr/bin/rdoc2.1 /usr/bin/ri2.1 /usr/bin/ruby2.1 /usr/bin/testrb2.1

You may install this package on Debian with apt-get install ruby2.1