How to register your private key on the remote SSH server running on Linux

I've forgot which program from SSH toolchain does this (ssh-copy-id), and replaced it with my own method.

ssh-keygen -y -f ~/.ssh/id_dsa | ssh remote.org tee -a ~/.ssh/authorized_keys

~/.ssh/id_dsa should be replaced with your private key file.
remote.org - SSH sever address