ssh-keygen
Check for SSH keys
cd ~/.ssh
RSA
ssh-keygen -t rsa
DSA
ssh-keygen -t dsa
More bits
ssh-keygen -b 4096
Key file
ssh-keygen -b 4096 -t rsa -f general
Comment
ssh-keygen -t rsa -C "mail@example.com"
Copy to clipboard
sudo apt-get install xclip
xclip -sel clip > ~/.ssh/id_rsa.pub