eval ssh-agent -s
-ash: ssh-agent: not found

ssh-keygen: not found also

How to add public key for when you want omega to recognize the machine with which you log into it (and avoid typing in your credentials every time you ssh).

How to generate an ssh key on the omega:

mkdir ~/.ssh  
dropbearkey -t rsa -f ~/.ssh/id_rsa      
dropbearkey -y -f ~/.ssh/id_rsa | sed -n 2p > ~/.ssh/id_rsa.pub

... this is useful if you'd like to authorize the onion's access to a repository for instance (by sharing the .pub file).

<Note : I've only tested the above on the omega 2+.>