I'm connecting through SSH from a machine where my keys are stored, forwarding to a second machine, and then try to use the keys from within tmux. I appear to "loose" the forwarding when entering tmux. How can "forward again" so that I can use my keys from within tmux?
$ ssh [server] -o ForwardAgent=yes $ git pull # Succeeds. $ /bin/bash $ git pull # Still succeeds, despite new shell. $ exit $ tmux attach $ git pull # Permission denied (publickey)