Why are random letters inserted in my tmux session?

Is there a way to have tmux use the current virtualenv when I create a new window?

• Let's say I'm in a Python virtualenv at the moment, and I do 'PREFIX c' to create a new window. Or I actually create a new tmux session while I have a virtualenv activated. Is there any way to have the current virtualenv be activated in that new window/session?

• Answer:

  Damn, I actually figured it out immediately after posting the question :) It turns out the problem was in my .zshrc. I do 'workon default' when I launch a new shell, but that'll override my current virtualenv. So I added: if [ -n "$VIRTUAL_ENV" ]; then   . "$VIRTUAL_ENV/bin/activate" else   workon default fi Problem solved. This is possible because tmux windows get the environment of the shell that originally launched tmux (if I understand correctly).