How can I force `vagrant ssh` to do pseudo-tty allocation?

Question

The first thing I do after vagrant ssh is usually attaching to a tmux session.

I want to automate this, so I try: vagrant ssh -c \"tm

Answer 1

According to this documentation, you should try adding -- to the command.
As I have not used vagrant, I am unsure of the formatting, but assume it would be similar to:

vagrant ssh -- -t

Unless, you need to include the username and host, in which case add the username and host.