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I'm trying to write a bash script which will setup my tmux environment automatically. Essentially what I need to do is:

  1. Copy .tmux.conf from my repo
  2. Clone https://github.com/tmux-plugins/tpm into ~/.tmux/plugins/tpm
  3. Run tmux
  4. Execute <Prefix>-I in the tmux session (for me prefix is Ctrl-B)

Steps 1-3 are quite simple, but I don't know how to send a key sequence in bash to a terminal.

EDIT

I tried running the following command:
tmux send-prefix -t 0; tmux send-keys -t 0 "I
but it didn't work. I got a following error:
I: command not found
.Any ideas on how to make it work?

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The action #4 in your list ("Execute <Prefix>-I in the tmux session") is setup by tpm to run one of the scripts(update_plugin.sh) installed by tpm.

As such, you can just just call this script as part of your deployment script, instead of trying to inject the keystroke to trigger it.

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