tmux/Q/How can I enable vi keys for everything in tmux from the command prompt without editing the config?

• How can I enable vim keys for everything in tmux from the tmux/Command/Prompt without editing the config? card

  • tmux/Command/Prompt (Prefix :)
    • set -g mode-keys vi
      • sets vi controls in tmux/Option/mode-keys (scrolling, search, text selection)
    • set -g status-keys vi
      • sets vi controls in tmux/Option/status-keys (tmux/Command/Prompt, rename prompt, search prompts)
    • these are runtime-only; it will be gone again after tmux kill-server

  • AI Answer

    • Short answer: Press Prefix : and run set -g mode-keys vi, then repeat for set -g status-keys vi. Two commands, done. Changes are runtime-only—they vanish after tmux kill-server.

    • The two options

      • tmux/Option/mode-keys — controls tmux/Mode/Copy, scrolling, search, and text selection. Default is emacs.
      • tmux/Option/status-keys — controls the tmux/Command/Prompt (Prefix :, rename prompts, search prompts). Default is emacs unless $VISUAL or $EDITOR contains vi.

    • Steps at the command prompt

      • 1. Prefix : → type set -g mode-keys vi → Enter
      • 2. Prefix : → type set -g status-keys vi → Enter
      • Both options accept vi or emacs. The -g flag applies the change globally (all sessions on the current server) without writing to any file.

    • From the shell (outside tmux)

      • sh

        tmux set -g mode-keys vi && tmux set -g status-keys vi

      • Useful when you want to script it or apply it before attaching.

    • Persistence caveat

      • These commands change the running tmux server; they do not touch ~/.tmux.conf. The settings disappear when the server stops (tmux kill-server or system reboot). To make them permanent, add the same two set -g lines to your config and reload with Prefix r (or tmux source-file ~/.tmux.conf).