Master Multi-Session Management with Tmux: Install, Commands, and Tips

Introduction

Tmux is a free, open‑source terminal multiplexer that lets you run multiple sessions and applications inside a single terminal window. It works on Linux, BSD variants, and macOS, and uses Ctrl+b as the default command prefix (Screen uses Ctrl+a).

Installation

Tmux is available in the official repositories of most Linux distributions:

Arch Linux: $ sudo pacman -S tmux Debian/Ubuntu/Linux Mint: $ sudo apt-get install tmux Fedora: $ sudo dnf install tmux RHEL/CentOS: $ sudo yum install tmux openSUSE: $ sudo zypper install tmux After installation you can start exploring Tmux commands.

Basic Session Management

To create a new session and attach to it: tmux Or create a session without attaching: tmux new When inside a session you’ll see a green status bar at the bottom.

Detach from the current session with Ctrl+b d. The terminal will display: [detached (from session 0)] List all sessions:

tmux ls

To create a named session (e.g., for a web server):

tmux new -s webserver

Attach to the last created session: tmux attach Or attach to a specific named session: tmux attach -t ostechnix Kill a specific session: tmux kill-session -t ostechnix Kill all sessions (use with caution):

tmux kill-server

Pane Management

Split the window into panes (Tmux calls them “panes”).

Horizontal split: Ctrl+b " Vertical split:

Ctrl+b %

Switch between panes with Ctrl+b and the arrow keys, or cycle with Ctrl+b o. Show pane numbers using Ctrl+b q. Synchronize input across all panes: :setw synchronize-panes Resize or zoom a pane to full screen with Ctrl+b z. Close a pane by typing exit or Ctrl+b x and confirming with y.

Automation Tip

When working over SSH, start a Tmux session automatically to keep long‑running processes alive if the network drops. Adding tmux attach || tmux new to your shell’s login script is a common approach.

Summary

You now have the essential Tmux commands for multi‑session management, pane manipulation, and session automation. For more options, consult the manual page with man tmux.