tmux: Instantly Updating Pane Title to Match Terminal Output

Tmux: Instantly Updating Pane Title to Match Terminal Output

Tmux is a powerful terminal multiplexer that allows you to run multiple terminal sessions within a single window. One of the many useful features of Tmux is the ability to customize the pane title to display relevant information about the current session. In this article, we will cover how to instantly update the pane title to match the currently executed terminal command or shell title.

The Basics of Tmux Pane Titles

By default, Tmux displays the name of the session, window, and pane in the title bar. However, you can customize the title of each pane to display any text you want. This can be useful for keeping track of multiple terminal sessions and commands.

To set the pane title in Tmux, you can use the title command followed by the text you want to display. For example, the following command will set the pane title to "My Custom Title":

You can also use the % and # symbols to insert the window and pane index into the title. For example, the following command will set the pane title to "Window #: Pane #":

Instantly Updating the Pane Title

While the title command is useful for setting a static pane title, it does not update the title automatically when the terminal output changes. To achieve this, we can use the watch command in combination with the sed command to periodically update the pane title.

The watch command allows you to run a command repeatedly at a specified interval. In this case, we will use it to run the ps command every second to retrieve the current terminal command. The sed command will then extract the command name and set it as the pane title.

Here is an example of how to use the watch and sed commands to update the pane title:

In this example, the ps command retrieves the current terminal command, the sed command extracts the command name, and the tmux command updates the pane title. The watch command runs this entire pipeline every second to keep the pane title up-to-date with the current terminal command.

Matching the Terminal Output

The previous example updates the pane title to match the currently executed terminal command. However, it does not match the terminal output itself. To achieve this, we can use the awk command to extract the relevant information from the terminal output and set it as the pane title.

Here is an example of how to use the awk command to extract the current Git branch name and set it as the pane title:

In this example, the git branch command retrieves the list of Git branches, the grep command extracts the current branch, and the cut command extracts the branch name. The tmux command then updates the pane title with the extracted branch name.

Tmux is a powerful terminal multiplexer that allows you to run multiple terminal sessions within a single window. By customizing the pane title, you can keep track of multiple terminal sessions and commands. In this article, we covered how to instantly update the pane title to match the currently executed terminal command or shell title. With the watch, sed, and awk commands, you can extract relevant information from the terminal output and set it as the pane title.

• Tmux allows you to run multiple terminal sessions within a single window
• Customizing the pane title can help you keep track of multiple terminal sessions and commands
• The watch, sed, and awk commands can be used to extract relevant information from the terminal output and set it as the pane title

References

• watch command manual
• sed command manual
• awk command manual
• Tmux documentation