This is a tricky one to find, mainly because by default it doesn’t exist. You create your custom configuration file in your home directory in a hidden file like so:
~/.tmux.conf
…and add your desired configuration changes to that file. So, if you were the user bob, your config file would be located at:
/home/bob/.tmux.conf
Since it is a hidden file (prefixed with a period) you won’t see it on ls – you need to use:
ls -al
(or ls -a if you don’t like lists) to see it in the directory.
Opened one too many panes in tmux? You can kill one by selecting it and doing the following:
[prefix] x
By default the prefix is ctrl+b – so in this case you would enter ctrl+b then x.
Pane killed!
If you’re just starting out with tmux you may have installed it, set up a session, detached and then… what?
To re-join your detached session, simply run:
tmux attach
and you’re back in business.
If you’re used to screen you’ll be in the habit of using ctrl+a, for example detaching a session with ctrl+a then d – if you make the move to tmux it’s ctrl+b then d, which can take some getting used to. Often it’s easier to make tmux get used to you! To change tmux from ctrl+b to ctrl+a, make sure tmux isn’t running and create the following file:
vi ~/.tmux.conf
Here we have used the text editor vi to create the file. Now add the following:
unbind C-b
set -g prefix C-a
Save the file. Now the next time you start tmux it should have changed to what you’re used to!