You can’t use tmux to connect to a serial console.
You have a few options:
- minicom
- screen (from epel)
- putty (from epel)
[root@xmpp01 ~]# dnf list minicom putty screen
Last metadata expiration check: 3:50:50 ago on Sun 13 Apr 2025 04:43:03 PM MST.
Available Packages
minicom.x86_64 2.7.1-17.el9 baseos
putty.x86_64 0.81-1.el9 epel
screen.x86_64 4.8.0-6.el9 epel
To enable EPEL:
% dnf install epel-release
% crb enable
And then you can install screen or putty if those are what you need.