When dealing with UNIXs like AIX, screen is the only choice. Plus I noticed it is a bit lighter than tmux. But there was one odd instance where I had a minor

When dealing with UNIXs like AIX, screen is the only choice. Plus I noticed it is a bit lighter than tmux. But there was one odd instance where I had a minor issue with screen, I forgot what it was. FWIW, tmux comes with NetBSD too, I suspect maybe it is there by default on FreeBSD too.