The most comfortably I ever saw a person wield the telnet/rsh/ssh escape sequences was when I was an intern, visiting a Cray division, to port some software. He was juggling multiple hops, to get to a machine across the room, with the panels off.
I'm guessing that juggling multiple hops might've been ordinary in Internet-based supercomputing center practice at the time. Including through terminal servers?
(I ended up creating some multi-hop-to-go-10-feet situations myself at that company, such as for crudely gatewaying from our main Sun-dominated engineering LAN, to some porting systems, such as VAXstations that were only on DECnet. Half of the engineers had been developing things like LAN-accessed in-circuit emulators, borrowing other workstations' tape drives through rsh as part of a local Unix command pipeline, etc., so they were also unusually comfortable with the hops.)
If you are doing multiple hops, it’s good to know you can stack tildes to target a specific link in the chain. So if the second ssh connection is hung, you can press ~ ~ . to terminate that ssh connection, and not the first one.
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The most comfortably I ever saw a person wield the telnet/rsh/ssh escape sequences was when I was an intern, visiting a Cray division, to port some software. He was juggling multiple hops, to get to a machine across the room, with the panels off.
I'm guessing that juggling multiple hops might've been ordinary in Internet-based supercomputing center practice at the time. Including through terminal servers?
Though it would've been aesthetically cooler to sit at the console of a front-end processor of a Cray or Connection Machine. https://en.wikipedia.org/wiki/Maxell#/media/File:Blown_Away_...
(I ended up creating some multi-hop-to-go-10-feet situations myself at that company, such as for crudely gatewaying from our main Sun-dominated engineering LAN, to some porting systems, such as VAXstations that were only on DECnet. Half of the engineers had been developing things like LAN-accessed in-circuit emulators, borrowing other workstations' tape drives through rsh as part of a local Unix command pipeline, etc., so they were also unusually comfortable with the hops.)
If you are doing multiple hops, it’s good to know you can stack tildes to target a specific link in the chain. So if the second ssh connection is hung, you can press ~ ~ . to terminate that ssh connection, and not the first one.
See also: detaching from, or quitting a tmux/screen session.