ctrl+c and ctrl-z not working in ssh session

I have opened a ssh session to remote computer using

ssh root@<ip>

I tried to run some program on remote machine. e.g.

tail -f /var/log/log.txt

But when i press ctrl-c or ctrl-z that program is not killed/suspended. I couldn't able to get control out of that process in terminal.

akshay

Posted 2017-01-06T11:18:17.863

Reputation: 121

@Bungicasse tried that now, still not able to kill – akshay – 2017-01-07T14:39:11.917

Does the tail -f continue to output data? It may be that the terminal session crashes (either some sort of remote timeout or pipe issue) – stuts – 2017-01-09T14:20:44.530

@stuts yes tail is still running. If i login to another session and kill tail, i can access the terminal – akshay – 2017-01-09T14:31:46.950

What OS are the source and destination systems? Does this problem effect all user accounts? I'm wondering if there could be a custom terminal/shell profile or something that overrides shortcuts on the destination system. – stuts – 2017-01-09T14:34:00.313

@stuts source is redhat linux and destination is QNX PPC. telnet session is working properly – akshay – 2017-01-09T14:42:25.323

What kind of system is the QNX PPC? Does it work when you try Ctrl-Break (the Pause/Break key)? Do the suspension/resume keys work (Ctrl-S & Ctrl-Q)? Do you have the latest version of the OS installed (may be a bug in a package)? Has the handler for ctrl-c been changed (see this forum post)?

– stuts – 2017-01-09T15:08:38.530

I am sure there is no change in signal handler, otherwise Ctrl-c in telnet session wouldn't have worked. also instead of tail this time i tried cat>newfile with Ctrl-c in ssh session, it is not working but working as expected in telnet session. @stuts – akshay – 2017-01-09T15:48:26.770

Do you provide any arguments to your ssh command? Could you try -t argument to ssh as this should forward the raw ctrl-c to the server. – stuts – 2017-01-09T15:54:59.800

@stuts ssh -t is also not working. One more thing i noticed is in terminal(ksh) if I press ctrl-c cursor moves and Ctrl-D close the session but in foreground process it is not taking the Ctrl-c or Ctrl-d – akshay – 2017-01-09T16:13:21.680

Is that on the client or the server? Do you see ^C print to the terminal? – stuts – 2017-01-09T16:20:42.230

I encounter the same issue. Now I have to using the following commands to terminate the tail process

ctrl - z then kill %1 – Ryan Lv – 2019-12-18T10:32:13.783

ctrl+c and ctrl-z not working in ssh session

No answers