Break Sequence

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Supported escape sequences:. terminate connection (and any multiplexed sessions) B - send a BREAK to the remote system C - open a command line R - request rekey V/v - decrease/increase verbosity (LogLevel) ^Z - suspend ssh # - list forwarded connections & - background ssh (when waiting for connections to terminate) ? - this message - send the escape character by typing it. The break sequence doesn't work all that well - i.e., it's not instantaneous. It may take it a number of seconds after you type the break sequence before it actually stops the ping.

In a previous post Serial Console on OS X I wrote about how to connect a USB-Serial converter to console into Cisco router and use the ‘screen’ command.

To perform a password recovery on a Cisco router you need to issue a “terminal break” character to interrupt the boot process. The Cisco page on terminal break shows a lot of break sequences.


Break Sequence Putty

The break sequence for “screen” is to use Ctrl-A and then Ctrl-B. The Ctrl-A shifts the focus back to the screen process (away from the serial console) and the Ctrl-B issues the break sequence.

Break Sequence

Sequence Break Movie


Break Sequence Diagram

Break sequenceSequence

Break Sequence Cisco Router

You may need to break more than once. This is done by Ctrl-A, Ctrl-B, Ctrl-B, Ctrl-B.