SSH, les séquences d'échappement

Cela peut par exemple vous servir pour gérer ou retrouver vos tunnel.

Extrait du man :

 ESCAPE CHARACTERS
     When a pseudo-terminal has been requested, ssh supports a number of func-
     tions through the use of an escape character.

     A single tilde character can be sent as ~~ or by following the tilde by a
     character other than those described below.  The escape character must
     always follow a newline to be interpreted as special.  The escape charac-
     ter can be changed in configuration files using the EscapeChar configura-
     tion directive or on the command line by the -e option.

     The supported escapes (assuming the default `~') are:

     ~.      Disconnect.

     ~^Z     Background ssh.

     ~#      List forwarded connections.

     ~&      Background ssh at logout when waiting for forwarded connection /
             X11 sessions to terminate.

     ~?      Display a list of escape characters.

     ~B      Send a BREAK to the remote system (only useful for SSH protocol
             version 2 and if the peer supports it).

     ~C      Open command line.  Currently this allows the addition of port
             forwardings using the -L, -R and -D options (see above).  It also
             allows the cancellation of existing port-forwardings with
             -KL[<em>bind_address</em>:]<em>port</em> for local, -KR[<em>bind_address</em>:]<em>port</em> for re-
             mote and -KD[<em>bind_address</em>:]<em>port</em> for dynamic port-forwardings.
             !<em>command</em> allows the user to execute a local command if the
             PermitLocalCommand option is enabled in <a href="http://man.openbsd.org/">ssh_config(5)</a>.  Basic
             help is available, using the -h option.

     ~R      Request rekeying of the connection (only useful for SSH protocol
             version 2 and if the peer supports it).


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