ssh "!command" escape sequence - does it work?
Colin Watson
cjwatson at ubuntu.com
Thu Sep 10 15:28:56 UTC 2020
On Thu, Sep 10, 2020 at 03:19:19PM +0100, Chris Green wrote:
> In the man page for ssh_config it says:-
>
> PermitLocalCommand
> Allow local command execution via the LocalCommand option or using the !command escape sequence in
> ssh(1). The argument must be yes or no (the default).
>
> Can anyone point me at something that tells me about "... the !command
> escape sequence in ssh(1)" please.
Here's the relevant bit of documentation from that manual page. Does
this help?
ESCAPE CHARACTERS
When a pseudo-terminal has been requested, ssh supports a number of
functions 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
character can be changed in configuration files using the EscapeChar
configuration directive or on the command line by the -e option.
The supported escapes (assuming the default ‘~’) are:
[...]
~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[bind_address:]port for local, -KR[bind_address:]port for
remote and -KD[bind_address:]port for dynamic port-forwardings.
!command allows the user to execute a local command if the
PermitLocalCommand option is enabled in ssh_config(5). Basic
help is available, using the -h option.
--
Colin Watson (he/him) [cjwatson at ubuntu.com]
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