IF condition failing in a SSH script Post: 302146279

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Top Forums Shell Programming and Scripting IF condition failing in a SSH script Post 302146279 by edcrosbys on Monday 19th of November 2007 11:08:35 PM

11-20-2007

Registered User

Quote:

Originally Posted by Lakris

I think that since ssh is non-interactive (not a controlling terminal) You can't have a terminal like session, either You must work with something like expect or keep the script locally and just "collect" whatever info

X100!!!

I've had this bite me before with some programs that want a terminal to send data too... Root get's email garbage then.

Quote:

And in general, is there a rule that I should keep in mind when executing a test condition in a remote machine thru a SSH script ?

Act like there is nowhere for it to read info from except local system variables, files and program output. I would usually use a script like this to cycle between many boxes If I want to interact with the script, I have my box do the control while the remote does the data gathering.

Like this:

ssh user@ubuntu "ls -l /test"
echo "Continue counting files starting with a`s ?"
read answer
if [ "$answer" = y ]
then
ssh user@ubuntu "ls -l a*"
fi

It's not as efficient with multple sign-ons, but the logic is all local. The only exception is if there is large amounts of data to filter out (with a grep or something) - I'll try and be nice to the network.

edcrosbys

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LEARN ABOUT LINUX

ssh-argv0

SSH-ARGV0(1)						    BSD General Commands Manual 					      SSH-ARGV0(1)

NAME

     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS

     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION

     ssh-argv0 replaces the old ssh command-name as hostname handling.	If you link to this script with a hostname then executing the link is
     equivalent to having executed ssh with that hostname as an argument.  All other arguments are passed to ssh and will be processed normally.

OPTIONS

     See ssh(1).

FILES

     See ssh(1).

AUTHORS

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
     Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH.  Markus Friedl contributed the support for SSH
     protocol versions 1.5 and 2.0.  Jonathan Amery wrote this ssh-argv0 script and the associated documentation.

SEE ALSO

     ssh(1)

Debian Project							 September 7, 2001						    Debian Project