Assistance with testing ssh connections and what the return codes mean Post: 303040442

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Top Forums UNIX for Beginners Questions & Answers Assistance with testing ssh connections and what the return codes mean Post 303040442 by greavette on Tuesday 29th of October 2019 12:49:06 PM

10-29-2019

Registered User

Thanks again Chubler_XL for taking the time to reply to my post. We do have a plethora of versions still in use from RHEL 6.9 all they up to 7.7.

I did notice though on a system where I had to change the password...when I login manually I immediately get a message that the password has expired. Is there a way upon first connecting to a system via ssh to capture some reply back that may be used to identify the connection? Here's what I currently have in my script where I check my ssh connection and define a status code based on that initial connection:

Code:

ssh -qno StrictHostKeyChecking=no -o ConnectTimeout=1 user@$InputIP 'ls -l /home/user >/dev/null 2>&1' > /dev/null 2>&1
        status="$(echo $?)"
        echo $status

I then have defined in my script the following status based on the return code from $status above:

Code:

UNREACHABLE="255"
INVALID_PASSWORD="5"
NO_HOME_DIRECTORY="2"
PASSWORD_EXPIRED="1"
SUCCESS="0"

Does the above code look like this could work for me? Is there perhaps a better way to identify a password has expired on a system using our ID?

Thanks!

greavette

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LEARN ABOUT PHP

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

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