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Full Discussion: Assistance with testing ssh connections and what the return codes mean
Top Forums UNIX for Beginners Questions & Answers Assistance with testing ssh connections and what the return codes mean Post 303040365 by greavette on Sunday 27th of October 2019 10:55:23 PM
Old 10-27-2019
Assistance with testing ssh connections and what the return codes mean
Hello Forum,

I'm using a bit of code from a script I found that allows me to capture the status code of connecting via SSH to remote servers:

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

When I echo out the status codes I can see codes such as the following:

Code:
0 - Success
255 - Error Can't login (not sure why though)
1 - Password Expired

The reasons for each I've gathered from my own experience and from notes in the script I'm using that listed these reasons. But could someone point me to documentation that would help me identify more definitively what the reason codes mean when I connect through SSH and get a return code.

Thank you.
 

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LEARN ABOUT X11R4

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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