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Full Discussion: Unable to loop with ssh
Top Forums Shell Programming and Scripting Unable to loop with ssh Post 303025866 by stomp on Wednesday 14th of November 2018 06:31:29 AM
Old 11-14-2018
That may sounds strange, but as matter of fact: ssh eats your loop arguments here. This specific implementation of a loop does not work with an ssh-command involved. Use a method like this instead:


Code:
for line in $(cat "$1"); do
          echo "Text read from file: $line"
       ssh user1@$line "df -h; kstat cpu_info|grep core_id|sort -u|wc -l"

done

This way the whole arguments are read at the begin of the loop and ssh is prevented from slurping up whole stdin.

Last edited by stomp; 11-14-2018 at 08:11 AM.. Reason: fixed syntax error
 

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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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