06-14-2008
Script that Redirect SSH output via cron
Hi,
I have a script that's being called via a crontab which is a wrapper script that creates a log for the script that gets executed. Within the script that gets executed, it also run's subscripts. I've been able to get everything to work .. but the issue is one of the subscript that goes out and does a set of remote ssh connections to run a local script on servers, the output currently is being re-directed back to a file local to the system of execution, the problem is when the cron run's I know the output is being generated but it does not redirect to the local file. The file gets generated but they're all blank. I've tried to troubleshoot each script at a time and if I run the wrapper script manually, everything works, but when cron executes the script outputs these 0byte files.
I've tried:
ssh root@$i /tmp/subscript.sh >> /local/file
ssh -n root@$i /tmp/subscript.sh >> /local/file
ssh root@$i /tmp/subscript.sh &> /local/file
ssh root@$i /tmp/subscript.sh > /local/file 2>&1
I've tried many different method but I've just been left with manually running the wrapper script few times out of the day vs. having it automated.
I don't know how else I could troubleshoot or figure a way to re-direct the output from the remote ssh connection back to a local file that works under a crontab?? Any suggestions?
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LEARN ABOUT MINIX
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