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Top Forums Shell Programming and Scripting Shell script using expect to login to couple of remote servers and read "crontab -l" Post 302781145 by verdepollo on Friday 15th of March 2013 03:39:32 PM
Old 03-15-2013
Using key authentication would probably be a better idea than expect as it's easier and much more secure.

Something along these lines:
Code:
for server in server1 server2 server3 
do
     ssh username@$server -C "crontab -l someuser" >> cron.log
     ssh username@$server -C "cat /etc/rc.local" >> rc.local.log
     ssh username@$server -C "other commands" >> stuff.log
done

You'll be creating three connections per server however, but there's no way that I'm aware of to redirect the output to three different files locally within a single connection, unless you redirect the whole output to a single file and then do some post-processing work with awk/sed/perl/etc.
 

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CRON(8) 						      System Manager's Manual							   CRON(8)

NAME
cron - daemon to execute scheduled commands (Vixie Cron) SYNOPSIS
cron DESCRIPTION
Cron should be started from /etc/rc or /etc/rc.local. It will return immediately, so you don't need to start it with '&'. Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory. Cron also searches for /etc/crontab and the files in the /etc/cron.d/ directory, which are in a different format (see crontab(5)). Cron then wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute. When execut- ing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab, if such exists). Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has, cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted whenever a crontab file is modified. Note that the Crontab(1) command updates the modtime of the spool directory whenever it changes a crontab. SEE ALSO
crontab(1), crontab(5) AUTHOR
Paul Vixie <paul@vix.com> 4th Berkeley Distribution 20 December 1993 CRON(8)
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