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Full Discussion: Running Shell Script in the cron, background process
Top Forums Shell Programming and Scripting Running Shell Script in the cron, background process Post 302570667 by michaelrozar17 on Friday 4th of November 2011 04:05:49 AM
Old 11-04-2011
Unless you give the required command's path (ex. oracle home,java home etc) in .profile file, this file would not help in running cron. So if you want to run a script through cron, give full path in the script for external commands (sqlplus,java etc) and files/logs you want create while running script. In case you want to store a value from a file, which you have already created, we could try as
Code:
FILE_VALUE=$(cat temp_file.txt) # stores content of temp_file.txt to variable FILE_VALUE

The above would work if you run the script manually as most of the time we will save the file in the same location where we save the script. If the same needs to run in cron, the shell would not be able to find this .txt file as cron by default to my knowledge will run the script from the user's home directory. Hence the work around would be
Code:
FILE_VALUE=$(cat /full/path/to/temp_file.txt)

Similarly its the case of other commands which are not shell bulit-in.
 

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LEARN ABOUT DEBIAN

apticron

apticron(1)						      General Commands Manual						       apticron(1)

NAME

       apticron - Generate a mail listing packages which are pending an upgrade

SYNOPSIS

       apticron [--cron]

DESCRIPTION

       apticron is a shell script which generates a mail with a list of all packages currently pending an upgrade, as well as summary of changes -
       using apt-listchanges - to a configurable Email address.

       apticron is mainly intended for automatic notification of pending security updates but can also be used	in  many  other  situations  where
       timely updates are necessary.

       The --cron option is only meant to be used when invoked by cron in order to run no more than once a day.

FILES

       /etc/apticron/apticron.conf
	      Configuration file, Email address to mail and profile for use with apt-listchanges are configurable.

       /etc/cron.d/apticron
	      Cron job for executing apticron daily.

       /etc/cron.daily/apticron
	      Fallback cron script for executing apticron (if no crond running or system down at designated time).

       /var/lib/misc/apticron.cron
	      Time stamp file used by apticron when invoked with --cron option.

SEE ALSO

       apt-get(8), apt-listchanges(1), cron(8)

AUTHOR

       Apticron  was initially developed by Colm MacCarthaigh <colm.maccarthaigh@heanet.ie> with contributions from Marc Sherman <msherman@projec-
       tile.ca>. Since 2006 it is maintained and improved by Tiago Bortoletto Vaz <tiago@debian.org>.

																       apticron(1)
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