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Top Forums Shell Programming and Scripting Shell Script Run Interval to be dynamic Post 90857 by Just Ice on Monday 28th of November 2005 11:53:00 AM
Old 11-28-2005
i was going to suggest a way to edit the crontabs but Perderabo's at solution might actually be better for your situation ... with a slight modification ...

to get your script to start automatically after booting up, create a script in /etc/rc3.d to do that for you ... please see other scripts in that directory for proper formatting and naming and also "man init" ...

... then go with Perderabo's script ...

doing so will allow you the flexibility to change the polling intervals as required without having to manually start the process after a reboot ...
 

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

NAME
service - run a System V init script SYNOPSIS
service SCRIPT COMMAND [OPTIONS] service --status-all service --help | -h | --version DESCRIPTION
service runs a System V init script or systemd unit in as predictable an environment as possible, removing most environment variables and with the current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT, or the name of a systemd unit. The existence of a systemd unit of the same name as a script in /etc/init.d will cause the unit to take precedence over the init.d script. The supported val- ues of COMMAND depend on the invoked script. service passes COMMAND and OPTIONS to the init script unmodified. For systemd units, start, stop, status, and reload are passed through to their systemctl/initctl equivalents. All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start command. service --status-all runs all init scripts, in alphabetical order, with the status command. The status is [ + ] for running services, [ - ] for stopped services and [ ? ] for services without a status command. This option only calls status for sysvinit jobs. EXIT CODES
service calls the init script and returns the status returned by it. FILES
/etc/init.d The directory containing System V init scripts. /{lib,run,etc}/systemd/system The directories containing systemd units. ENVIRONMENT
LANG, LANGUAGE, LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES, LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEA- SUREMENT, LC_IDENTIFICATION, LC_ALL, TERM, PATH The only environment variables passed to the init scripts. SEE ALSO
/etc/init.d/skeleton update-rc.d(8) init(8) invoke-rc.d(8) systemctl(1) AUTHOR
Miloslav Trmac <mitr@redhat.com>, Petter Reinholdtsen <pere@hungry.com> Licence: GNU Public Licence v2 (GPLv2) COPYRIGHT
2006 Red Hat, Inc., Petter Reinholdtsen <pere@hungry.com> Jan 206 SERVICE(8)
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