Moxa V2616A-C8 [17/111] Cron daemon for executing scheduled commands

V2616A Linux Software Configuration

2-10

# Short-Description: tcps2

### END INIT INFO

. /lib/lsb/init-functions

export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"

case "$1" in

start)

start-stop-daemon --start --quiet --oknodo --pidfile /var/run/tcps2.pid --

exec

/usr/sbin/tcps2

;;

stop)

start-stop-daemon --stop --quiet --oknodo --pidfile /var/run/tcps2.pid

;;

esac

exit 0

Then add a service by insserv. If you want to add a service to be started at boot time, you can use:

moxa@Moxa:~# sudo insserv -v -d tcps2

Check the run level with the following command.

moxa@Moxa:~# ls -l /etc/rc?.d/*tcps*

lrwxrwxrwx 1 root root 15 Jul 6 09:40 /etc/rc2.d/S18tcps2 -> ../init.d/tcps2

lrwxrwxrwx 1 root root 15 Jul 6 09:40 /etc/rc3.d/S18tcps2 -> ../init.d/tcps2

lrwxrwxrwx 1 root root 15 Jul 6 09:40 /etc/rc4.d/S18tcps2 -> ../init.d/tcps2

lrwxrwxrwx 1 root root 15 Jul 6 09:40 /etc/rc5.d/S18tcps2 -> ../init.d/tcps2

moxa@Moxa:~#

If you want to remove a service from run-level, you can use this command:

moxa@Moxa:~# insserv -r tcps2

Check the run level removement with the following command.

moxa@Moxa:~# ls -l /etc/rc?.d/*tcps*

ls: cannot access /etc/rc?.d/*tcps*: No such file or directory

moxa@Moxa:~#

Cron—Daemon for Executing Scheduled

Commands

The Cron daemon will search /etc/crontab for crontab files.

Cron wakes up every minute and checks each command to see if it should be run at that time. When executing

commands, output is mailed to the owner of the crontab (or to the user named in the MAILTO environment

variable in the crontab, if such a user exists).

Modify the file /etc/crontab to set up your scheduled applications. Crontab files have the following format:

mm h dom mon dow user command

minute hour date month week user command

0-59 0-23 1-31 1-12 0-6 (0 is Sunday)

For example, issue the following command if you want to launch a program at 8:00 every day:

#minute hour date month dow user command