Exercise: Create your own script for your default run-level

Write a short script that says "hello" and have it execute at run-level 4.
Remember the actual script will live in the /etc/rc.d/init.d directory, but you will put symbolic links into the appropriate run-level directory.
Use the init command to bring your machine to run-level 4.
Have your script echo "hello Yourname" when you go to run-level 4 (replace Yourname with your own name in the script below).
To display the xclock, you will need to replace ponto (in the script below) with the name of your system.

Example Script

#!/bin/sh
# Startup script for myprog
#

prog="myprog"
XCLOCK=/usr/X11R6/bin/xclock

[ -f $XCLOCK ] || exit 0

start() {
    echo -n $"Starting $prog: "
         $XCLOCK -display ponto:0.0 &
    echo "Hello Patty"
    RETVAL=$?
    echo
    return $RETVAL
}

stop() {
   echo -n $"Stopping $prog: "
   kill `ps -ef | grep xclock | grep -v grep | awk '{print $2}'`
   echo "Goodbye Patty"
   RETVAL=$?
   echo
   return $RETVAL
}

case "$1" in
        start)
            start
            ;;

        stop)
            stop
            ;;
        *)
            echo $"Usage: $0 {start|stop}"
            exit 1

esac
exit 0

Make your script executable:

# chmod +x myprog

Test your script from /etc/rc.d/init.d:

# ./myprog start
# ./myprog stop

Now create symbolic links in /etc/rc.d/rc4.d to start your script

# cd /etc/rc.d/rc4.d
# ln -s ../init.d/myprog S99myprog

In order to see your program's messages you must be able to view the console.
The clock should appear on your X desktop.

You can also see process startup and shutdown messages in your system log file, /var/log/messages.
Tail this file in another window if you are running X while you change run-levels in the first window:

# tail -f /var/log/messages

Did you see your program get exectued when you changed run-levels?

Examine the /etc/inittab script and find the line which executes rc.sysinit.

Write it down:____________________________________________________
Explain each of the 4 fields.

To find the current and previous run-level:

# runlevel

To change to run-level 4:

# telinit 4
or
# init 4