Starting a service at startup.
 

Hi guys I want to start a service and a script SiteMonitor.sh at startup.

Here is brief working of SiteMonitor.sh
(This script monitors the ip addresses of machines which are using http service of the host.
This script checks this after every 5 seconds therefore i have run it at background.
)
To start with i have modified /etc/rc.local file.

Here is the content of my /etc/rc.local file.

My problem is after i restart the machine only SiteMonitor.sh script get
executed but the command service httpd start doesnt .Therefore i have to manually login to the system and fire service httpd start to start apache.

I would also like to know whether the script SiteMonitor.sh is running or not?
How would i do that?

Normally you set it on using the chkconfig cmd http://linux.die.net/man/8/chkconfig or the equiv. You don't need an entry in/etc/rc.local.

are you referring script or service or both?
What should be the runlevel for apache service?
What should be start and end priority?

The reason i m using rc.local file is beacause one of our senior member has suggested that in following thread.
http://www.linuxquestions.org/questions/linux-newbie-8/need-to-run-script-at-startup-786850/

Say, SiteMonitor.sh is under /opt/ directory.

Just browse to :

#vi /etc/rc.local

And add:

sh /opt/SiteMonitor.sh at the last line

Save it.

Note: Make sure the script has executable permission.

Hi,

Please check the following link. Monit will do exactly what you need.

http://mmonit.com/monit/

To start the http service, at boot time,

This shows on my runlevel (3), the http service is off by default.

Now i am changing the httpd to be started by default in my runlevel

Verifying.

That was not my question.
My SiteMonitor.sh Script ran successfully at background I just wanted to know How would i determine whether the script is running or not.
May be using ps -ef (or something like this).


I have copied SiteMonitor.sh to /usr/local/sbin/ which is in my $PATH
I just added following line to /etc/rc.local file
Is there anything wrong here ?

If that the condition then it should go fine.
ps -ef can fetch you the process.Thats true.

That was not my question.

I have ran SiteMonitor.sh in background .
usingcommand.

Now if i want to see whether the script is running or not ,How would i go about it?

It is giving me an error saying bad syntax
# ps -aux | grep SiteMonitor.sh

ps -ef | grep SiteMonitor.sh

Again not what i want to see.
As the process is started with SiteMonitor.sh &
there must be something that will be available to see the status.

Hi

As per above you want to see if your script is running or not.

The previous command that you ran (ps -ef | grep sitemonitor.sh) basically will show you whether your script has been spawned as a process or not - thus if you don't see your script with a process ID it means that its not running.

Cheers
Yas

Script was running When i executed the command .I dont know why it was not showing up in ps -ef.
I think for listing the processes started with & at the end there must be something else .

Hi

Yes - you're quite right. When you run the script with the ampersand (&) at the end the script is run in the background in a sub-shell.

Here's how you see whether your script is running or not:

Basically, when you issue the echo$! it will show you your background process - and then you can use ps for that PID to be able to see the state of your process.

I suggest you read the bash man page which gives a bit of insight into this.

Cheers
Yas