Greetings,

How would I go about having some shell scripts start up during a reboot of a Linux server? These shell scripts pertain to some applications and must startup with a different user rather than root user.

I was thinking of writing a script and have sysinit start it up during the reboot. However, I am not sure where to start.

Please help.

Thank you in advance.

J

Put the script at rc.local directory under /etc/init.d top directory.
that will make the script execute during the bootup.

WHat you need to do is :

1.) make a file under /etc/rc.d/init.d - example

" vi /etc/rc.d/init.d/filename "

In this file write or copy the script

2.) chmod 755 /etc/rc.d/init.d/filename "

This will make the file executable

3.) make a symbolic link to tell Linux to execute at startup

cd /etc/rc.d/rc3.d " - if your runlevel in runlevel 3

4.) while in /etc/rc.d/rc3.d do - ln -s ../init.d/filename S55FILENAME

that is it

Thank you for the quick respoonse!! I need do something like 'su -u user_name' to execute the the script?? I wouldn't want root to execute this script due to security reason.

Here's the command that I execute manually:
nohup ./agentscheduler.sh -port=9003 -name=THRASHER1_9003 &
nohup ./agent.sh -port=9004 -name=THRASHER1_9004 &

When I run the command above, I had to logged in as 'a_agent' user account to execute it.
if so, I do I incorporate that user in the script??

Thank you!!
J

I have a script in /etc called rc.local where I added a startup command for a test Forum.
The script original had one uncommented line "exit 0" and I added my command just above that.

-----------------------
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
/opt/lampp/lampp start
exit 0
-------------------------------------------

Lol, good question ... I guess you would need to add an authentication section to do that, but would not be great to do , because you will have to store the password in the file ( which is clear text )

Hi,

Change your startup script to add the following to the start of your commands:

su a_agent

Ian

How would you authenticate that user then, it will expect a password ?

Actually, no. root can su to a user without having to specify a passwd.
@xmdms; I'd use 'su -' to ensure the process has the newuser's env as well.

Here's an example


su - -c "/home/chris/t.sh" chris

put that in /etc/rc.local (or the equiv.) Depends on your distro. Add distro to your profile.

I will try as your suggested. Thank you!!

I was under the impression root was not allowed to run the script or execute it ... sorry

There's always something to learn in IT


That cmd runs it 'as the other user', but its 'called/originated from a root process' eg /etc/rc.local.

Hi Guys,

Do I put the command "exit 0" after each command line I execute or just once at the end of the script?

Thanks,

J

Actually you don't need to use it at all.
The default exit status of a shell script is that (ie status) of the last cmd run. You only need to specify it explicitly if you have a wrapper script that checks the exit status.

Got it!!

Thank you!!