Where to put my init/config script

[regJoe]

Hi all,

I'm a serious newby so sorry if this turns out to be a dumb question...

I would like to set my ethernet card to a fixed IP address, (have a small closed network) - using the command:

ifconfig eth0 192.168.0.2 netmask 255.255.255.0 up

(GUI-tool gives a blocking bug when trying to apply changes).

I would like to include this in some script that is executed at startup; e.g. myIPConfig. Where should i put it?

- init.d, referring to it (link) from all relevant runlevel dirs, eg rc.3 and rc.5?

I noticed that this init.d dir only contains more complex stuff that uses expressions like exit; mine is however just some silly config setting!!!

So:

- Generally, where are network settings kept?
- And, where are config scripts typically put that apply to all runlevels and users?

Hope somebody can help me out on both these questions...


Thx, help very much appreciated!!!

 

[sleipnir214]

What Linux distribution are you running? ______________________________________________________________________

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TANSTAAFL!

 

[regJoe]

Sorry, that would be

Linux Redhat 2.4.18-14 #1

 

[regJoe]

eh, Red Hat 8.0, kernel 2.4.18-14...

 

[sleipnir214]

Good.

You don't have to add that command anywhere.

Take a look in /etc/sysconfig/network-scripts. There you should find a file named "ifcfg-eth0". You can edit that file and place the changes there.

To set the default gateway, edit /etc/sysconfig/network

To set your DNS settings, edit
/etc/resolv.conf

You'll have to be root to do all this. ______________________________________________________________________

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[regJoe]

Thanx, great info.

So about the other question, where in general do i put scripts and settings that affect some or all users?

(e.g. kernel parameter settings for an Oracle db installation)

would that be in the .bash_profile of the affected users, in the .bashrc, or more in some central init location, somewhere in the init.d planes?

thx

 

[sleipnir214]

The init system only handles part of bootup -- it does nothing for logging-in users.

Put the data in ~/.bash_profile. ______________________________________________________________________

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[fluid11]

If you want commands to run at system startup, put them at the end of the /etc/rc.d/rc.local file.

If you want to set environment variables for all users, put them in /etc/profile (for individual users, sleipnir214 answered that above, ~/.bash_profile).

If you want a script to execute for a certain runlevel at system startup, drop it in /etc/rc.d/rcX.d, where X is the runlevel you are booting into (3 is text mode startup, 5 is GUI startup). Actually, the way its normally done, is to drop the script in /etc/rc.d/init.d and then create a symlink to the appropriate rcX.d directorie(s). When putting a script (or a symlink to a script) in one of the rcX.d directories, make sure to name the file "S##script". The 'S' means to start the script (while a K means to kill it if its running), and the ## is a number that identifies what order the script will be executed. Make sure to use a number that isn't being used already.


ChrisP

 

[flugh]

To add to fluid11's excellent post, there's a program named "

chkconfig

" in Mandrake (so I'm assuming Redhat too). The point is, take your script you want run, put it in

/etc/init.d

. Put a line in your script like this:

# chkconfig 2345 20 80

The "2345" part means "start this program in runlevels 2,3,4, and 5". The "20" means "it's start priority is 20". The "80" means "it's shut-down priority is 80".

What's this do? Saves you from having to make a bunch of symlinks manually. If you need to tweak when your script starts during bootup, it's an easy adjustment. For more details, check out "

man chkconfig

.