[plug] Trace files

[Anthony J. Breeds-Taurima]

On Sun, 10 Dec 2000, Robert Andrews wrote:

> Hi all
> ? When I issue a command like IFUP PPP0
> is there a way that i can see exactly what files and scripts are being used by the command
> other than going through the scripts themselves.

you can do sh -x ifup ppp0  That will show you what ifup does BUT if ifup
calls other shells scripts you wont see what they do.

I believe there should be a way to make all shells inherit the -x flag but I
don't know how.

> I am relitvly new to Linux and live in a town that I know of no other Linux users.
> This group is my only source of communication about Linux so please bear with me.
> I have a file in /etc/ppp/ ifcfg-ppp0 that issues commands to my modem however it does not appear to be used so the modem configuration must be comeing from another file.
> I will no doubt want to trace other commands in the future to see what files and scripts are being executed so I can continue my Linux self teaching.

You're useing a RedHat (based) system The way redhat does it's modem stuff
changes with the different versions but the details below are basically the
same.

/etc/ppp/   should contain
	ip-up, if-up.local          scripts run when the PPP link comes up.
	ip-down, if-down.local      scripts run when the PPP link goes down.
	options                     options you want PPP to run with, RedHat tends
                                  to do lots of it's optins on the command line
	pap-secrets                 If you are using PAP then the details are here
	chap-secrets                If you are using chap then the details are here

The rest of the config stuff is in /etc/sysconfig/network-scripts

The files relevant to ppp are:
ifup-ppp
	This script does that actual work of bringing the link up.

ifcfg-ppp0  (the 0 will vary if you have more than one ppp link)
	Config file for the conection

chat-ppp0  (the 0 will vary if you have more than one ppp link)
	chatscript to connect the modem to your ISP.  If you ISP uses a script to
	connect its users then the login stuff will be heer aswell.


Yours Tony.

/*
 * "The significant problems we face cannot be solved at the
 * same level of thinking we were at when we created them."
 * --Albert Einstein
 */