Services and "sudo ifdown eth0" on boot?

J_K9 · 07-14-2005, 02:52 AM

Hi,

Part 1
I currently have two NICs on my Ubuntu laptop - one inbuilt one, and a PCMCIA one. The inbuilt one is broken, as in physically broken, but it's still sending signals to Ubuntu that it's an NIC. Both of the NICs are in conflict, so every time I boot up my laptop I have to go into terminal and type in "sudo ifdown eth0" (don't think it works without root), and then my PCMCIA card (eth1) works and I can access the internet.

How can I make Ubuntu run "ifdown eth0" on boot, so that I don't have to do it manually each time? Thanks!

Part 2
Hello again

, how can I start up a service (for example nessusd) on boot? I think it has something to do with rc.d, but I found loads of those directories in /etc, so I'm slightly confused.....

J_K9

Michael Johnson · 07-14-2005, 03:48 AM

On part one can you disable the inbuilt ethernet port through your BIOS. This will eliminate the problem.
The second point you should have a menu item for you to select what services you want to run. I don't use Gnome so I can't tell you exactly where it is.

Nathanael · 07-14-2005, 04:06 AM

for part one:
you can also go into /etc/network/interfaces and comment out the line that reads

Code:

auto eth0

this will then stop eth0 from being activated atomatically at boot time

part 2:
find out which runlevel you are currently using (debian standard is 2 i think)
type

Code:

#runlevel

to find out

then symlink the init script to the right rcX.d directory eg.:

Code:

#ln -s /etc/init.d/nessusd /etc/rc2.d/S90nessusd

do all this as root!

J_K9 · 07-14-2005, 04:12 AM

edit: Thanks for the last post! I am having some problems though...This is what my /etc/network/interfaces looks like:

Code:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
	script grep
	map eth0

iface eth0 inet static
address 192.168.1.106
netmask 255.255.255.0
gateway 192.168.1.1



iface eth1 inet dhcp

auto eth1

That's pretty confusing to me!

What should I do? Should I replace all the eth0 with eth1, and then just comment out the last 2 lines?

I haven't tried the service thing yet (because I can't remember which service I wanted to start on boot!

), but how do I know which is the right rcx.d directory? Thanks again,

J_K9

Nathanael · 07-14-2005, 04:29 AM

change the lines

Code:

mapping hotplug
	script grep
	map eth0

to either read

Code:

mapping hotplug
	script grep
	map eth1

or uncomment those lines entirely (that is what i would try, just giving it a shot!)
to find out which runlevel you are using, run the command 'runlevel'
this will output something like
N 2
then you would want to adding/removing simlinks to/from /etc/rc2.d

J_K9 · 07-14-2005, 04:35 AM

Thanks! I've also changed the following lines:

Code:

iface eth0 inet static
address 192.168.1.106
netmask 255.255.255.0
gateway 192.168.1.1

so that they're all commented out. That's right isn't it? That just leaves eth1 on dhcp.

Oh, and my runlevel is also N 2 so I would add the links to rc2.d, gotcha!

Thanks for everything!

J_K9