From mboxrd@z Thu Jan  1 00:00:00 1970
From: Luca Ferrari <fluca1978@virgilio.it>
Subject: Re: Two Questions.  Thanks for all the help so far.
Date: Wed, 31 Mar 2004 10:13:15 +0200
Sender: linux-admin-owner@vger.kernel.org
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On Wednesday 31 March 2004 09:10 Scott@Charter's cat walking on the keyboard  
wrote:

> 1) How would you set up a secure passwordless login to a machine?
>
> Am I on the right track with something like this:  user1:x:100:10:Joe
> User1:/home/user1:/dev/null  ?
>

You can change /dev/null to /sbin/nologin, see man nologin.


> 2) What would you do to find out what services are running on ip 1.2.3.4?
>
> Would this work?  netstat -a | grep 1.2.3.4

It is better to use nmap:
nmap -O 1.2.3.4
(better as root).


Luca


-- 
Luca Ferrari,
fluca1978@virgilio.it