[nylug-talk] sudo: ruby: command not found on Ubuntu

[Chris Knadle]

On Saturday 30 June 2007, Y. Ph. wrote:
> Thank you for your help.  Do you know why the Inet Address in Ubuntu (I use
> the  ifconfig command) is different from my IP address in Windows when I do
> ipconfig? Does it mean that my Ubuntu Internet doesn't have security setup 
> as Windows, in another word, my Ubuntu connection to the Internet is wide
> open?

   No, I don't think it's a security related issue.  What specific IP address 
you receive is probably not a factor in your case when it comes to specific 
firewall rules, unless you've got firewall rules in your router that are IP 
specific.

   If I remember correctly you're running Ubuntu under VMware, presumably on 
top of Windows.  That means that the ethernet device for Ubuntu is 
virtualized, so it likely has a different MAC address than the Windows 
ethernet device is using.  Most DHCP servers also hand out the same IP 
address that was previously given to a particular MAC address.
   Last I recall I think it is possible for a virtual host to have the same IP 
address as the actual host, but only using NAT [Network Address Translation], 
and using that would mean that the host an machines outside of the host had 
no way of directly getting to the virtual machine by IP address -- because 
the IP address would primarily be that of the host.

   The bottom line is that I don't think there's anything wrong with your 
setup with regards to IP addresses.

   -- Chris

-- 

Chris Knadle
Chris.Knadle at coredump.us