as root you can try this
If your ethernet connection is eth0 then you will see a line like this one:
That address is your IP for the LAN. Your IP should be the same for both OS's, but it is only guarenteed if your IP is static, or if your address assigner (router or whatever) associates your ethernet's hardware address with a certain IP address, in which case your computer
will have the same IP because of your card having a static hardware address.