I just got a new computer that I want to use as (among other things) a network hard drive. I put it together, installed Ubuntu server via USB and setup Samba. It all seems to be working, so i started copying data from my existing network hard drive, first by mounting it and copying the data, next by using wget -r to retrieve it by ftp. Both methods seem to cause the networking to go down. If I restart networking, it starts working again, but until then, I cannot ping anything including the router. I can however ping localhost. The problem reoccurs seemingly randomly when I restart the transfer.
I cannot even figure out how to troubleshoot this problem. Can someone give me some pointers?