Hi, I did some experimentation with MPICH on windows, and recently came to know that there is no support for Windows now. I am now shifting to Ubuntu. I was successful in installing MPICH2 and running my first MPI program on a single machine. Now I want to run my code on multiple PCs. How do I install MPI in a LAN ? What are the additional requirement if any? Do I need any specific hardware -network adapter My card details are as under: root@ubuntu:/home# lspci -nnk | grep -i net -A2 01:07.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ [10ec:8139] (rev 10) Subsystem: Hewlett-Packard Company Device [103c:301d] Kernel driver in use: 8139too Most of my machines are having this type of card and are connected in LAN. Really appreciate for any pointers to appropriate document or suggestions. Thanks and regards,