I have just set up a network of 2 PCs using Ethernet connection, both running Linux.
How to transfer files between them?
Wait, these are going through a router, right? I suggest using either SSH with SCP (man [ssh|scp] you will need sshd (package)) or FTP (you will need ftp-server. You can also make one a server, and have the other SSH to the other one and just work there...