vi, TFTP, NFS, Samba.
1. vi is a programmers text editor. here is a tutor for it in Linux , so great!
3. NFS: share directory and file between linux and linux.
4. Samba: share directory and filel between linux and linux, linux and windows.
It is not a tutorial for vi, TFTP, NFS, Samba, this is only a point of my Linux memory.
when get a problem on one of them, I will think the method of solve by myself, google.