One of the most important components of a Linux system is the root file system. A good development root file system provides the developer with all the useful tools that can help him/her on his/her work. Such a root file system can become very big in size, so it's hard to store it in flash memory. User could split the file system in different parts, mounting them from different media (flash, network, usb...). But the most convenient thing is to mount the whole root file system from the network, allowing the host system and the target to share the same files. In such a this way, the developer can quickly modify the root file system, even “on the fly” (meaning that the file system can be modified while the system is running).The most common way to setup a system like the one described is through NFS. As for tftpTFTP, installation and configuration depends on the host linux Linux distribution.