写一本电子书《从零开始到深入Linux内核》，听听大家的需求和建议

在开发板上挂载NFS系统，可是出现下面的错误，导致挂载不上NFS
IP-Config: No network devices available.
RAMDISK: Couldn't find valid RAM disk image starting at 0.
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

不知怎么解决，请教大家一下

在开发板上挂载NFS系统，可是出现下面的错误，导致挂载不上NFS
IP-Config: No network devices available.
RAMDISK: Couldn't find valid RAM disk image starting at 0.
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

不知怎么解决，请教大家一下