NFS mount failure records

NFS mounting failure is recorded in the embedded development environment. The NFS function is the most commonly used and one of the important tools to improve development efficiency. However, in my development experience, NFS mounting is often used, especially when the root file system is mounted. Although the previous problems and experience have not been fully recorded, however, this problem may occur in the future. Therefore, we will record the NFS problems encountered in subsequent development. Mount failed: No Such Device problem 01/tmp $ mount-t nfs 192.168.0.7:/work/dvr/software/dvr/tmp-o nolock02mount: Mounting 192.168.0.7: /work/dvr/software/dvr on/tmp failed: No such device03/tmp $ ls04/tmp $ cd .. 05/$ mount-t nfs 192.168.0.7:/work/dvr/software/dvr/tmp-o nolock06mount: Mounting 192.168.0.7:/work/dvr/software/dvr on/tmp failed: no such device07/$ ls tmp/08/$ modprobe nfs # cause: nfs module loading is faulty 09/ $ Mount-t nfs 192.168.0.7:/work/dvr/software/dvr/tmp-o nolock10/$ other common causes of mount failure are Directory Access Permissions and no nolock option is used.