Introduction to NFS service construction under Centos7

rw # The client can read and write to the shared directoryro # The client can only read but not write to the shared directorysync # Synchronous mode, that is, writing the data in the memory to the hard disk in real time, but this will reduce disk efficiencyasync # Asynchronous mode, that is, writing the data in the memory to the hard disk at regular intervals, which can ensure disk efficiency, but when there is an abnormal crash/power outage, the data in the memory will be lostno_root_squash # After the client mounts the NFS shared directory, the root user on the client is not restricted by these mount options and has great permissionsroot_squash # In contrast to no_root_squash, the root user on the client is restricted by these mount options and is treated as an ordinary userall_squash # All users on the client are limited to an ordinary user when using the NFS shared directoryanonuid # The above squashes are used to limit the client's users to ordinary users, and anouid is used to limit the uid of this ordinary user. This uid corresponds to the /etc/passwd file on the server, such as: anouid=1000
                  # For example, if I use the user xiaoming to create a file on the client, when the server synchronizes the file, the owner of the file will become the user anongid corresponding to the server's uid (1000) # Same as above, used to limit the gid of this ordinary user