How to use NFS with IP address and hostname mapping?

To use NFS with IP address and hostname mapping, you can create a name-mapping rule on the NFS server that maps the IP address of the client machine to its hostname, and vice versa. Here are the general steps:

1. Edit the /etc/idmapd.conf file on the NFS server.
2. Add the following lines:

[Mapping]
Nobody-User = nobody
Nobody-Group = nobody
[Translation]
Method = nsswitch

This sets up the mapping rules.

1. Map the client machine’s IP address to its hostname, and vice versa, by adding the following lines to the /etc/hosts file:

client_ip_address client_hostname

and

client_hostname client_ip_address

Note that you may need to configure DNS on your network in order to ensure that the hosts file is updated correctly.

1. Modify the /etc/exports file to use the hostname instead of the IP address in the export line:

/path/to/share client_hostname(rw)

1. Save the file and restart the NFS service on the server.
2. On the client machine, mount the NFS share using the hostname instead of the IP address:

sudo mount -t nfs server_hostname:/path/to/share /mnt/nfs

This will mount the NFS share using the hostname mapping rule that you specified on the server.