Linux NFS Server: How to Set Up Server and Client On Oracle Linux 9

 Network File System (NFS) is a networking protocol for distributed file sharing.    
Configure NFS Client to mount NFS Share on NFS Client.  || This example is based on the environment like follows.
+----------------------+          |          +----------------------+
| [    NFS Server    ] |192.168.1.40 | 192.168.1.50| [    NFS Client    ] |
|    server.second.com     +----------+----------+   server.testbox.com   |
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Server - Os:  Oracle Linux Server 9  
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cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y

192.168.1.40 ||server.second.com
dnf -y install nfs-utils
nano /etc/idmapd.conf
Domain = server.second.com
nano /etc/exports
/home/nfsshare 192.168.1.40/24(rw,no_root_squash)
mkdir /home/nfsshare
systemctl enable --now rpcbind nfs-server
firewall-cmd --add-service=nfs ; firewall-cmd --add-service={nfs3,mountd,rpc-bind} ; firewall-cmd --runtime-to-permanent

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Configure NFS Client -Oracle Linux Server 9||||  server.testbox.com|192.168.1.50|
dnf -y install nfs-utils
nano /etc/idmapd.conf
Domain = server.testbox.com
firewall-cmd --add-service=nfs ; firewall-cmd --add-service={nfs3,mountd,rpc-bind} ; firewall-cmd --runtime-to-permanent

mount -t nfs  192.168.1.40:/home/nfsshare /mnt
df -hT
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