What is NFS?
The Network File System (NFS) is a client/server application that lets a computer user view and optionally store and update files on a remote computer as though they were on the user's own computer. The NFS protocol is one of several distributed file system standards for network-attached storage (NAS).
RedHat, Scientific Linux, CentOS, Fedora
Disable or allow firewall to NFS from clients connecting to NFS volume
firewall-cmd --reload
You may also need the below set on your firewall depending on your zone.
firewall-cmd --permanent --zone=public --add-service=rpc-bind
OR - disable firewalld
Install NFS on (Client & Server)
Then enable and start the nfs server service so clients can connect.
systemctl start nfs-server.service
Make the directory in which you want access too
chown nfsnobody:nfsnobody /home/nfs
chmod 755 /home/nfs
Edit the exports file and add the following lines
/home 192.168.1.101(rw,sync,no_root_squash,no_subtree_check)
/home/nfs 192.168.1.101(rw,sync,no_subtree_check)
Now export changes from export to NFS and restart server
Restart NFS
Skip below if you want to auto mount during startup *****
Mount | System IP/Host | Mount Point
---------------------------------
mount 192.168.1.100:/home /mnt/home
mount 192.168.1.100:/var/nfs /mnt/home/nfs
OR
Say you have a hosts file with n1 as the host machine
127.0.0.1 localhost localhost.localdomain
192.168.0.10 n1
You would then use below example to mount from server or host, although you need the hosts file on the clients as well like example.
mount n1:/home /mnt/home
mount n1:/var/nfs /mnt/home/nfs
Automounting NFS at OS Startup
Add below line to fstab
n1:/home/nfs /mnt/home/nfs nfs rsize=8192,wsize=8192,timeo=14,intr,rw,sync,hard,_netdev
Save it, then try mounting
Verify mount point by typing
If you modify the exports again you can use the below command options to export the new lines
More details on command functions below
exportfs -v : Displays a list of shares files and export options on a server
exportfs -a : Exports all directories listed in /etc/exports
exportfs -u : Unexport one or more directories
exportfs -r : Reexport all directories after modifying /etc/exports
More information
nfsstat -m – Print information about each of the mounted NFS file systems. (install it with : apt-get install nfs-common)
nfsstat -c – A high number of NFS retransmissions can be detected
nfsstat -r – to see the current nfst statistics for retranmission of packets
netstat -s – Display summary statistics for each protocol.
netstat -i – To get the current value of your MTU
showmount – show mount information for an NFS server
