NFS

Network File System (NFS) is a distributed file system protocol that allow to share files and folders using a TCP network.

Installation

apt install nfs-common
apt install nfs-kernel-server

 systemctl status nfs-server.service

Commands

• exportfs (apt install nfs-kernel-server)

Example output NFS share to everyone: HOST#exportfs /nfs <world>

showmount
Hosts on SERVER_NAME:

showmount -e
Export list for SERVER_NAME:

showmount -e
Export list for SERVER_NAME:
/path/exported 10.10.10.10/24

showmount
clnt_create: RPC: Program not registered

showmount -e
Restart service: systemctl start nfs-server

Configuration files

/etc/exports

Example:

/export       192.168.1.0/24(rw,fsid=0,insecure,no_subtree_check,async)
/export/users 192.168.1.0/24(rw,nohide,insecure,no_subtree_check,async)

fsid=0 signals the NFS server that this export is the root.

Warning: /etc/exports is affected by adding additional space characters, be mindful about format

NFSv4

NFSv4 no longer utilizes the MOUNT protocol.

Activities

• Setup a NFS server in Ubuntu following: https://help.ubuntu.com/community/SettingUpNFSHowTo

Install server: apt-get install nfs-kernel-server

Install client (optional): apt-get install nfs-common

• Mount a remote nfs share:

mount -t nfs -o proto=tcp,port=2049 REMOTE_IP_SERVER:/REMOTE_SHARE_DIR /YOUR/LOCAL_DIR/

mount -t nfs4 10.10.10.2:/ ./
mount: /mnt: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program
(Install client:  apt-get install nfs-common)

See also

• sanlock shared storage lock manager
• Storage protocols: CIFS, NFS, iSCSI, FCP, FCoE, SMB, NetBIOS, SCSI
• EFS and EBS

https://linux.die.net/man/5/exports