NFS- Network File System is the commonly used to share files over the network.It is widely used in UNIX-Linux based environments. NFS protocol is also used in Netapp storage for importing files to clients. NFS came across various improvements from verisons 1,2,3 and 4.
NFS 4.1 is in development stage.
NFS 4.1 is in development stage.
NFS Server configuration in Linux[NFS version 3]
Command to install the NFS package
# yum install nfs*
Create export file to enter the NFS share details
# vim /etc/exports
/data/file1 *(ro,sync)
/home 192.168.1.0/24(rw,sync)
/data/folder1 *.test.com(rw,sync)
/data/database1 192.168.1.203/32(rw,sync)
Explanation:
Read-only
access to the /data/file1 directory to all networks
Read/write
access to the /home directory from all servers on the 192.168.1.0 /24 network,
which is all addresses from 192.168.1.0 to 192.168.1.255
Read/write
access to the /data/folder1 directory from servers in the test.com DNS domain
Read/write
access to the /data/database1 directory from a single client 192.168.1.203.
Command to reload the NFS configuration file[show errors in config file, if errors available]
# exportfs -r
Command to restart the NFS services
# service nfs
restart
# service nfslock
restart
Command to start the NFS services on boot time
# chkconfig nfs on
# chkconfig nfslock
on
To view the exported NFS mount points from the server
# showmount -e
NFS Client side configuration in Linux
To view the exported NFS shares from a particular server(192.168.2.1)
# showmount -e
<192.168.2.1>
# mount -t
nfs 192.168.2.1:/data/files /media
To mount the NFS share permanently after reboot
# vim /etc/fstab
Directory Mount Point Type Options Dump FSCK
192.168.2.1:/data/files /media nfs defaults 0 0
#mount -a
