Understanding Working of NFS
Servers:
File
sharing Server’s:
1.
NFS :
Network File System
These
servers are used in LAN
2.
FTP: File Transfer Protocol
These
servers are used in WAN & LAN
3.
Samba Server:
These
servers are used in Linux & Window heterogeneous networks.
Note:
1. NFS is used in LAN because
bandwidth for NFS is more than compared with FTP and Samba.
2. STP is used in WAN because FTP
requires very less bandwidth when compared to NFS .
Configuration Steps:
1)
Copy all the shared files to a single
location
/nfsshare
aa bb cc
2)
Create new file inside the share
directory
aa bb cc
3)
Packages:
i)
nfs-utils: to un-install the nfs-utils
ii)
portmap (please do not uninstall portmap
4)
services nfs
portmap
5)
Daemons:
nfsd
quotad
mountd
6)
Main Configuration File: /etc/exports
Experiment:
Ø Make
a directory named nfsshare with files aa bb cc:
#mkdir /nfsshare
#cd /nfsshare
#touch aa bb cc
#ls
aa bb cc
Ø Check
if the nfs-utils package is installed or not:
#rpm –q nfs-utils
(Prints a message whether package is installed or not)
#rpm –q portmap
Ø To
reinstall the package first remove it with the following commands:
#services nfs stop
#rpm –e nfs-utils
#rm –rf
/var/lib/nfs/xtab--------àremove
Ø If
package is not installed then there are two ways to install:
1.
Download from FTP and install
#ping the server
2.
Install from CD
#mount /dev/cdrom/mnt
#cd /mnt
#ls
#cd Fedora
#cd RPMS
#rpm –ivh nfs-utils*
--force –aid
#rpm –ivh portmap*
--force –aid
Ø After
installing the nfs-utils package create file as below:
#vi /etc/exports
/var/ftp/pub 192.168.0.0./24(ro,sync)
/nfsshare 192.168.0.0.24(rw,sync)
Note:in vi-editor write this
content (/nfsshare server ipaddress and
no. of systems that are connected in network)
Ø After
installing services enter the command to restart
#services nfs restart
Note: execute this
command twice because first it will show failed second time it will show ok.
Ø Access
to NFS share from client:
#mount –t nfs 10.10.12.114:/nfsshare/mnt
Note: In client machine
enter Server Ipaddress
Note:
1)
#ping 192.168.0.3 –b
Broadcasts the address in the network only.
2)
#ssh 192.168.0.8
Connects the PC to another PC just like Terminal
connection in Windows.
3)
In NFS
all files & Directory are by default in read only mode.
Common
KVM Switch: Using a KVM switch a monitor, keyboard, and a mouse can be connected to two
computers.