NFS-network file Sharing service(server)

This is used for file sharing in UNIX networks. A windows user will not be able to access these files as these shares will be purely for UNIX environment.
Package name:     nfs-utils
Service name:       nfs
Port number:         There is not specific for this server, it depends on service portmap. portmap requires 111 port.
                service portmap status
                netstat atnp |grep 111

Path:            /etc/export
Log file:        /var/logs/messages
   
    To share some file/directory,  just add the path for that file in the /etc/export in this format
sharename  space    ID/IP     nospace    permissions
sharename *ID/IP-permissions
/crackers *(ro,sync)
it will share the /crackers with the permissions(readonly,sync)
    where sync means if a new file is copied inside the /crackers  it will be shown to the users after the file is completely copied.
/crackers *(rw,async)
it will share the /crackers with the permissions(readwrite,async)
    where async means if a new file is copied inside the /crackers  it will be shown to the users  before it is completely copied.
/crackers 192.168.0.0/255.255.255.0(rw,sync)
it will share the /crackers with the permissions(readwrite,sync) to all the IP's that belongs to class 192.168.0.0/255.255.255.0

/crackers *.blackhats.com(rw,sync)
    it will share the /crackers to all the members of domain blackhats.com with the permissions(readwrite,async)

/crackers *.blackhats.com(ro,sync) EXCEPT godfather.blackhats.com(rw,async)
    it will share the /crackers to all the members of domain blackhats.com with the permissions(readonly,sync) while godfather.blackhats.com will have (readwrite,async) permissions.

                    HOW TO ACCESS NFS SHARES
    To access network shares one have to mount those shares by using this command:
#mount /source:/path@server /Destination
#mount /192.168.0.1:/crackers /mnt/nfsshares

    whenever we create a new mount point we have to restart nfs service. But when file replication is in progress never restart nfs service just use its updation as:
#exportfs -ra    (will updates nfs)
#exportfs -v    (will show mount)
    And the most important point is that root have to set permissions locally on those shares so that users can access this.

    installations can also be made in unix environment using nfs.