Remote Share with NFS on Linux

作者佚名技术来源 Linux系统浏览发布时间 2012-04-24

NFS can mount a remote directory as local (ex. Server1:/yofee server2:/s1yofee),we can copy,modify,delete and save it as local files. You can deploy it with below workflow. RemoteServer site:

1.login to server1 as root
2. Check whether the process of portmap works with this command:
# ps -aux|grep portmap

it should showed us the detail information about the process of portmap, otherwise we must start this service by manual

# /etc/rc.d/init.d/portmap start

3. Add these info as below into this file /etc/exports

/yofee server2(rw,root_squash) server3(rw,root_squash)

/yofee is a directory what we will shared on server1,and the server2 & server3 are local PC(of course, we can put it as IPaddress), rw is means that after mounted we can read and write it, if we using ro instead of rw,we can only read it. root_squash tell us the root can not write it after mounted, otherwise we can also use this one no_root_squash.
4. Start or restart the process of nfs
# / etc/rc.d/init.d/nfs start

5. If we hope the remote directory has mounted to local PC automatically when the local PC restart.we should create two link file about it.

# ln -s /etc/rc.d/init.d/portmap /etc/rc.d/rc5.d/S18portmap
# ln -s /etc/rc.d/init.d/nfs /etc/rc.d/rc5.d/S28nfs

Local site:

1. Login on server2 or server3 as root. Start the service of portmap
# /etc/rc.d/init.d/portmap restart

2.create a mountsite for remoteserver directory (a Local directory)
#mkdir /s1yofee

3. Add these information as below into this file /etc/fstab
server1:/yofee /s1yofee nfs deaults 0 0

4. Mount the remoteServer directory.
# mount -a

5.list the local mountsite directory and confirm whether it is the same as remote directory
# ls /s1yofee

Now, we can see the share directory from server1 on the local site.
BTW：pay attention to the order of service start. First : portmap then: nfs For the command of exportfs If we start the service of nfs and then modified the /etc/exports, shall we restart the nfs? No, we can use exportfs to active this process immediate.
exportfs [-aruv]
-a ：mount all of the contents about /etc/exports
-r ：mount /etc/exports again
-u ：umount the directory
-v ：print to screen when export it

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