| Cooking with UNIX/Linux |
|
| Cooking with UNIX/Linux > Network File System (NFS) |
Network File System (NFS)NFS RECIPE by Frederik Dannemare### Install the necessary packages on the server # sudo apt-get install nfs-common nfs-kernel-server portmap ### Install the necessary packages on the clients # sudo apt-get install nfs-common portmap ### Share (as read-only) /data to all client machines in ### subnet 192.168.1.0 by adding this line to /etc/exports /data 192.168.1.0/255.255.255.0(ro,hard,intr) ### Share (as read-write) /usr/local to client machine ### wih IP 192.168.1.5 by adding this line to /etc/exports /usr/local 192.168.1.5(rw,hard,intr) ### Using the hard option will make client processes using ### files on the nfs server hang and wait if the server goes ### down for whatever reason. The the server is back online ### the processes will continue undisturbed from where they ### were. In case you want to be able to kill the hanging ### processes for whatever reason, you will also need to ### specify the intr option. Without the intr option, ### it will be impossible to kill the hanging processes. ### For security reasons use hosts.[allow|deny] to restrict ### access to the daemons related to NFS. Start out by denying ### all hosts access (in /etc/hosts.deny) to any of the daemons, ### and then list the allowed hosts explictly in /etc/hosts.allow ### This should be done on the server and all clients ### /etc/hosts.deny portmap: ALL rpc.lockd: ALL rpc.statd: ALL rpc.mountd: ALL rpc.nfsd: ALL ### /etc/hosts.allow portmap: 192.168.1.0/255.255.255.0 rpc.lockd: 192.168.1.0/255.255.255.0 rpc.statd: 192.168.1.0/255.255.255.0 rpc.mountd: 192.168.1.0/255.255.255.0 rpc.nfsd: 192.168.1.0/255.255.255.0 ### Whenever you change something in /etc/exports you should ### use exportfs to have the nfs daemon re-read its content # exportfs -r ### In order to mount an NFS exported filesystem on a server ### called nfsserver, simply do # mkdir /mnt/nfs # mount -t nfs nfsserver:/usr/local /mnt/nfs ### Using showmount on the server you can see which clients ### have the exported filesystems attached # showmount ### To print NFS statistics use nfsstat # nfsstat ### Put this into /etc/fstab to have the shares mounted at boot time # <file system> <mount point> <type> <options> <dump> <pass> nfsserver:/usr/local /mnt/nfs1 nfs rw,hard,intr 0 0 nfsserver:/data /mnt/nfs2 nfs ro,hard,intr 0 0
|
| < | TOP | > |