Ben Chuanlong Du's Blog

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Tips on NFS

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

  1. Make sure nfs service is not blocked. Check iptables and "/etc/hosts.allow".

  2. Make sure nfs service is running on the server.

    sudo service nfs-kernel-server start

  3. You can choose the version of nfs using the option -o nfsvers=n while mounting directories. It seems to me on Debian you have to use -o nfsvers=3 (based on a previous experience). mount -t nfs -o nfsvers=3 192.168.0.8:/home/dclong/downloads mnt/nfsshare Generally speaking, you do not have to choose a specific version manually. I tried on Ubuntu (server) and Linux Mint (client) and it works well with the default version (4).

  4. You can choose to change the ownership of a shared file/directory to nobody/nogroup to make it easier to access files, but this is not required and you will probably only have read access unless the option no_root_squash is specified in the server settings or your user name is the name on the client as on the server.

  5. You can use wildcard in the /etc/exports settings. For example,

    /nfs 192.168.*.*(ro,sync)

    shares /nfs with all local network devices with ready-only access. more examples

    *(ro,sync) all ips
*.iastate.edu(ro,sync) all iastate.edu ips

  6. You can use net mask in the /etc/exports settings. for example,

    /nfs 192.168.1.0/24(ro,sync)

    shares /nfs with local ip address 192.168.1.1 to 192.168.1.254. It is equivalent to 

    /nfs 192.168.1.*(ro,sync)

/etc/exports

Below is an example of /etc/exports. :::text # /etc/exports: the access control list for filesystems which may be exported # to NFS clients. See exports(5). # # Example for NFSv2 and NFSv3: # /srv/homes hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check) # # Example for NFSv4: # /srv/nfs4 gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check) # /srv/nfs4/homes gss/krb5i(rw,sync,no_subtree_check) #

/wwwroot        *(rw,sync,fsid=0,crossmnt,no_subtree_check)

Mount NFS

#mount on Linux
sudo mount -t nfs4 -o proto=tcp,port=2049 10.148.179.93:/ /wwwroot

:::bash 
# mount on macOS
sudo mount -t nfs -o vers=4,resvport 10.148.179.93:/ mnt

References

http://cworld.wikidot.com/mac-os-x-automount-resvport-option

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