# NFS
Network File System since the 80s

NFSv4 is recommended since it supports TCP and Kerberos authentication.


# Configuration
Folders are defined in `/etc/exports`. An example:

```sh
# public read only share
/mnt/data/iso *(ro)

# alice can readwrite, bob can read
/var/www alice(rw) bob(ro)

# everyone from netsec.local domain has access
/var/backup *.netsec.local(rw)

# different networks have different levels of access
/var/upload 10.10.10.0/24(ro) 10.10.20.0/24(rw)
```

After changing configuration, run `exportfs -arv` to write export dirs to `/var/lib/nfs/etab`


# Usage
On a client, mount the NFS export: `mount -t nfs -o vers=4 server:/mnt/data /home/servermnt`
**NOTE** Sometimes providing just an IP address in place of a hostname can cause mount to hang.

Mount it permanently using fstab: `server:/mnt/data /home/servermnt nfs defaults,timeo=900,retrans=5,_netdev 0 0`


See also
--------
See the arch wiki https://wiki.archlinux.org/title/NFS for more info.