Network File System since the 80s

NFSv4 is recommended since it supports TCP and Kerberos authentication.

Folders are defined in /etc/exports. An example:

# 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

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