exports

TLDR

View current exports

$ exportfs -v

Reload exports configuration

$ sudo exportfs -ra

Export directory temporarily

$ sudo exportfs -o [rw,sync] [client:/path]

Unexport directory

$ sudo exportfs -u [client:/path]

SYNOPSIS

/etc/exports - NFS exports configuration
exportfs [options] [client:/path]

/etc/exports defines which directories are shared via NFS (Network File System). Each line specifies a path and which clients can access it with what options.
The exportfs command manages the export table at runtime, reading from /etc/exports and updating the kernel's export table without restarting NFS services.

PARAMETERS

exportfs -r

Re-export all directories.

exportfs -a

Export all entries in /etc/exports.

exportfs -u client:/path

Unexport directory.

exportfs -v

Verbose; show current exports.

OPTIONS

rw / ro

Read-write or read-only access.

sync / async

Synchronous or asynchronous writes.

no_root_squash

Don't map root to anonymous user.

root_squash

Map root to anonymous user (default).

all_squash

Map all users to anonymous.

subtree_check / no_subtree_check

Subtree checking.

secure / insecure

Require ports < 1024.

EXPORTS FILE FORMAT

$ /path      client(options)
/home      192.168.1.0/24(rw,sync)
/data      *(ro,async)
/shared    @group(rw,no_root_squash)

CAVEATS

Changes to /etc/exports require `exportfs -ra` to take effect. Security relies on IP-based access control by default. Consider Kerberos for authenticated NFS. Permission mapping between client and server must be considered.