Exporting File Systems Temporarily

When the NFS server is activated, it keeps a list of exported file systems in the /var/lib/nfs/xtab file. This file is initialized with the list of all directories exported in the /etc/exports file by invoking the exportfs -a command when the NFS server initializes. With the exportfs command, it is possible to add a file system to this list without editing the /etc/exports file or restarting the NFS server. For example, the following exports the directory /srv to all the servers in the network 192.168.1.0:

exportfs 192.168.1.0/255.255.255.0:/srv

The exported file system will become available immediately but will be available only until the next reboot of your NFS server. If you want it to be available after a reboot as well, make sure to include it in the /etc/exports file.

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