Configuration file (/etc/exports) 1.1 format
<Output directory> [client 1 option (access permission, user ing, others)] [client 2 Option (access permission, user ing, others)]
2. output directory
Output directory: the directory to be shared to the client in the NFS system;
3. Client 3.1
The computer that can access the NFS output directory on the network;
3.2 specify common methods for clients
- Host with the specified IP Address: 192.168.0.200
- All hosts in the specified subnet: 192.168.0.0/24 192.168.0.0/255.255.255.0
- Host for the specified domain name: David .bsmart.cn
- All hosts in the specified domain: * .bsmart.cn
- All Hosts :*
Four options
Set the access permission and user ing of the output directory.
4.1 permission options
- Set output directory read-only: RO
- Set output directory read/write: RW
4.2 User ing options
- All_squash: maps all common users and groups remotely accessed to anonymous users or user groups (nfsnobody );
- No_all_squash: returns an inverse value from all_squash (default );
- Root_squash: maps root users and groups to anonymous users or user groups (default );
- No_root_squash: returns the inverse of rootsquash;
- Anonuid = xxx: maps all remotely accessed users to anonymous users and specifies the user as a local user (uid = xxx );
- Anongid = xxx: maps all remotely accessed user groups to anonymous user group accounts, and specifies this anonymous user group account as a local user group account (gid = xxx );
4.3 Other Options
- Secure: restrict the client to connect to the NFS server from a TCP/IP Port less than 1024 (default );
- Insecure: allows the client to connect to the server from a TCP/IP Port greater than 1024;
- Sync: write data synchronously to the memory buffer and disk, which is less efficient, but can ensure data consistency;
- Async: stores data in the memory buffer before writing data to the disk if necessary;
- Wdelay: Check whether there are related write operations. If yes, execute these write operations together to improve the efficiency (the default setting );
- No_wdelay: if there is a write operation, it will be executed immediately and should be used with sync;
- Subtree: If the output directory is a sub-directory, the NFS server checks the permissions of its parent directory (default );
- No_subtree: even if the output directory is a sub-directory, the NFS server does not check the permissions of its parent directory, which improves efficiency;
002. nfs-related configuration items
