Linux system Mount Setup method via NFS Network File system _linux

Introduction to NFS

NFS is the shorthand for network file system, which is the network filesystem. The network file system is one of the FreeBSD supported file systems, also known as NFS. NFS allows a system to share directories and files with others on the network. By using NFS, users and programs can access files on the remote system as they would access local files.

NFS Benefits

The following are the most obvious benefits of NFS:

1. The local workstation uses less disk space because the usual data can be stored on a single machine and can be accessed over the network.
2. Users do not have to have a home directory in the machine on each network. The home directory can be placed on an NFS server and available everywhere on the network.
3. Storage devices such as floppy drive, CDROM, and Zip (refers to a high storage density disk drive and disk) can be used by other machines on the network. This can reduce the number of removable media devices on the entire network.

Linux Server 192.168.190.199 Service side
Linux Server 192.168.190.208 Client

192.168.190.199 (server-side) configuration actions:

1. Installation Services

Check to see if installation Nfs,portmap service

If NFS is not installed, Portmap use Yum Search < package name > install the appropriate package

2. Configure/etc/exports

Configuring in/etc/exports Files

Configuration parameters are as follows

[Shared directory] [Host name 1 or IP1 (parameter 1, parameter 2)] [Host Name 2 or IP2 (parameter 3, parameter 4)]

Here are some common parameters for NFS sharing:

RO read-only access
RW Read-Write access
Sync all data is written to share when requested
Async NFS can request it before writing data
Secure NFS is sent via a secure TCP/IP port under 1024
Insecure NFS is sent over 1024 ports
Wdelay If multiple users are writing to the NFS directory, group write (default)
No_wdelay If multiple users are writing to the NFS directory, write now and do not need this setting when using Async.
Hide does not share subdirectories in NFS shared directories
No_hide Share subdirectories for NFS directories
Subtree_check Force NFS to check the permissions of the parent directory (default) if you share a subdirectory such as/usr/bin
No_subtree_check and above, do not check parent directory permissions
All_squash the UID and GID of shared files map anonymous users anonymous, which is suitable for public directories.
No_all_squash preserves UID and GID for shared files (default)
Root_squash all requests for root users are mapped to the same permissions as anonymous users (default)
No_root_squas Root user has full administrative access to the root directory
Anonuid=xxx Specify the UID of anonymous users in server/etc/passwd files for NFS
Anongid=xxx Specify the GID for anonymous users in server/etc/passwd files for NFS

Such as:

Copy Code code as follows:

/home/share208 192.168.190.208 (rw,sync) * (RO) Configuration instructions: read-write access to 192.168.102.15, other machines have read-only access.

3. Services for NFS

Start the NFS service

Copy Code code as follows:

/etc/init.d/portmap start
/etc/init.d/nfs start

Stop NFS Services

Copy Code code as follows:

/etc/init.d/nfs stop
/etc/init.d/portmap stop

Restarting the NFS service

Copy Code code as follows:

/etc/init.d/nfs restart
/etc/init.d/portmap restart

Check the status of Portmap and NFS services

Copy Code code as follows:

/etc/init.d/portmap status
/etc/init.d/nfs status

To set up an NFS service to start automatically

For Linux systems in practice, it is not realistic to start the NFS service manually after each boot, and you should set up the system to automatically start Portmap and NFS services at the specified run level (typically 3 and 5).

Copy Code code as follows:

Chkconfig–level Portmap on
Chkconfig–level NFS On

Execute the "NTSYSV" command to start the service configuration program, locate the "NFS" and "portmap" services, precede them with "*" and select "OK".

4.192.168.190.208 (customer side) configuration client

Create a folder Mount server folder under a specified directory

Copy Code code as follows:

mkdir–p/home/share208
Mount 192.168.190.199:/home/share208/home/share208 (mounted)

5. Test Mount

Copy Code code as follows:

192.168.190.208/HOME/SHARE208 Create directory Test
192.168.190.199/home/share208 View already has the test directory

The test was successful.