How to build NFS server under Linux server
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First, install and configure nfs server
1 > for the nfs server to provide services, you must start inet, portmap,nfs, and mount
These four daemons are kept running in the background.
2 > Plan the partition or directory to be shared
3 > define parameters for the client
4 > configure nfs main configuration file: / etc/exports
5 > restart the nfs service
1. Syntax of the configuration / etc/exports file
# vi / etc/exports
/ sharedir-maproot=daemon host2
/ sharedir2-ro-network 192.168.1.0
Or use the following format
/ sharedir host3 (option)
/ sharedir 192.168.1.12 Compact 24 (option)
The first paragraph: for a shared directory, be sure to have an absolute path.
The second paragraph: some parameters, such as:-maproot=daemon indicates that if the visitor is a root user, it will be converted to a daemon user;-ro: indicates read-only permission.
The third paragraph: indicates that the client allowed to access can be a host, such as host2; or a network segment. The host can be represented by a domain name or ip. The domain name supports wildcards but does not include dots. For example, * .example.net, it can mean e1.example.net or e2.example.net, etc., but not s1.e1.example.net.
The third format means that those read-write, read-only and other parameters can be written in parentheses and separated by commas.
2. Activate services portmap and nfsd
After portmap is activated, a sunrpc service with port number 111will appear
# service portmap restart
# service nfs restart
3. Client configuration
3.1 enable portmap service
3.2 Mount a shared directory using the mount command
Mount-t type-o option device dir
# mount-t nfs-o hard 192.168.1.22:/sharedir / tmp/
In addition to using the mount command, users can also mount it using / etc/fstab or autofs.
II. Nfs server configuration example
Nfs server-side configuration:
1. First check whether the following software packages are installed on the server side
# rpm-qa | grep nfs
Nfs-utils-1.0.9-16.e15
Nfs-utils-lib-1.0.8-7.2
two。 Configure nfs server-side configuration file: / etc/exports
/ sharedir: is a shared directory with permissions restricted by share permissions (rw) and local permissions.
192.168.1.22 Compact 24: allow all machines in the 192.168.1.0 network segment to access
# vim / etc/exports
# cat / etc/exports
/ sharedir 192.168.1.22 Compact 24 (rw)
3. Restart the nfs service
# service nfs restart
Nfs client configuration:
1. Confirm the installation of the portmap package
# rpm-qa | grep portmap
Portmap-4.0-65.2.2.1
two。 Enable the portmap service
# service portmap restart
3. View a nfs server shared directory
192.168.1.22: the ip address of the nfs server
# showmount-e 192.168.1.22
Export list for 192.168.1.22:
/ sharedir 192.168.1.22/24
4. Mount the shared directory of the server
-t nfs: indicates the file system format of the mounted file, or it can be omitted
# mount-t nfs 192.168.1.22:/sharedir / mnt/
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