1.NFS

NFS is a Network File System that enables File sharing between different machines and systems over the Network. Through NFS, you can access a remote shared directory just as you can access a local disk. In embedded Linux development, the development board is often used to run programs on the target machine.

2. Set up the NFS server on the Linux host

2.1. Install the NFS server

sudo apt-get install nfs-kernel-server
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2.2. Adding an NFS shared directory

2.2.1. Creating a shared directory

sudo mkdir /nfsroot
sudo chmod -R 777 /nfsroot
sudo chown -R nobody /nfsroot
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2.2.2. Edit the configuration to specify the NFS shared directory

sudo vim /etc/exports
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/nfsroot	*(rw,sync,no_root_squash)
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2.2.3. Starting the NFS service

sudo /etc/init.d/nfs-kernel-server start
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Note: The NFS service is automatically started upon system startup.

3. Perform a self-test for an NFS client on the Linux host

3.1. Install an NFS client

sudo apt-get install nfs-common
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3.2. Mount the NFS shared directory to another directory

Sudo mount -t NFS <Linux host IP address >:/nfsroot/MNT -o nolockCopy the code

3.3. View test results

Go to the /nfsroot shared directory and create a test folder:

sudo mkdir nfs_test
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Then enter the/mntDirectory to view:

4. Mount NFS on the Linux development board

Mount -t NFS <Linux host IP address >:/nfsroot/MNT -o nolockCopy the code

5. Problems encountered and solutions

After the NFS service is enabled on the cloud server, the NFS service can be mounted on the local server, but not on the development board. The following information is displayed:

Cause: An invalid port is used, that is, a port greater than 1024 is used.

Fix the problem: Modify the /etc/exports configuration file and add the insecure option to restart the NFS service.

Result: The mount is successful.