Linux Practice strategy: NFS server troubleshooting

Article Title: Linux Practice strategy: NFS server troubleshooting. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

In Red Hat Enterprise Linux 5.0 server, if NFS fails, you can check the problem from the following aspects.

1.1 troubleshooting ideas

(1) Whether the NFS client and server load is too high, and whether the network between the server and the client is normal.

(2) Correctness of the/etc/exports file.

(3) restart the NFS or portmap service if necessary.

Run the following command to restart portmap and NFS:

Service portmap restart

Service nfs start

(4) check whether the mount command or/etc/fstab syntax on the client is correct.

(5) check whether the kernel supports the NFS and RPC services.

Common kernel options include CONFIG_NFS_FS = m, CONFIG_NFS_V3 = y, CONFIG _ NFSD = m, CONFIG_NFSD_V3 = y, and CONFIG_SUNRPC = m.

We can use the common network connection and testing tools ping and tracerroute to test whether the network connection and speed are normal. The normal network connection is the foundation of NFS. The rpcinfo command is used to display the system's RPC Information. Generally, the-p parameter is used to list the RPC service of a host. When you use the rpcinfo-p command to check the server, you can see portmapper, status, mountd nfs, and nlockmgr. When you use this command to check the client, you should be able to see at least the portmapper service.

1.2 NFS error message

The NFS error information is shown in the following table.

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