UNPV22 RPC Run server prompts cannot register service:RPC:Unable to receive; errno = Connection refused

Running RPC server prompt on my colinux virtual machine: Cannot register service:RPC:Unable to receive; errno = Connection refused, screenshot as follows:

The reason is that the Portmap service is not installed and started, so the solution is to install Portmap:

The first step, agt-get update, updates the source

The second step, apt-get install Portmap, installation Portmap, if the installation is successful will automatically start Portmap service, screenshot as follows:

The third step, use service--status-all View all service status, screenshot as follows:

The fourth step, let the server run in the background, successfully started, screenshot as follows:

Step fifth, start client, because on the same host, all host names using localhost, successfully return the results of the square, screenshot as follows: