If we try to use the showmount command from the nfsclient, we should be able to list exports on the remote NFS server. The syntax will be as follows:
$ showmount -e 192.168.10.10
The command and the corresponding error are shown in the following screenshot:
At this stage, we can choose from the following options:
Pack our bags and go home, perhaps it will be better tomorrow
Google the error
Debug the error ourselves
Now, Google is often really good at helping us, but you fail to learn fault-finding techniques, so let's opt out of option 3 and install the tcpdump command-line packet analyzer so that we can see what is happening. This can be installed on nfsclient using yum as follows:
$ sudo yum install -y tcpdump
To capture network traffic between the nfsclient and the nfshost and to print port numbers that are being accessed, we can use the following command:
$ sudo tcpdump -nn -i enp0s8 host 192.168.10.10
The options to tcpdump used here...