How to manage host in Linux?

54.How to manage host in Linux?
Ans.
1. On the hosts tab of the network configuration tool, we can add, edit or remove hosts from the ‘/etc/hosts’ file.

2. The file contains IP addresses and their corresponding hostnames.

3. In the Enterprise Linux choose Application--> System settings --> network.

4. Click the hosts tab from the Network configuration dialog box.

5. Click new from the toolbar to open the ‘add/edit hosts entry’ dialog box.

6. Enter the hostname and its IP address, if there is an alias for the host-name, enter it as well.

7. Click ok to add the entry to the list.

8. Choose file-save to save your changes.

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Explain process of setting up a NIC (Network interface card).

44.Explain process of setting up a NIC (Network interface card). Ans. 1. Network interface card (NIC) can be set-up by configuring the network card and internal network. 2. Before configuring network card we must check loopback (IP address 127.0.0.1) is working. 3. Even if the compute is not connected to outside network internet network configuration is required for some applications. This address is known as loopback device, and its IP address is 127.0.0.1 4. To check loopback device is configured or not, we use ‘ifconfig’ command it shows a device called ‘lo’ with the address 127.0.0.1, if this device and address is not shown there then loopback is not configured. 5. To configure it we can use command ifconfig lo 127.0.0.1 after that we need to use the ‘route’ command to give system a little more information about this interface for this ‘route add –net 127.0.0.0’ command is used, after this loopback is setup. 6. To configure a network card we will use ifconfig co...

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List and explain all NFS server commands.

65.List and explain all NFS server commands. Ans. 1. exportfs: a) The exportfs command enables user to manipulate the list of current exports without editing /etc/exports. b) It also maintains the list of currently exported file system in /var/lib/nfs/etab. Example: The exportfs –a command initializes /var/lib/nfs/etab, synchronizes it with the contents of /etc/exports. c) To add a new export to etab and also /etc/exports the syntax is : #exportfs –o opts hostdir d) Example: #exportfs –o sync,rw 192.168.166.7:/demo The above command exports the directory /demo to client 192.168.166.7 with export option rw and sync. e) –v option of this command, lists currently exported filesystem. Example: #exportfs –v f) –u options unexports the filesystem as follow: Example: #exportfs –u 192.168.166.7:/demo 2. showmount: a) The showmount command provides information about clients and the file systems they have mounted. b) Syntax is : #showmount [-advhe] [host] ...

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