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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Explain how to configure DHCP client?

50.Explain how to configure DHCP client? Ans. 1. Before configuring DHCP, NIC should be configured properly and recognized by the system. 2. After that it’s easy to command system to use DHCP to obtain its IP information. 3. Configuring DHCP client involves following steps : a. Open the /etc/sysconfig/networkscripts/ifcfg-eth0 file. b. Find the line bootproto=static c. Change the static to dhcp. d. Save changes. e. Restart the network by issuing command ‘service network restart’, after that system will receive its IP information from the DHCP server.

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