First step in Installation process is to install the supplied Enterprise Linux Operating system. The supplied DVD has Cent OS (as on date Version 5.10) and is a bootable DVD. Installation from the DVD can be done as follows:

1. Insert the supplied Cent OS DVD into the DVD drive in Server. The system will boot up and bring up the following screen:

2. Press Enter to proceed. That will bring up the following screen.

3. Choose Skip and move on. That will bring up the following screen:

4. Click on Next to proceed. That will bring up the following:

5. Choose English language and click on Next. That will bring up the following screen:

6. Select English and click on Next. That will bring up the following dialog (if the old partition is non-readable):

7. Click on Yes and then on Next. That will bring up the following:

8. In above Window, select Create custom layout. Click on Next to bring up the following screen.

9. We need to create the partitions as given in the following table:

10. Create new partitions as follows:
    • Click on the Free line in above dialog.
    • Click on New button. That will bring up the following dialog

• In the Mount Point edit box, enter directory of partition to be created (e.g., /home)
• To create a Swap partition, select swap from the File System Type list box.
• In the Size (MB) edit box, enter the size of the partition to be created. To use up all available rest of free space, select Fill to maximum allowable size.
• Click on OK.

11. After creating the partitions, the partition table should look like the following:

12. Click on Next to continue. That will bring up the following Window:

13. Click on Next to get the following screen:

14. For all interfaces detected (there must be at least two of them), click on Edit and specify a Private IP address in your LAN range. This IP address must not be assigned to any other machine in the Network.

15. Click on Manual Configuration Radio button.
16. Specify IP address in IP Address edit field.
17. Specify the Network mask in Prefix (Netmask) edit field.
18. Cick on OK.
19. Specify Host name by clicking on manually Radio button and set a fully qualified host name (including domain name) for the server.
20. Specify Gateway IP address in Gateway: field. If Rainmail Server is to be deployed in Gateway mode, this field can be ignored.
21. Specify the Primary DNS Server as 8.8.8.8 in the Primary DNS: edit field.
22. Specify the Secondary DNS Server as 8.8.4.4 in the Secondary DNS: edit field.
23. Now the screen will look like the following:

24. Click on Next. That will bring up the following screen:

25. Select the time zone (India is represented by Asia/Kolkatta) and click on Next. It will bring up the following screen.

26. Specify the root password and click on Next. That will bring up the following:

27. In addition to whatever is selected by default, check Desktop - KDE box.
28. Click on Next. That will bring up the following screen

29. Click on Next to start the installation. When the installation is complete, following screen will be displayed.

30. Click on Reboot button. The system will reboot and on rebooting will present the following screen

31. Click on Forward button. That will bring up the following screen

32. Select Disabled from Firewall list box.
33. Click on Forward button.
34. In the dialog that comes up, click Yes. That will bring up the following:

35. Select Disabled from the SELinux Setting list box.
36. Click on Forward button.
37. Click Yes in the dialog that comes up. That will bring up the following:

38. Click on Forward to proceed. That will bring up the following

39. In the Create User Window that comes up, do not enter any details and click on Forward to proceed. That will bring up the following dialog

40. In the dialog that comes up, click on Continue button. That will bring up the following screen

41. In the Sound Card Window that comes up, click on Forward button. That will bring up the following screen:

42. Click on Finish to continue.
43. In the dialog that comes up, click on OK. That will reboot the system. This completes the Installation of Operating System.