Install CentOS

1. Put up the CentOS 6.6 in the DVD drive
2. Select "Install or upgrade existing system"
3. Skip the disk check
4. Click "Next"
5. Allocate partitions accordingly
6. Reasonable root and home space,swap space and 1024 MB of /boot space
7. Click on "Basic Server" and select "Customize Now"
8. Select all the required packages for CentOS needed by your institution
9. Click on "Install Now"
10. After installing click on "Reboot"
11. For more details refer here