This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I haven't used Scientific Linux. But all the mousetech.com servers are CentOS and have been for several years. They have run very reliably, and CentOS is pretty prompt at tracking new RHEL releases, so I have several useful growth options should anyone start paying me enough to justify buying technical support.
An IDE is no substitute for an Intelligent Developer.