This directory (and version of CentOS) is depreciated. For normal users, you should use /6/ and not /6.3/ in your path. Please see this FAQ
concerning the CentOS release scheme:
If you know what you are doing, and absolutely want to remain at the 6.3
level, go to http://vault.CentOS.org/ for packages.
Please keep in mind that 6.0, 6.1, 6.2 and 6.3 no longer gets any updates, nor any security fix’s.
Is CentOS 6-6.3 really not updated anymore? Why so soon after release of
Best regards, Rafal.