If you are trying to prepare for Linux certification, then the link given by centOsboy is very helpful. But if you trying to get an idea of linux for the timebeing, then maybe we can suggest you the order of the server configurations that you can go for.
After installing linux OS, go for FTP first.
b) YUM (usually it comes pre-configured with RHEL-5 onwards)
i) LVM / RAID
Not sure about Http and SSH server configuration, so can't suggest on these. Maybe, if somebody can give a more clear idea on this.