I have obtained RHCT cert. at 2006. The RHCe course is completed. After the graduation what I found is, the knowledge of certifications is not enough to apply in system admin like job. There are much more cocepts/knowledge/tricks used in job world, and I even dont know those terms even(outside RHCE cooncepts)... How can I be in touch with linux's technical ideas/knowledge specific for jobs, considering that I am not employed yet