In Linux, manpages are a huge source of information on usage of a particular command. Often while reading manpages, you come across a reference to a particular section, like crontab(5). The 5 refers to the specific page, and can be accessed as:
man 5 crontab
Joel G Mathew, known in tech circles by the pseudonym Droidzone, is an opensource and programming enthusiast.
His favorite pastime is grappling with GNU compilers, discovering newer Linux secrets, writing scripts, hacking roms, and programs (nothing illegal), reading, blogging. and testing out the latest gadgets.
When away from the tech world, Dr Joel G. Mathew is a practising ENT Surgeon, busy with surgeries and clinical practise.