// syntax for help command $help [-dms] [sample ...] The sample specified in the syntax higher than refers to the command about which you want to to learn and whether it is matched with any shell crafted-in command then help give particulars over it and when It isn't matched then https://redhat-9-repository-url31664.webbuzzfeed.com/23947318/5-simple-statements-about-linux-it-explained