Whenwespeakofthecommandline,wearereallyreferringtotheshell.Theshellisaprogramthattakeskeyboardcommandsandpassesthemtotheoperatingsystemtocarryout.AlmostallLinuxdistributionssupplyashellprogramfromtheGNUProjectcalledbash.Thename“bash”isanacronymfor“BourneAgainSHell”,areference