Collection and a list of basic linux commands [part II]

Continue from collection-and-list-of-basic-linuxjjoin = join line in common fieldkkill = Terminate running processeskillall = Terminate the process by namelless = Display output one screen at a timelet = Perform arithmetic on shell variablesln = Create relationships between fileslocal = Creating variableslocate = Find filelogname = Print login namelogout = Exit a login shelllook = Display lines