$ command [[-]option(s)] [option argument(s)] [command argument(s)]
1.Linux三大查询命令man,info,–help
man ls man passwd info pwd who --help
man page:manual page 2.uname(short for unix name) parameter: -n(-nodename) -p(-processor) 3.cal command is a calendar command in Linux which is used to see the calendar of a specific month or a whole year. 4.
CommandInterpretationpwdprint working directorymkdirmake directorycdchange directoryrmdirremove(empty)directory