cd /stage/classes/archive/2014/spring/15400/p4shell/mpich-3.1/
pwd;ls;pwd;ls -l;
 pwd; ls ; pwd; ls -l ;
pwd;ls ;pwd ;  ls   -l  ;
 pwd	;	ls ; pwd	;	ls -l ; 
pwd;ls;pwd;ls -l
 pwd; ls ; pwd; ls -l 
pwd;ls ;pwd ;  ls   -l 
 pwd	;	ls ; pwd	;	ls -l 
;; 	;;
 ;	; ;	;
pwd;ls;;;pwd; ; ;ls -l
 pwd; ls ; ; ;;; pwd; ls -l 
pwd argv1 argv2; ls
cd /stage/classes/archive/2014/spring/15400/p4shell/mpich-3.1/; cd /stage/classes/archive/2014/spring/15400/p4shell/mpich-3.1/afolderdoesnotexist;  ls ; pwd argv3; pwd
exit
