grep练习问题
[root@localhost   ~]#   cat   grepEx
Steve   Blenheim:238-923-7366:95   Latham   Lane,   Easton,   PA   83755:11/12/56:20300
Igor   Chevsky:385-375-8395:3567   Populus   Place,   Caldwell,   NJ   23875:6/18/68:23400
Norma   Corder:397-857-2735:74   Pine   Street,   Dearborn,   MI   23874:3/28/45:245700
Jennifer   Cowan:548-834-2348:583   Laurel   Ave.,   Kingsville,   TX   83745:10/1/35:58900
Jon   DeLoach:408-253-3122:123   Park   St.,   San   Jose,   CA   04086:7/25/53:85100
Karen   Evich:284-758-2857:23   Edgecliff   Place,   Lincoln,   NB   92086:7/25/53:85100
Karen   Evich:284-758-2867:23   Edgecliff   Place,   Lincoln,   NB   92743:11/3/35:58200
Karen   Evich:284-758-2867:23   Edgecliff   Place,   Lincoln,   NB   92743:11/3/35:58200
Fred   Fardbarkle:674-843-1385:20   Parak   Lane,   DeLuth,   MN   23850:4/12/23:780900
Fred   Fardbarkle:674-843-1385:20   Parak   Lane,   DeLuth,   MN   23850:4/12/23:780900
Lori   Gortz:327-832-5728:3465   Mirlo   Street,   Peabody,   MA   34756:10/2/65:35200
Paco   Gutierrez:835-365-1284:454   Easy   Street,   Decatur,   IL   75732:2/28/53:123500
Ephram   Hardy:293-259-5395:235   CarltonLane,   Joliet,   IL   73858:8/12/20:56700
James   Ikeda:834-938-8376:23445   Aster   Ave.,   Allentown,   NJ   83745:12/1/38:45000
Barbara   Kertz:385-573-8326:832   Ponce   Drive,   Gary,   IN   83756:12/1/46:268500
Lesley   Kirstin:408-456-1234:4   Harvard   Square,   Boston,   MA   02133:4/22/62:52600
William   Kopf:846-836-2837:6937   Ware   Road,   Milton,   PA   93756:9/21/46:43500
Sir   Lancelot:837-835-8257:474   Camelot   Boulevard,   Bath,   WY   28356:5/13/69:24500
Jesse   Neal:408-233-8971:45   Rose   Terrace,   San   Francisco,   CA   92303:2/3/36:25000
Zippy   Pinhead:834-823-8319:2356   Bizarro   Ave.,   Farmount,   IL   84357:1/1/67:89500
Arthur   Putie:923-835-8745:23   Wimp   Lane,   Kensington,   DL   38758:8/31/69:126000
Popeye   Sailor:156-454-3322:945   Bluto   Street,   Anywhere,   USA   29358:3/19/35:22350
Jose   Santiago:385-898-8357:38   Fife   Way,   Abilene,   TX   39673:1/5/58:95600
Tommy   Savage:408-724-0140:1222   Oxbow   Court,   Sunnyvale,   CA   94087:5/19/66:34200
Yukio   Takeshida:387-827-1095:13   Uno   Lane,   Ashville,   NC   23556:7/1/29:57000
Vinh   Tranh:438-910-7449:8235   Maple   Street,   Wilmington,   VM   29085:9/23/63:68900


问题一   打印生日在12月的所有行！
问题二   打印电话区号   为   408   的   所有行！

我的答案是    
1        
[root@localhost   ~]#   grep   ':12/ '   grepEx
James   Ikeda:834-938-8376:23445   Aster   Ave.,   Allentown,   NJ   83745:12/1/38:45000
Barbara   Kertz:385-573-8326:832   Ponce   Drive,   Gary,   IN   83756:12/1/46:268500


2
[root@localhost   ~]#   grep   ':834- '   grepEx
James   Ikeda:834-938-8