I have a txt file that I need to analyze for matching strings of numbers/text. (Its actually for looking for multiple routes in a routing table, but that shouldnt confuse the issue) So, for instance, I need to search through the file and find lines such as this: 
10.35.15.64/29     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.15.96/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.2.128/25     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.24.192/26    10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.24.48/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.25.128/25    10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.25.32/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.25.48/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.25.64/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.25.80/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.26.0/28      10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.26.16/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.26.192/26    10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.26.32/27     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.26.64/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.26.96/27     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.8.128/27     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.8.192/27     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.35.9.128/28     10.133.3.11     OSPF-EXT1     3        if-servermgm
+t.cntx03-servermgmt-10.133.3.11

[download]
and print out the lines that match before the first space: 
10.1.17.0/24       10.133.3.11     OSPF-EXT2     20       if-servermgm
+t.cntx03-servermgmt-10.133.3.11
10.1.17.0/24       10.133.3.7      OSPF-EXT2     20       if-servermgm
+t.cntx03-servermgmt-10.133.3.7

[download]
I havent started writing my code, but I would be willing to bet someone knows a command line string of perl commands that will do this. Any thoughts?

In reply to Searching for two lines that begin with the same string by tgrossner

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