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merge.pl file_1 a,b,c file_2 d,e,f


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#DFD ' '
#H Period Interface SrcRouter Subset MbitsCap Polls MbpsIn 
MbpsOut MbpsSum InMinUtil In5pUtil InAvgUtil In95pUtil InMaxUtil 
InUtilSD InMaxTS OutMinUtil Out5pUtil OutAvgUtil Out95pUtil 
OutMaxUtil OutUtilSD OutMaxTS EffMinUtil Eff5pUtil EffAvgUtil 
Eff95pUtil EffMaxUtil EffUtilSD EffMaxTS Class InPctDiscards 
InPctErrors InPctDiscErr InPctDiscErr95Q OutPctDiscards 
OutPctErrors OutPctDiscErr OutPctDiscErr95Q SecSysUpTime 
InWrapEvts InWrapCnts OutWrapEvts OutWrapCnts PctPollsGT80pUtil 
PctPollsGT1pDiscErr Flags KppsIn KppsOut IfDescr IfIndex
#F %-17s %-35s %-15s %-6s %9.5f %7d %14.3f %14.3f %14.3f %7.3f 
%7.3f %7.3f %7.3f %7.3f %9.5f %14s %7.3f %7.3f %7.3f %7.3f %7.3f 
%9.5f %14s %7.3f %7.3f %7.3f %7.3f %7.3f %9.5f %14s %3s %7.3f 
%7.3f %7.3f %7.3f %7.3f %7.3f %7.3f %7.3f %10d %7d %7d %7d %7d 
%7.3f %7.3f %-10s %14.3f %14.3f %-30s %-10s

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create a hash whose keys are any of the headers specified on the 
command line. Each key value is a reference to an array containing 
the data from each column.

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create another hash whose keys are any of the headers specified 
on the command line. Each key value is a reference to an array 
containing the data from each column.

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the column "SrcRtr" from file_1 contains the exact same data as the 
column "DstDev" in file_2

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