查看重复的行

#!/bin/awk -f
BEGIN{
    count=1
    LastLine=""
    print_flag=5

}
{
    
    $0=tolower($0)
   
    if (  LastLine ~ $0  ){
        count=count+1
   
    }
    else
    {
        if ( count >= print_flag ) {
            print count,"from",NR-count,"to",NR-1,LastLine
            #print count,LastLine
        }
        count=1
        LastLine=$0
    }

}