Shell Programming and Scripting

awk 'FNR==NR>1{a[$1,$2,$3,$4,$5,$6,$7]=$0;next}{if(b=a[$1,$2,$3,$4,$5,$6,$7]){print b}}' file1.txt file2.txt > output.txt 
-bash: $'\342\200\213awk': command not found

yyyyy,yyy	Chr	Start	End	Ref	Alt	Func.refGene
yyyyy,yyy	22	40757228	40757228	A	C	intronic
yyyyy,yyy	5	125887715	125887715	T	G	exonic
yyyyy,yyy	5	125880589	125880589	T	C	UTR3
xxxxxxx,xxx	1111111	Chr	Start	End	Ref	Alt	Func.refGene
xxxxxxx,xxx	1111111	1	43394661	43394661	A	G	exonic
xxxxxxx,xxx	1111111	2	166870221	166870221	A	C	intronic

yyyyy,yyy 	0	22	40757228	40757228	A	C	likely benign
yyyyy,yyy  0	5	125887715	125887715	T	G	likely benign
yyyyy,yyy	0	5	125880589	125880589	T	C	likely benign

yyyyy,yyy	Chr	Start	End	Ref	Alt	Func.refGene
yyyyy,yyy	22	40757228	40757228	A	C	intronic likely benign
yyyyy,yyy	5	125887715	125887715	T	G	exonic likely benign
yyyyy,yyy	5	125880589	125880589	T	C	UTR3 likely benign

awk '
        BEGIN {
                print "yyyyy,yyy        Chr     Start           End             Ref     Alt     Func.refGene"
        }
        NR == FNR && !/Chr/ {
                A[$1 FS $3 FS $4 FS $5 FS $6 FS $7] = $(NF-1) FS $NF
                next
        }
        !/Chr/ && ( ( $1 FS $2 FS $3 FS $4 FS $5 FS $6 ) in A ) {
                print $0, A[$1 FS $2 FS $3 FS $4 FS $5 FS $6]
        }
' file1 file2

awk '
  NR==FNR {
    A[$1,$3,$4,$5,$6,$7]=$8
    next
  }
  ($1,$2,$3,$4,$5,$6) in A {
    print $0, A[$1,$2,$3,$4,$5,$6]
  }
' FS='\t' file1 file2