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added 118 characters in body
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user218374
user218374 
awk 'FNR==NR{a[$1]++;next;}($1 in a)&&($2 in a){print}' file2 file1 

perl -lane '
   @ARGV and $h{$F[0]}++,next;
   print if @F == grep { $h{$_} } @F;
' file2 file1

awk 'FNR==NR{a[$1]++;next;}($1 in a)&&($2 in a){print}' file2 file1

awk 'FNR==NR{a[$1]++;next;}($1 in a)&&($2 in a){print}' file2 file1 

perl -lane '
   @ARGV and $h{$F[0]}++,next;
   print if @F == grep { $h{$_} } @F;
' file2 file1
Source Link
user218374
user218374 

awk 'FNR==NR{a[$1]++;next;}($1 in a)&&($2 in a){print}' file2 file1