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  1. or download this
    system ("su -l - $user -c \'$action > DBlist.txt && cat DBlist.txt\'")
    +;
    
  2. or download this
    system ("su -l - MyRealuser -c \'$action > DBlist.txt && cat DBlist.tx
    +t\'");
    
  3. or download this
    print ">>>$user<<<\n";
    
  4. or download this
    >>>some_username<<<
    
  5. or download this
    >>>some_username
    <<<
    
  6. or download this
    chomp(my $user = $line);
    
  7. or download this
    while(my $exec_line = <EXEC>) {
        ...
    ...
            ...
        }
    }