perl 命令行参数

[root@cdn conf]# perl -MData::Dumper -e 'print Dumper \@ARGV'
$VAR1 = [];
[root@cdn conf]# perl -MData::Dumper -e 'print Dumper \@ARGV' a b
$VAR1 = [
          'a',
          'b'
        ];
[root@cdn conf]# perl -w -MData::Dumper -e 'print Dumper \@ARGV' a b
$VAR1 = [
          'a',
          'b'
        ];
[root@cdn conf]# perl -MData::Dumper -e 'print Dumper \@ARGV' a b -w
$VAR1 = [
          'a',
          'b',
          '-w'
        ];
[root@cdn conf]# perl -e 'print "$$\n"'
10179
[root@cdn conf]# perl -e "print "$$\n""
Bareword found where operator expected at -e line 1, near "10085n"
        (Missing operator before n?)
syntax error at -e line 1, next token ???
Execution of -e aborted due to compilation errors.
[root@cdn conf]#