Perl 中文教程  

http://cn.perlmaven.com/perl-tutorial

learning perl in about 2 hours 30 minutes

http://qntm.org/files/perl/perl.html

china unix 

http://bbs.chinaunix.net/forum-25-1.html

http://bbs.chinaunix.net/thread-159016-1-1.html

知乎

https://www.zhihu.com/question/20317871

https://www.zhihu.com/question/19647485