EasierUVM安装问题

perl包安装

EasierUVM需要安装File::Copy::Recursive,File::stat, and Time::Piece modules.这几个PERL 包，官方文档给的安装命令是

perl -MCPAN -e 'install File::Copy::Recursive'
perl -MCPAN -e 'install File::stat'
perl -MCPAN -e 'install Time::Piece'

如果没有CPAN工具，要先装CPAN。

很不幸，安装出错，说是YAML没有安装，

Warning (usually harmless): 'YAML' not installed, will not store persistent state
Running install for module 'Module::Build'
'YAML' not installed, falling back to Data::Dumper and Storable to read prefs '/root/.cpan/prefs'
Running make for L/LE/LEONT/Module-Build-0.4229.tar.gz

然后我再命令行中安装YMAL

yum install -y *YAML*

又说没法下载包

Error Downloading Packages:
  libyaml-0.1.3-4.el6_6.x86_64: failure: libyaml-0.1.3-4.el6_6.x86_64.rpm from RPM_Packx64: [Errno 256] No more mirrors to try.
  perl-YAML-Syck-1.07-4.el6.x86_64: failure: perl-YAML-Syck-1.07-4.el6.x86_64.rpm from RPM_Packx64: [Errno 256] No more mirrors to try.
  perl-YAML-Tiny-1.40-2.el6.noarch: failure: perl-YAML-Tiny-1.40-2.el6.noarch.rpm from RPM_Packx64: [Errno 256] No more mirrors to try.

我发现其实系统上装了一个YAML了，然后我把这个YAML卸载了，

yum erase *YMAL*

然后我打开CPAN，在命令行输入cpan，然后安装YMAL，成功了

# cpan
cpan> install YMAL

安装YMAL中间有好多warning，不管，一路确定，执行完没有错误，然后再执行EasierUVM给的安装perl包的命令，

perl -MCPAN -e 'install File::Copy::Recursive'
perl -MCPAN -e 'install File::stat'

这样perl包就安装成功了