#perl#一次virtualbox引发的血案
利用ubuntu的appstore安装virtualbox，但是在运行的时候提示无法载入内核，于是想先卸载然后在网上寻找解决方案，卸载之后安装任何东西就会出现如下大段的错误：
Subroutine warnings::warnif redefined at /usr/share/perl/5.14/fields.pm line 11. debconf: Perl may be unconfigured (Can't locate warnings/register.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .) at /usr/share/perl/5.14/overload.pm line 147. BEGIN failed--compilation aborted at /usr/share/perl/5.14/overload.pm line 147. Compilation failed in require at /usr/share/perl5/Debconf/Template.pm line 341. BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Template.pm line 341. Compilation failed in require at /usr/share/perl5/Debconf/Question.pm line 8. BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Question.pm line 8. Compilation failed in require at /usr/share/perl5/Debconf/Config.pm line 7. BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Config.pm line 7. Compilation failed in require at /usr/share/perl5/Debconf/Log.pm line 10. Compilation failed in require at (eval 1) line 4. BEGIN failed--compilation aborted at (eval 1) line 4. ) -- aborting 正在设置 man-db (2.6.1-2ubuntu1) ... Subroutine warnings::warnif redefined at /usr/share/perl/5.14/fields.pm line 11. Can't locate warnings/register.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .) at /usr/share/perl/5.14/overload.pm line 147. BEGIN failed--compilation aborted at /usr/share/perl/5.14/overload.pm line 147. Compilation failed in require at /usr/share/perl5/Debconf/Template.pm line 341. BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Template.pm line 341. Compilation failed in require at /usr/share/perl5/Debconf/Question.pm line 8. BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Question.pm line 8. Compilation failed in require at /usr/share/perl5/Debconf/Config.pm line 7. BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Config.pm line 7. Compilation failed in require at /usr/share/perl5/Debconf/Log.pm line 10. Compilation failed in require at /usr/share/perl5/Debconf/Db.pm line 7. BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Db.pm line 7. Compilation failed in require at /usr/share/debconf/frontend line 6. BEGIN failed--compilation aborted at /usr/share/debconf/frontend line 6. dpkg：处理 man-db (--configure)时出错： 子进程 已安装 post-installation 脚本 返回了错误号 2 在处理时有错误发生： man-db E: Sub-process /usr/bin/dpkg returned an error code (1)
上面错误提示的大概意思就是说，dpkg在安装软件的时候出现了错误，于是上网查询发现下面的命令
sudo dpkg --configure -a sudo apt-get install -f
第一个命令是重新启动dpkg
第二个命令是修复apt-get install
the problem of a broken package still exist the solution is to edit the dpkg status file manually.
sudo nano /var/lib/dpkg/status
也就是说，直接编辑dpkg的管理配置文件，将出问题的包删掉。
很不幸，还是继续出现相同的问题，于是仔细研究上面的错误提示，发现是perl语言的编译错误，具体原因就是在代码里面引用了不存在的变量，解决办法就是一个一个的删掉这些不存在的变量引用，最后解决了所有的问题。
现在的问题是，
perl debconf, dpkg
man-db, doc-base
都是些什么东西。
dpkg: debian 系统软件管理工具
此处待续
OK，现在终于解决了半路跳出来的问题，下面该解决最开始的我问题，也就是运行virtualbox的时候下面的错误提示
virtual-box
* No suitable module for running kernel found
搜索之后，根据下面的链接
http://askubuntu.com/questions/126175/virtualbox-doesnt-load-after-12-04-upgrade
http://ubuntuforums.org/showthread.php?t=2082084
以及里面的提示，终于解决了问题。
I had a similar problem. Here is what worked for me:This may be required if you get a kernel sources not found type of error:
sudo apt-get install build-essential linux-headers-`uname -r`
Then reconfigure the relevant packages to kick them in to rebuilding.
sudo dpkg-reconfigure virtualbox-dkms sudo dpkg-reconfigure virtualbox