Backtrack5中metasploit安装pg(Metasploit now requires version 0.11 or higher of the 'pg' gem for ...)

最近更新Metasploit后，启动时出现如下错误：

[-] ***[-] *[-] * Metasploit now requires version 0.11 or higher of the 'pg' gem for database support[-] * There a three ways to accomplish this upgrade:[-] * 1. If you run Metasploit with your system ruby, simply upgrade the gem:[-] *    $ rvmsudo gem install pg [-] * 2. Use the Community Edition web interface to apply a Software Update[-] * 3. Uninstall, download the latest version, and reinstall Metasploit[-] *[-] ***[-] [-] [-] Failed to connect to the database: Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (RubyGem version error: pg(0.9.0 not ~> 0.11)

这个错误说明msf使用的pg版本过低，但是由于Backtrack中有两个ruby版本，一个是系统自带的，一个是msf自带的。所以我们要确保更新的是msf使用的那个ruby环境中的pg。只需在msf启动之后执行安装pg即可。

msf > gem install pg[*] exec: gem install pgBuilding native extensions.  This could take a while...Successfully installed pg-0.13.21 gem installedInstalling ri documentation for pg-0.13.2...Installing RDoc documentation for pg-0.13.2...