[-] *** [-] * [-] * 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 pg Building native extensions. This Could take a while... Successfully installed pg-0.13.2 1 gem installed Installing ri documentation for pg-0.13.2... Installing RDoc documentation for pg-0.13.2...
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