Updating Ruby gems

[hightech]

Hey guys,
I updated metasploit via fasttrack. When I try to set the db_driver to mysql it says

[*] Active Driver: sqlite3[*] Available: sqlite3[*] DB Support: Enable the mysql driver with the following command:[*] $ gem install mysql

So, I tried "gem install mysql" via terminal and that gives me a problem

ERROR: could not find gem mysql locally or in a repository

my gem list ony shows

*** LOCAL GEMS ***

baffle (0.2.1)
dot11 (0.1.0)
exegesis (0.2.6)
facets (2.5.2)
httpclient (2.1.4, 2.1.3.1)
ip (0.2.2)
pNet-DNS (1.0.2)
postgres-pr (0.5.0)
rb-lorcon (0.1.0)
rb-pcap (0.1.0)
rest-client (1.0)
wxruby (2.0.1)

Next I try "gem update --system" and that gives me an erorr aswell

ERROR: While executing gem ... (RuntimeError)
gem update --system is disabled on Debian. RubyGems can be updated using the official Debian repositories by aptitude or apt-get.

My question is how do I set metasploit to use mysql for a database ( trying to use armitage). Im running backtrack 4 final. Thanks

[dec1bel]

I had this problem with an installation of Metasploit on an install of Ubuntu and haven't quite figured it out, but things should be set up properly to use MySQL in Metsploit on BT4R2.

To update ruby gems try

gem help update