FIRST STEP
service postgresql start
service metasploit start
service metasploit stop ( turn to the third step if once you done it )

SECOND STEP
msfdb init

MSF_DATABASE_CONFIG

THIRD STEP 

/etc/init.d/postgresql start

armitage

PROBLEM SOLVE

apt-get cleanup
apt-get update && apt-get upgrade

如果更新源不能生效，可以手动下载更新包安装

1. head over to http://www.fastandeasyhacking.com/download and download the tgz file
2. cd /root/Downloads
3. tar -xf armitage150813.tgz
4. now head over to usr/share/armitage and replace all the files in that folder with you files you just downloaded and extracted.
5. reboot

运行Armitage前还需要执行 /etc/init.d/postgresql start  初始化数据库，否则会提示出错。