Further reading

• Installing Metasploitable 2: https://metasploit.help.rapid7.com/docs/metasploitable-2
  
• Building Metasploitable 3: https://github.com/rapid7/metasploitable3
• Full Metasploitable 3 download (6 GB file): https://mega.nz/#!XQxEAABQ!frdh5DgZE-tSb_1ajPwLZrV4EZuj1lsS3WlWoLPvBjI