“Kali Linux is an open source project that is maintained and funded by Offensive Security, a provider of world-class information security training and penetration testing services.
In addition to Kali Linux, Offensive Security also maintains the Exploit Database and the free online course, Metasploit Unleashed.
For i386 and amd64 architectures,
a minimum of 512MB RAM.
10 GB disk space for install”
-(KALI linux site)