wget https://Kali.sh/metasploit.sh
chmod -R 0755 metasploit.sh
./metasploit.sh

metasploit-framework : Depends: ruby (<= 1:2.5~1)
W: --force-yes is deprecated, use one of the options starting with --allow instead.
E: Unable to correct problems, you have held broken packages.

ruby -v

sudo apt-get install ruby-switch
ruby -v