You may be trying to do some advanced networking in Kali. The tutorial you are following says: “type rfkill block all.” You try, and are presented with: an ERROR MESSAGE!? Don’t panic, there is an easy way to install rfkill in Kali Linux.
Start Kali Linux and open a terminal.
Type: apt-get install rfkill
Kali Linux will now check its databases and ask if you want to install rfkill. Type y for yes.
Kali Linux will now finish the process of installing rfkill. Never stop an installation once it has started! This might ruin Kali.
Finished, thank you for viewing!