$(1)$ Can you join a Linux machine to Active directory? How would you perform this action?

$(2)$ How does Linux connect to Active Directory?

$(3)$ What is realmd in Linux?

$(4)$ What is the sudo systemctl command?

$(5)$ What is the sudo systemctl command?

$(6)$ What is the sudo apt$-$get update command?

$(7)$ What is sudoers?