Don Myers, enter each of the shown lines completely, one after the other, into a terminal window and press Enter after each line.
sudo su -
You will get asked for your password, after entering it correctly you will get a root prompt, which means that all subsequent commands in this terminal will get executed as root.
Then enter the next line completely (copy and paste it into the terminal):
for file in /etc/init/*.conf; do sed -i 's/^console output/\#console output/' $file; done
This line executes the sed command in a loop, applying it to each .conf file in the /etc/init/ directory.
After that, enter
to get out of the root console back into normal mode.