1: Is there a way to log in to an AWS instance without using key pairs? I want to set up a couple of sites/users on a single instance. However, I don\'t want to give out key
Answer to Question 1
Here's what I did on a Ubuntu EC2:
A) Login as root using the keypairs
B) Setup the necessary users and their passwords with
# sudo adduser USERNAME
# sudo passwd USERNAME
C) Edit /etc/ssh/sshd_config setting
PasswordAuthentication yes
PermitRootLogin yes
D) Restart the ssh daemon with
# sudo service ssh restart
just change ssh to sshd if you are using centOS
Now you can login into your ec2 instance without key pairs.