add a public key for new host to ssh aws ec2

log

1. make a new public on local host (generate public key under ~/.ssh)

 cd
 ssh-keygen -t rsa -b 1024

2. copy the output of the following cat.

 cat ~/.ssh/id_rsa.pub

3. ssh to your aws ec2 and paste it to ~/.ssh/authorized_keys2 (a new file)

4. chmod 640 ~/.ssh/authorized_keys2

5. go back to your local host and try to ssh it.

make sure the username is the same as the one you put public key on it's ~/.ssh directory.