Step 1: Find your Mac public key change into your ssh directory in terminal
cd ~/.ssh/
View your public key
cat id_rsa.pub
Log into your CentOS via ssh and change into your ssh directory
cd ~/.ssh/
Create a id_rsa.pub
vim id_rsa.pub
You can truncate the entire known_hosts file, or just remove the same IP/URL that your trying to connect to, for us, to keep it simple we are just going to truncate the entire file
> known_hosts
On your Mac copy the id_rsa file contents to be pasted in the next step
cat ~/.ssh/id_rsa
create or update the CentOS id_rsa file, for this example we are creating it and paste the value from the Mac
vim id_rsa
Change the permission level of this new id_rsa file to 600, or you will get warnings
chmod 600 id_rsa
Now when you try to do the connection to the remote host, you should be ready to roll
On your CentOS go ahead and try to do the remote action, in this example is a clone of a GIT repository
git clone git@10.10.10.10:magentoEE113 /var/www/html/clone/