SSH keygen steps

new_ssh.sh

#make ssh directory
mkdir ~/.ssh
#change mode to 700
chmod 700 ~/.ssh

#Generate new Key
ssh-keygen -b 2048 -t rsa -f [keyname] -P ["password"] # "" for passwordless key.. this is unsafe
#Default Key.
ssh-keygen -b 2048 -t rsa -f id_rsa -P ["password"]

#Add public key to ssh_pubs directory
cp .ssh/*.pub .ssh/ssh_pubs/

#Get Key contents
cat [keyname].pub
#Default Key.
cat id_rsa.pub

#Add Key to ~/.ssh/authorized_keys file
#allow write on keys file
chmod u+w authorized_keys
#add Key
echo id_rsa.pub >> authorized_keys
#when done make read only
chmod u-w authorized_keys

#to force key, use
ssh -i /.ssh/[keyname] user@server.host

#~/.ssh/config SSH Client Configuration
#Add both host names and their identity file:

Host server.host
  IdentityFile ~/.ssh/keyname
Host OSXserv.local
  IdentityFile ~/.ssh/id_rsa