SSH: Configure ssh_config to use specific key file for a specific server fingerprint
Solution 1:
You can use wildcards in a Host
section in ~/.ssh/config
. If you use EC2's hostname to connect to your instances the following should work:
Host *.compute-1.amazonaws.com
IdentityFile ~/.ssh/id_rsa.aws
# If you don't want to verify host fingerprints because they change all the time
CheckHostIP no
StrictHostKeyChecking no
UserKnownHostsFile /dev/null
If you use the IP addresses you'll have to find the right IP ranges and add appropriate wildcard entries to match those.
Solution 2:
Try if this works for you: add to ~/.ssh/config
file the following:
Host alias_for_host_you_want_to_connect
HostName real_name_for_host_you_want_to_connect
CheckHostIP no
IdentityFile /path/to/your/keyfile
#StrictHostKeyChecking no
(comment out the last line if everything else fails)