I was recently setting up a new, always-on machine that I do occasional dev work. This dev work typically consists of routine maintenance and, a requirement of that, is sshing into and running software updates on manually managed servers (yes, manually managed1).
I sync my
.ssh configuration using mackup. However, while setting up and then using a key I received a warning that my configured
.ssh directory permissions were too open. If you ever run into this, the solution is fairly simple2:
chmod 700 ~/.ssh chmod 644 ~/.ssh/id_rsa.pub chmod 600 ~/.ssh/id_rsa
Try reconnecting using the key in question and the warning should be resolved.