to reproduce the error (you should backup your ~/.ssh/authorized_keys file):
eval "$(gpg-agent --daemon --enable-ssh-support)" ssh-keygen -C "test key" -f test_key ssh-add test_key cat test_key.pub > ~/.ssh/authorized_keys ssh localhost
to reproduce the error (you should backup your ~/.ssh/ authorized_ keys file):
eval "$(gpg-agent --daemon --enable- ssh-support) " authorized_ keys
ssh-keygen -C "test key" -f test_key
ssh-add test_key
cat test_key.pub > ~/.ssh/
ssh localhost