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use .ssh file to login the server
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No, just no. You don't call your 'public' key 'open'. It's public.
instead of running that command, you can use your ~/.ssh/config
ie:
Host myhostname
HostName 172.16.1.99
Port 9999
IdentityFile ~/.ssh/my_private_ssh_key
User root
so you can log in like this:
ssh myhostnameps (for those of you who are interested): before being able to log in like that, you should have your public key your on remote server's ~/.ssh/authorized_keys file.
a simple way of doing it would be:
cat ~/.ssh/my_public_ssh_key | ssh -p 9999 -l root 172.16.1.99 'cat >> ~/.ssh/authorized_keys'