cannot use sudo on ubuntu server passwordless authentication?

Posted by Lucas Crijns on Ask Ubuntu See other posts from Ask Ubuntu or by Lucas Crijns
Published on 2014-08-22T15:30:44Z Indexed on 2014/08/22 16:36 UTC
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Hello I'm new at the forum and I want to introduce myself: I'm Lucas Crijns and I'm a very happy user of ubuntu server.

I was reading about passwordless authentication with ssh. So I made a key and published it to ubuntu server, it worked well and I could login with my private key. But then I locked the account to prevent hacking from my password. After I ran "passwd -l lucas", I was not longer able by my next login to use sudo. Because it was asking for a password and I locked it. I was thinking that sudo would also be without a password. My question is now: is it possible to use sudo? And how can I enable it without a valid password for sudo?

Thank you for your help!

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