Can't Login to my Server via SSH, and the password is correct

  • I'm using Linode, and I've asked around on the IRC channels, but no one seems to know. I've logged into my server via LISH (reference), and I used the correct password, and everything went fine. However, I need to login via SSH/FTP, and I can't. It keeps on giving me "permission denied". I know the password is correct because I reset it via LISH, and I know I've got the login method right because I've logged into my server before using the exact same commands. I sure hope this doesn't turn out to be some noob issue, or I'm going to be quite frustrated.

  • pestilence

    pestilence Correct answer

    9 years ago

    You need to run ssh (the client, and possibly the server) with more verbosity to understand why authentication is failing. For the client, run

    ssh -vvv [email protected] 
    

    On the server end, check the logs. /var/log/auth.log will give you a pretty good idea about what happens when you try to login, look for messages that contain sshd. There are a variety of reasons why authentication could be failing, ranging from simple (you aren't using the right username) to more complicated (sshd is configured to use the wrong authentication system).

    Thanks, I'll check that out as soon as I can get back to working on the server.

    I reset my password via the Web Console in Linode, and I was able to get back in. I appreciate the verbose tip. That's very useful.

    thank you, turns out my server also have ssh ip restriction i found out by looking to auth.log.

    Running ssh -d -d -d on the server side I see "Failed password for michael" ... "invalid password for user michael" But it's the right user and password!

    I had the same problem. Two clean installs failed to connect. I noted that a password that contained a `@` character always failed. When I used a `!` character instead it worked. This might be nonsense but maybe it will help someone

    ...or the log `/var/log/secure`, if is CentOS.

    `sudo service ssh status` on the server will also give you some valuable info

    In my case it was error complaining that it can not open tty file, after reopening terminal - connection were successful

  • Try using a different port. Seems that the SSH port the server was using was being used by another service, and I was getting some verrrrry wonky results.

  • In my case I edited /etc/shadow- with a text editor, as file manager was the only access I had. Even after I put the original hash string back somehow it didnt work. So after I reset a password with hosting panel all became working.

  • in my case our IT department had setup PAM stuff with rules that broke my login. followed @pestilence 's reply to see error, ended up commenting out AllowGroups in /etc/ssh/sshd_config, which was setup to some IT stuff:

    UsePAM yes
    #AllowGroups <some IT groups>
    
    

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Content dated before 6/26/2020 9:53 AM