POSTS / Fix `~/.ssh/authorized_keys` Not Working Issue

#48 says you need to run chmod 644 ~/.ssh/authorized_keys to allow the SSH server read the private keys successfully, but it doesn’t work. 😅

This post says that 644 is not the correct permissions for ~/.ssh/authorized_keys.

This is what he did after finding the ~/.ssh/authorized_keys not working.

1. Run journalctl --unit=sshd and see what happened during the last connection.
2. Find SSHD complaining Authentication refused: bad ownership or modes for directory ~/.ssh.
3. Run the following code to set correct permissions:

   cd ~/.ssh
   chmod 700 ../
   chmod 700 .
   chmod 600 ./authorized_keys

Then I found this from Ubuntu Community Help Wiki for detailed information: Permission Denied, which says:

If you’re sure you’ve correctly configured sshd_config, copied your ID, and have your private key in the .ssh directory, and still getting this error: Permission denied (publickey). Chances are, your /home/<user> or ~/.ssh/authorized_keys permissions are too open by OpenSSH standards. You can get rid of this problem by issuing the following commands:

chmod go-w ~/
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

And the correctness of the solution above gets validated.