Resolving Permissions Error for 'authorized_keys' File

This error typically occurs when the permissions on the authorized_keys file or its parent directories are not set correctly. To resolve this issue, you can use the following commands to set the appropriate permissions:

chmod 700 /home/<username>/.ssh 
chmod 600 /home/<username>/.ssh/authorized_keys

These commands set the correct permissions for the .ssh directory and the authorized_keys file. The chmod 700 command ensures that only the owner has read, write, and execute permissions for the .ssh directory, and the chmod 600 command ensures that only the owner has read and write permissions for the authorized_keys file.