When we try to log in to a server via SSH using a private key, the server may refuse the connection and show a "Bad permissions" error. This means the private key file has too open permissions — for example, it’s readable or writable by users other than the owner. SSH is strict about this for security reasons. It expects the private key file to be accessible only by the owner. So what’s the solution? Very simple! Just change the permissions using this command: chmod 600 your_private_key_file That’s it! Now, what magic does this command do? chmod 600 gives read and write permissions to the owner only and removes all permissions for the group and others. The first digit 6 comes from 4 (read) + 2 (write). The two zeros mean no permissions for group and others.
How to fix "Bad permissions" error in SSH
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