If you’re encountering the “SSL/TLS certificate is not being validated” issue with the wget command, it means that wget is not able to verify the SSL/TLS certificate of the server. This could happen for various reasons, and here are some steps you can take to address the issue:

  1. Update wget: Ensure that you are using the latest version of wget as newer versions may have bug fixes and improvements.

    sudo apt-get update
sudo apt-get install wget

    On other systems, you may need to use the package manager specific to your platform.

  2. Check Certificate Expiry: Make sure that the SSL/TLS certificate on the server you are trying to connect to is still valid. Certificates have expiration dates, and if the certificate has expired, wget will not be able to validate it.

  3. Specify Certificate Authority (CA) File:

    wget --ca-certificate=/path/to/ca-cert-file https://example.com

    Replace /path/to/ca-cert-file with the path to your CA certificate file. This helps wget to validate the server’s certificate against the provided CA certificate.

  4. Use --no-check-certificate (Not Recommended): While this is not recommended for security reasons, you can use the --no-check-certificate option to bypass SSL certificate validation.

    wget --no-check-certificate https://example.com

    This option should only be used in a controlled environment or when you are sure of the security implications.

  5. Check System Date and Time: Ensure that the system date and time on your machine are accurate. If the date and time are incorrect, SSL/TLS certificate validation may fail.

  6. Firewall and Proxy Settings: If you are behind a firewall or using a proxy, make sure that it is configured correctly and not causing interference with the SSL/TLS connection.

Remember that using --no-check-certificate compromises security, and it’s essential to identify and address the underlying issue causing the certificate validation failure whenever possible.