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FATAL: The following signatures were invalid Error in Ubuntu 14.04


FATAL: The following signatures were invalid Error in Ubuntu 14.04

If you’re an Ubuntu 14.04 user, you may have encountered the error «FATAL: The following signatures were invalid». This error can occur when trying to install software using apt-get or aptitude.

Causes of the Error

  • Incorrect or outdated package signatures
  • Problems with security keys in repositories
  • Failure to download packages

How to Fix the Error

There are several ways to fix the «FATAL: The following signatures were invalid» error in Ubuntu 14.04:

  1. Update the package list and security keys:

    2. sudo apt-get update

    Learn More

  2. Try installing the package again:

    3. sudo apt-get install package_name

  3. Clear the cache and update the security keys:

    4. sudo apt-get clean
    sudo apt-get update

  4. Add the security key manually:

    5. sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys key_number

After performing these steps, try installing the package again. If the error still occurs, try restarting your system and repeating the installation.

Conclusion

Fixing the «FATAL: The following signatures were invalid» error can be a simple process if you follow the steps outlined above. Remember to regularly update your system to avoid similar problems in the future.



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