How to Fix 'Hash Sum Mismatch' Error in Debian/Ubuntu Linux for NVIDIA Isaac ROS Package Installation

Robotics & Edge Computing Robotics - Isaac Isaac ROS
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Troubleshooting ‘Hash Sum Mismatch’ Error for NVIDIA Isaac ROS Packages on Ubuntu/Debian

If you’re encountering a ‘Hash Sum Mismatch’ error when installing NVIDIA Isaac ROS packages on Ubuntu or Debian, follow these steps to resolve the issue by clearing corrupted or outdated package lists and resynchronizing with the package repositories.

Step-by-Step Guide to Fix the ‘Hash Sum Mismatch’ Error:

  1. Login as Root User:
    Begin by logging in as the root user or using sudo for administrative privileges.
    Open a terminal and enter:

    sudo -i

  2. Navigate to the APT Lists Directory:
    This directory contains package list files for APT (Advanced Package Tool). To move into the correct directory, type:

    cd /var/lib/apt/lists/

  3. Remove All Files in the Directory:
    Next, you will delete all files in the /var/lib/apt/lists/ directory. This step is essential for removing potentially corrupted or outdated package lists that might be causing the hash sum mismatch error:

    rm -rfv *

  4. Clean the Local Package Cache:
    Once the lists have been removed, clean the local repository cache to ensure no old or cached files are used during the package installation:

    apt clean

  5. Update the Package Lists:
    After cleaning the cache, update the package lists from all configured repositories. This command will fetch fresh information about the available packages:

    apt update

  6. Apply System Upgrades:
    After successfully updating the package lists, apply any pending package upgrades to bring your system up to date:

    apt upgrade

  7. Reboot the System (if Necessary):
    If the upgrade process included installing critical updates like a new kernel, reboot your system to apply the changes:

    reboot

Additional Tips:

  • Ensure you have a stable internet connection, as network issues can cause incomplete downloads or corrupted package files, leading to hash sum mismatches.
  • If the issue is specific to the NVIDIA Isaac ROS repository, you may want to check whether the repository is currently being synchronized or undergoing maintenance. Sometimes waiting and retrying later can resolve the issue.
  • If you continue to encounter the problem, try using a different repository mirror by modifying your /etc/apt/sources.list.

By following these steps, you should be able to resolve the Hash Sum Mismatch error and successfully install NVIDIA Isaac ROS packages on your Debian/Ubuntu system.

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Thanks for providing such a detailed post. It will be very helpful to the community!

Raffaello