I'm getting the dreaded hash sum mismatch error when running sudo apt-get update:

Failed to fetch http://ftp2.nluug.nl/os/Linux/distr/kali/dists/kali-rolling/main/binary-amd64/Packages.gz Hash Sum mismatch

What I've tried

  • A lot of different mirrors
  • Make my phone a wifi hotspot and run apt-get update. This just used a different mirror
  • Removed everything in /var/lib/apt/lists and then run apt-get clean apt-get update again
  • Changed server in sources.list to https
  • run apt-key to refresh the key

In the end I downloaded the latest kali virtualbox image and still the same!


Downloaded the latest virtualbox VM image and the same again...

Also, maybe related is that it seems I'm unable to clone some git repos anymore:

git clone https://github.com/aircrack-ng/rtl8812au

Cloning into 'rtl8812au'... remote: Enumerating objects: 116, done. remote: Counting objects: 100% (116/116), done. remote: Compressing objects: 100% (76/76), done. error: inflate: data stream error (incorrect data check)B/s fatal: pack has bad object at offset 6162461: inflate returned -3 fatal: index-pack failed

Is there anything else to check for?


1 Answer 1


Kali needs only one line in the /etc/apt/sources.list file:

deb http://http.kali.org/kali kali-rolling main non-free contrib

Edit /etc/apt/sources.list if necessary with sudo nano /etc/apt/sources.list. Comment out all other lines in sources.list by preceding them with a # character and save the file.

Nano text editor keyboard shortcuts
Use the keyboard combination Ctrl + O and after that press Enter to save the file to its current location.
Use the keyboard combination Ctrl + X to exit nano.

Run the following commands to remove the hash sum mismatch error.

sudo rm -rf /var/lib/apt/lists/*  
sudo apt update -o Acquire::CompressionTypes::Order::=gz  
sudo apt clean  
sudo apt update  
  • On Ubuntu, this compression story doesn't repair the hash check problem
    – aaa
    Commented Jun 14, 2022 at 14:56
  • I talk about compression, not about how sources.list is composed
    – aaa
    Commented Jun 15, 2022 at 10:13
  • Sorry, I misunderstood. Maybe ask about it on Ask Ubuntu. You're also a user there.
    – karel
    Commented Jun 15, 2022 at 10:15

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