← All Kali Issues
apt

Hash sum mismatch

P Package High

🔴 Error Message

E: Failed to fetch, Hash Sum mismatch

📖 What This Means

Downloaded package index is corrupted or was modified in transit by a proxy.

🔧 Step-by-Step Fix

  1. Clean lists: sudo rm -rf /var/lib/apt/lists/*
  2. Clean cache: sudo apt clean
  3. Update: sudo apt update
  4. Try different mirror
  5. Disable proxy if using one
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