Linux APT Hash Sum Mismatch Error Fix

Overview

APT "Hash Sum mismatch" error occurs when downloaded package data does not match expected checksums.

Key Details

• Error: Hash Sum mismatch
• Tool: apt / apt-get
• Package index files are corrupted
• Cannot update or install packages

Common Causes

• Mirror is out of sync
• Network proxy caching stale data
• ISP transparent proxy interference
• Corrupted local package cache

Steps

1. 1Clear APT cache: sudo apt clean
2. 2Remove lists: sudo rm -rf /var/lib/apt/lists/*
3. 3Update again: sudo apt update
4. 4Try a different mirror in /etc/apt/sources.list
5. 5Disable proxy temporarily

Tags

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Frequently Asked Questions