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Ubuntu 18.04 reached its End of Standard Support in April 2023 (and Extended Security Maintenance ended April 2028). It is now considered legacy software. Unless you need it for legacy hardware or specific software compatibility, consider using a newer LTS (e.g., Ubuntu 22.04 or 24.04). Official Download Source The only safe place to download the original, unmodified ISO is from the Canonical (Ubuntu) official website . ubuntu 18.04 desktop download
