Liangxu Linux

Sep 16, 2023 · Operations

Fix Ubuntu apt‑get Update Errors: Configure Local Repositories & Install Packages

After installing Ubuntu 20.10 in a VM, the author encountered missing command errors and apt‑get update failures, then documents step‑by‑step troubleshooting: checking the OS version, adjusting sources.list via USTC mirrors, backing up and editing the file, installing essential packages, and handling offline installations.