[Ubuntu WSL] Ubuntu 18.04 LTS(WSL) 업데이트 시 Hash Sum mismatch 에러

1. Windows10 WSL Ubuntu 설치 후 업데이트 시 Hash Sum mismatch 에러 발생 Get:27 http://archive.ubuntu.com/ubuntu bionic-backports/universe amd64 Packages [4020 B] Get:28 http://archive.ubuntu.com/ubuntu bionic-backports/universe Translation-en [1856 B] Fetched 18.0 MB in 26s (685 kB/s) Reading package lists... Done E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic-updates/main/binary-amd64/by-..