JetPackによるapt-getエラーについて

Jetson TX2での開発を行っていたら、突然ホストPC側で「sudo apt-get update」

でのエラーが発生



Err:41 http://us.archive.ubuntu.com/ubuntu xenial/main arm64 Packages

404 Not Found [IP: 91.189.91.23 80]

Ign:52 http://us.archive.ubuntu.com/ubuntu xenial/universe arm64 Packages

Ign:58 http://us.archive.ubuntu.com/ubuntu xenial/multiverse arm64 Packages

Err:64 http://us.archive.ubuntu.com/ubuntu xenial-updates/main arm64 Packages

404 Not Found [IP: 91.189.91.23 80]

Ign:74 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe arm64 Packages

Ign:80 http://us.archive.ubuntu.com/ubuntu xenial-updates/multiverse arm64 Packages

Err:86 http://us.archive.ubuntu.com/ubuntu xenial-backports/main arm64 Packages

404 Not Found [IP: 91.189.91.23 80]

Ign:93 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe arm64 Packages

Fetched 553 kB in 3s (147 kB/s)

Reading package lists... Done

W: Invalid 'Date' entry in Release file /var/lib/apt/lists/_var_nv-deep-learning-repo-ga-cuda8.0-digits5.0_Release

E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.23 80]

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.23 80]

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.23 80]

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-backports/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.23 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

いろいろ試したけどだめだった。

行き着いた先が

NVIDIA DEVELOPER Ubuntu 14.04/16.04 and Jetpack 3.0

> sudo apt-get purge ".*:arm64"

...
> dpkg --remove-architecture arm64

以上のコマンドで無事「sudo apt-get update」ができるようになった。