昨日まではapt update ができてたけど、突然できなくなったりしました。
/etc/apt/sources.list
を変更してリポジトリサーバの向き先を変える。
sudo vim /etc/apt/sources.list
VimのコマンドCLIで以下を実行
:%s;http://az01.clouds.archive.ubuntu.com/ubuntu/; http://ftp.riken.go.jp/Linux/ubuntu/;g
↑公式から理化学研究所に変更
<日本国内のダウンロードサイト>
http://www.ubuntulinux.jp/ubuntu/mirrors
変更前 /etc/apt/sources.list
deb http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial main restricted
deb-src http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial main restricted
deb http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb-src http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial universe
deb http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-updates universe
deb-src http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-updates universe
deb http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial multiverse
deb-src http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb-src http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://az01.clouds.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu xenial-security main restricted
deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://security.ubuntu.com/ubuntu xenial-security universe
deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://security.ubuntu.com/ubuntu xenial-security multiverse
deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse
変更後 /etc/apt/sources.list
deb http://ftp.riken.go.jp/Linux/ubuntu/ xenial main restricted
deb-src http://ftp.riken.go.jp/Linux/ubuntu/ xenial main restricted
deb http://ftp.riken.go.jp/Linux/ubuntu/ xenial-updates main restricted
deb-src http://ftp.riken.go.jp/Linux/ubuntu/ xenial-updates main restricted
deb http://ftp.riken.go.jp/Linux/ubuntu/ xenial universe
deb-src http://ftp.riken.go.jp/Linux/ubuntu/ xenial universe
deb http://ftp.riken.go.jp/Linux/ubuntu/ xenial-updates universe
deb-src http://ftp.riken.go.jp/Linux/ubuntu/ xenial-updates universe
deb http://ftp.riken.go.jp/Linux/ubuntu/ xenial multiverse
deb-src http://ftp.riken.go.jp/Linux/ubuntu/ xenial multiverse
deb http://ftp.riken.go.jp/Linux/ubuntu/ xenial-updates multiverse
deb-src http://ftp.riken.go.jp/Linux/ubuntu/ xenial-updates multiverse
deb http://ftp.riken.go.jp/Linux/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://ftp.riken.go.jp/Linux/ubuntu/ xenial-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu xenial-security main restricted
deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://security.ubuntu.com/ubuntu xenial-security universe
deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://security.ubuntu.com/ubuntu xenial-security multiverse
deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse