我正在尝试安装alien包：
mkj@mkj-ThinkPad-E470:~/Downloads$ sudo apt-get install alien
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package alien
mkj@mkj-ThinkPad-E470:~/Downloads$ sudo apt-get update
Err:1 http://in.archive.ubuntu.com/ubuntu bionic InRelease
Connection failed [IP: 91.189.88.162 80]
Err:2 http://security.ubuntu.com/ubuntu bionic-security InRelease
Connection failed [IP: 91.189.91.26 80]
Err:3 http://in.archive.ubuntu.com/ubuntu bionic-updates InRelease
Connection failed [IP: 91.189.88.161 80]
Err:4 http://in.archive.ubuntu.com/ubuntu bionic-backports InRelease
Connection failed [IP: 91.189.88.162 80]
Reading package lists... Done
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/bionic/InRelease Connection failed [IP: 91.189.88.162 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease Connection failed [IP: 91.189.88.161 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/bionic-backports/InRelease Connection failed [IP: 91.189.88.162 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/bionic-security/InRelease Connection failed [IP: 91.189.91.26 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.
我发现没有发生任何软件包安装。这是我的source.list：
#deb cdrom:[Ubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)]/ bionic main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://in.archive.ubuntu.com/ubuntu/ bionic main restricted
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://in.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ bionic universe
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic universe
deb http://in.archive.ubuntu.com/ubuntu/ bionic-updates universe
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://in.archive.ubuntu.com/ubuntu/ bionic multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic multiverse
deb http://in.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu bionic partner
# deb-src http://archive.canonical.com/ubuntu bionic partner
deb http://security.ubuntu.com/ubuntu bionic-security main restricted
# deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted
deb http://security.ubuntu.com/ubuntu bionic-security universe
# deb-src http://security.ubuntu.com/ubuntu bionic-security universe
deb http://security.ubuntu.com/ubuntu bionic-security multiverse
# deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
答案1
遇到同样问题时发现了这一点：
sudo rm -rf /var/lib/apt/lists/*
sudo apt-get update
答案2
我遇到了同样的问题，问题出在卡巴斯基。我关闭了卡巴斯基，WSL 运行起来没有问题sudo apt update。