問題描述
今天在WSL2 (Ubuntu)上運行apt update命令，結果出現以下錯誤：
$ apt update
Err:1 http://archive.ubuntu.com/ubuntu bionic InRelease
Could not connect to archive.ubuntu.com:80 (91.189.91.23). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.149). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.152). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.161). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.162). - connect (111: Connection refused)
Err:2 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Unable to connect to archive.ubuntu.com:http:
Err:3 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Unable to connect to archive.ubuntu.com:http:
Err:4 http://security.ubuntu.com/ubuntu bionic-security InRelease
Could not connect to security.ubuntu.com:80 (91.189.88.162). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.23). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.26). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.88.149). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.88.152). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.88.161). - connect (111: Connection refused)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic/InRelease Could not connect to archive.ubuntu.com:80 (91.189.91.23). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.149). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.152). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.161). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.162). - connect (111: Connection refused)
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease Unable to connect to archive.ubuntu.com:http:
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic-backports/InRelease Unable to connect to archive.ubuntu.com:http:
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/bionic-security/InRelease Could not connect to security.ubuntu.com:80 (91.189.88.162). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.23). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.26). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.88.149). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.88.152). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.88.161). - connect (111: Connection refused)
W: Some index files failed to download. They have been ignored, or old ones used instead.
嘗試重新修改了/etc/apt/source.list，但沒效果。
解決方案
# WSL2 Ubuntu
# Delete auto-generated files
$ rm /etc/resolv.conf
# Enable changing /etc/resolv.conf
# Enable extended attributes on Windows drives
$ cat /etc/wsl.conf
# Enable extra metadata options by default
[automount]
# enabled = true
# root = /mnt/
# options = "metadata,umask=22,fmask=11"
# mountFsTab = false
root = /
options = "metadata"
[network]
generateResolvConf = false
$ vi /etc/resolv.conf
# Add the lines
nameserver 8.8.8.8
nameserver 8.8.4.4
# Exit WSL2
$ exit
在Win10中以管理員身份打開CMD或Powershell，輸入以下命令
> wsl --shutdown
> netsh winsock reset
> netsh int ip reset all
> netsh winhttp reset proxy
> ipconfig /flushdns
最后在Windows Search > Network Reset中重置下網絡即可。
本機測試有效。
參考GitHub Issue
https://github.com/microsoft/WSL/issues/5382 @rescenic