Ubuntu中文论坛

如题。
1.ppa：kx.studio的源
2.做过什么：换源，把其中的http://ppa.launchpad.net替换为http://launchpad.proxy.ustclug.org ，但是无效果，报错如下：
hua@ThinkPad-T440:~$ sudo apt update
忽略:1 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu focal InRelease
命中:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy InRelease
忽略:3 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu focal InRelease
命中:4 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates InRelease
忽略:5 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu focal InRelease
命中:6 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports InRelease
命中:7 https://packages.microsoft.com/repos/edge stable InRelease
命中:8 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-security InRelease
忽略:9 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu focal InRelease
忽略:10 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu bionic InRelease
忽略:11 http://launchpad.proxy.ustclug.org/kxst ... sic/ubuntu bionic InRelease
忽略:12 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu bionic InRelease
忽略:13 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu bionic InRelease
忽略:14 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu bionic InRelease
命中:15 https://esm.ubuntu.com/apps/ubuntu jammy-apps-security InRelease
忽略:1 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu focal InRelease
命中:16 https://esm.ubuntu.com/apps/ubuntu jammy-apps-updates InRelease
忽略:3 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu focal InRelease
忽略:5 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu focal InRelease
命中:17 https://esm.ubuntu.com/infra/ubuntu jammy-infra-security InRelease
忽略:9 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu focal InRelease
忽略:10 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu bionic InRelease
命中:18 https://esm.ubuntu.com/infra/ubuntu jammy-infra-updates InRelease
忽略:11 http://launchpad.proxy.ustclug.org/kxst ... sic/ubuntu bionic InRelease
忽略:12 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu bionic InRelease
忽略:13 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu bionic InRelease
忽略:14 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu bionic InRelease
忽略:1 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu focal InRelease
忽略:3 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu focal InRelease
忽略:5 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu focal InRelease
忽略:9 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu focal InRelease
忽略:10 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu bionic InRelease
忽略:11 http://launchpad.proxy.ustclug.org/kxst ... sic/ubuntu bionic InRelease
忽略:12 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu bionic InRelease
忽略:13 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu bionic InRelease
忽略:14 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu bionic InRelease
错误:1 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu focal InRelease
连接失败 [IP: 103.88.47.230 80]
错误:3 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu focal InRelease
连接失败 [IP: 103.88.47.230 80]
错误:5 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu focal InRelease
连接失败 [IP: 103.88.47.230 80]
错误:9 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu focal InRelease
连接失败 [IP: 103.88.47.230 80]
错误:10 http://launchpad.proxy.ustclug.org/kxst ... ibs/ubuntu bionic InRelease
连接失败 [IP: 103.88.47.230 80]
错误:11 http://launchpad.proxy.ustclug.org/kxst ... sic/ubuntu bionic InRelease
连接失败 [IP: 103.88.47.230 80]
错误:12 http://launchpad.proxy.ustclug.org/kxst ... ins/ubuntu bionic InRelease
连接失败 [IP: 103.88.47.230 80]
错误:13 http://launchpad.proxy.ustclug.org/kxst ... pps/ubuntu bionic InRelease
连接失败 [IP: 103.88.47.230 80]
错误:14 http://launchpad.proxy.ustclug.org/kxst ... dio/ubuntu bionic InRelease
连接失败 [IP: 103.88.47.230 80]
正在读取软件包列表... 完成
正在分析软件包的依赖关系树... 完成
正在读取状态信息... 完成
所有软件包均为最新。
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 无法下载 http://launchpad.proxy.ustclug.org/kxst ... /InRelease 连接失败 [IP: 103.88.47.230 80]
W: 部分索引文件下载失败。如果忽略它们，那将转而使用旧的索引文件。

请求帮助！非常感谢！

感觉是你的网络打不开 http://launchpad.proxy.ustclug.org

自己在外网买个一年几十块钱的廉价VPS建个代理就快了