帮忙安装包吗？

Question

我问这个问题所以大部分细节都在那里。但总结一下：我已经将 PPA（也许从技术上讲它不是 PPA，但它的作用是这样的）添加到我的 sources.list.d 目录中并运行。sudo apt-get update 但出于某种原因，我仍然无法让我的系统找到该包。非常感谢任何帮助。

$ dpkg --print-architecture
amd64

$ dpkg --print-foreign-architectures
i386

$ sudo apt-get update
[sudo] password for ramy: 
Hit:1 http://us.archive.ubuntu.com/ubuntu focal InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]                                                            
Get:3 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]                                                                                                   
Get:4 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]                                                                                                
Hit:5 https://apt.releases.hashicorp.com focal InRelease                                                                                                                    
Hit:6 http://ppa.launchpad.net/forkotov02/ppa/ubuntu focal InRelease                      
Hit:7 https://apt.stellar.org focal InRelease                       
Get:8 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 DEP-11 Metadata [274 kB]
Get:9 http://security.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [24.4 kB]        
Get:10 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 DEP-11 Metadata [323 kB]                      
Get:11 http://security.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [58.3 kB]                 
Get:12 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 DEP-11 Metadata [2,464 B]                                       
Get:13 http://us.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 DEP-11 Metadata [2,468 B]
Get:14 http://us.archive.ubuntu.com/ubuntu focal-backports/universe amd64 DEP-11 Metadata [1,768 B]
Get:15 https://dl.cloudsmith.io/public/balena/etcher/deb/ubuntu focal InRelease [5,054 B]          
Fetched 1,020 kB in 1s (772 kB/s)                                     
Reading package lists... Done

要安装软件包，我遵循本指南。它指示我做两件事。第一 下载并安装公共签名密钥和

wget -qO - https://apt.stellar.org/SDF.asc | sudo apt-key add -

并[将存储库定义保存到 /etc/apt/sources.list.d/SDF.list]4使用回声“debhttps://apt.stellar.org$(lsb_release -cs) 稳定” | sudo tee -a /etc/apt/sources.list.d/SDF.list

echo "deb https://apt.stellar.org $(lsb_release -cs) stable" | sudo tee -a /etc/apt/sources.list.d/SDF.list

上面两个命令显示以下输出：

:~$ wget -qO - https://apt.stellar.org/SDF.asc | sudo apt-key add -
OK
:~$ echo "deb https://apt.stellar.org $(lsb_release -cs) stable" | sudo tee -a /etc/apt/sources.list.d/SDF.list
deb https://apt.stellar.org focal stable