我正在尝试在 Ubuntu 20.04 服务器上安装 Zabbix 监控软件。
我按照这里的说明进行操作： https://www.zabbix.com/download?zabbix=6.0&os_distribution=ubuntu&os_version=20.04_focal&db=mysql&ws=apache
当我尝试更新时，收到此错误：
user@someserver:~$ sudo apt-get update
[sudo] password for user:
Hit:1 http://archive.ubuntu.com/ubuntu focal InRelease
Get:2 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Get:4 http://archive.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 c-n-f Metadata [14.7 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal-security/main amd64 c-n-f Metadata [9,564 B]
Ign:7 https://repo.zabbix.com/zabbix/5.4/ubuntu focal InRelease
Err:8 https://repo.zabbix.com/zabbix/5.4/ubuntu focal Release
Could not handshake: Error in the pull function. [IP: 178.128.6.101 443]
Reading package lists... Done
E: The repository 'https://repo.zabbix.com/zabbix/5.4/ubuntu focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
这会导致整个安装中断，因为我可以直接从 Ubuntu Focal 存储库中提取一些（大多数？）所需的文件和可执行文件，但 Zabbix 需要的几个文件似乎只能从它们那里获得。
有人能给出一些建议吗？谢谢。