I know that the Proxmox team is working on a solution to have a client version that can be used on different Linux distributions (Bugzilla #4788). However, I needed to use proxmox-backup-client on older Ubuntu releases now. And because I use namespaces by default, I did prefer version 2. I haven't found any existing solution to install the client on older Ubuntu/Debian releases and started experimenting. I have now an AppImage file for the Backup Client v2.4.3 which works fine for me on both Ubuntu 16.04+18.04 and Buster. So, until an official solution is provided, you can give that a try if you like. The sources and AppImage files can be found here.
The AppImage for the Bookworm version 3.0.4 segfaults right now. So, any help to debug the issue and maybe fix or work around the issue is highly appreciated as well.
The AppImage for the Bookworm version 3.0.4 segfaults right now. So, any help to debug the issue and maybe fix or work around the issue is highly appreciated as well.