Proxmox backup client install on Ubuntu 22.04


New Member
Nov 9, 2023

I have a proxmox backup server that I want to use to backup around 10 standelone Ubuntu 22.04 servers. They do not run on Proxmox VE or anything else, just Ubuntu 22.02. For what I could find I have to install proxmox backup client on those standelone servers, but I got stuck at some errors.

The steps I followed:
1. wget -O /etc/apt/trusted.gpg.d/proxmox-release-bookworm.gpg
2. nano /etc/apt/sources.list.d/pbs-client.list
3. I insert and saved deb bullseye main
4. apt update

And then I receive these errors, and I can't really find a solution for it.
E: The repository ' bullseye InRelease' is not signed.
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.

I would like to know if there is a solution for this.
Not sure, but the GPG key is named "bookworm" you are trying to use the "bullseye" repo and maybe the bullseye repo got signed with another key that isn't listed in the PBS documentation anymore?

At least here it isn't complaining about the key when using the bookworm repo...but then complaining about missing dependencies when installing it:

Used the Waybackmachine to view the PBS2 documentation and there the key was indeed different:
If you install Proxmox Backup Server on top of Debian, download and install the key with the following commands:

# wget -O /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg

Verify the SHA512 checksum afterwards with the expected output below:

# sha512sum /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg
7fb03ec8a1675723d2853b84aa4fdb49a46a3bb72b9951361488bfd19b29aab0a789a4f8c7406e71a69aabbc727c936d3549731c4659ffa1a08f44db8fdcebfa /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg

and the md5sum, with the expected output below:

# md5sum /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg
bcc35c7173e0845c0d6ad6470b70f50e /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg
"Does not work" doesn't really help us understand what you did and what error(s) you got :)

PBS client only supports Debian. For other distros, even Debian based, dependencies must be solved manually. For Ubuntu 22.04 I will try this [1] suggestion from a forum user asap, looks like it should work. I suggest that you read the whole thread to get the full picture regarding the status of PBS client on other distros than Debian.



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