Debian Package Repositories

All Debian based systems use APT as a package management tool. The lists of repositories are defined in /etc/apt/sources.list and the .list files found in the /etc/apt/sources.d/ directory. Updates can be installed directly with the apt command line tool, or via the GUI.

APT sources.list files list one package repository per line, with the most preferred source listed first. Empty lines are ignored and a # character anywhere on a line marks the remainder of that line as a comment. The information available from the configured sources is acquired by apt update.

File: /etc/apt/sources.list
deb http://ftp.debian.org/debian buster main contrib
deb http://ftp.debian.org/debian buster-updates main contrib

# security updates
deb http://security.debian.org/debian-security buster/updates main contrib

In addition, you need a package repository from Proxmox to get Proxmox Backup updates.

During the Proxmox Backup beta phase, only one repository (pbstest) will be available. Once released, an Enterprise repository for production use and a no-subscription repository will be provided.

SecureApt

The Release files in the repositories are signed with GnuPG. APT is using these signatures to verify that all packages are from a trusted source.

If you install Proxmox Backup Server from an official ISO image, the verification key is already installed.

If you install Proxmox Backup Server on top of Debian, download and install the key with the following commands:

# wget http://download.proxmox.com/debian/proxmox-ve-release-6.x.gpg -O /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg

Verify the SHA512 checksum afterwards with:

# sha512sum /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg

The output should be:

acca6f416917e8e11490a08a1e2842d500b3a5d9f322c6319db0927b2901c3eae23cfb5cd5df6facf2b57399d3cfa52ad7769ebdd75d9b204549ca147da52626 /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg

and the md5sum:

# md5sum /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg

Here, the output should be:

f3f6c5a3a67baf38ad178e5ff1ee270c /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg

Proxmox Backup Beta Repository

During the public beta, there is a repository called pbstest. This one contains the latest packages and is heavily used by developers to test new features.

You can access this repository by adding the following line to /etc/apt/sources.list:

sources.list entry for pbstest
deb http://download.proxmox.com/debian/pbs buster pbstest

If you installed Proxmox Backup Server from the official beta ISO, you should have this repository already configured in /etc/apt/sources.list.d/pbstest-beta.list