# 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



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

## 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 Enterprise Repository¶

This will be the default, stable, and recommended repository. It is available for all Proxmox Backup subscription users. It contains the most stable packages, and is suitable for production use. The pbs-enterprise repository is enabled by default:

File: /etc/apt/sources.list.d/pbs-enterprise.list
deb https://enterprise.proxmox.com/debian/pbs buster pbs-enterprise


To never miss important security fixes, the superuser (root@pam user) is notified via email about new packages as soon as they are available. The change-log and details of each package can be viewed in the GUI (if available).

Please note that you need a valid subscription key to access this repository. More information regarding subscription levels and pricing can be found at https://www.proxmox.com/en/proxmox-backup-server/pricing

Note

You can disable this repository by commenting out the above line using a # (at the start of the line). This prevents error messages if you do not have a subscription key. Please configure the pbs-no-subscription repository in that case.

## Proxmox Backup No-Subscription Repository¶

As the name suggests, you do not need a subscription key to access this repository. It can be used for testing and non-production use. It is not recommended to use it on production servers, because these packages are not always heavily tested and validated.

We recommend to configure this repository in /etc/apt/sources.list.

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

# PBS pbs-no-subscription repository provided by proxmox.com,
# NOT recommended for production use


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