Photon OS manages packages with an open source, yum-compatible package manager called tdnf, for Tiny Dandified Yum. Tdnf keeps the operating system as small as possible while preserving yum's robust package-management capabilities.
On Photon OS, tdnf is the default package manager for installing new packages. It is a C implementation of the DNF package manager without Python dependencies. DNF is the next upcoming major version of yum.
Tdnf appears in the minimal and full versions of Photon OS. Tdnf reads yum repositories and works like yum. The full version of Photon OS also includes yum, and you can install packages by using yum if you want.
In the minimal version of Photon OS, you can manage packages by using yum, but you must install it first by running the following tdnf command as root:
tdnf install yum
Photon OS comes with a preconfigured repository called photon-iso that resides in \etc\yum.repos.d. If you receive an access error message when working with the photon-iso repository, it is probably because you do not have the Photon OS ISO mounted. Mount the ISO and the run the following command to update the metadata for all known repositories, including photon-iso:
mount /dev/cdrom /media/cdrom
tdnf makecache
Refreshing metadata for: 'VMware Lightwave 1.0(x86_64)'
Refreshing metadata for: 'VMware Photon Linux 1.0(x86_64)Updates'
Refreshing metadata for: 'VMware Photon Extras 1.0(x86_64)'
Refreshing metadata for: 'VMware Photon Linux 1.0(x86_64)'
Metadata cache created.
Here's how to install a package:
tdnf install pkgname
Remove a package:
tdnf erase pkgname
List enabled repositories:
tdnf repolist
Tdnf implements a subset of the dnf commands as listed in the dnf guide.
For a description of the tdnf commands and options, including examples, see the Photon OS Administration Guide.