# Configuration Files and Repositories The main configuration files reside in /etc/tdnf/tdnf.conf. The configuration file appears as follows: cat /etc/tdnf/tdnf.conf [main] gpgcheck=1 installonly_limit=3 clean_requirements_on_remove=true repodir=/etc/yum.repos.d cachedir=/var/cache/tdnf The cache files for data and metadata reside in /var/cache/tdnf. The following repositories appear in /etc/yum.repos.d/ with `.repo` file extensions: ls /etc/yum.repos.d/ lightwave.repo photon-extras.repo photon-iso.repo photon-updates.repo photon.repo You can list the the repositories by using the `tdnf repolist` command. Tdnf filters the results with `enabled`, `disabled`, and `all`. Running the command without specifying an argument returns the enabled repositories: tdnf repolist repo id repo name status photon-updates VMware Photon Linux 2.0(x86_64)Updates enabled photon-extras VMware Photon Extras 2.0(x86_64) enabled photon VMware Photon Linux 2.0(x86_64) enabled The `photon-iso.repo`, however, does not appear in the list of repositories because it is unavailable on the virtual machine from which these examples are taken. The `photon-iso.repo` is the default repository and it points to /media/cdrom. The `photon-iso.repo` appears as follows: cat /etc/yum.repos.d/photon-iso.repo [photon-iso] name=VMWare Photon Linux 2.0(x86_64) baseurl=file:///mnt/cdrom/RPMS gpgkey=file:///etc/pki/rpm-gpg/VMWARE-RPM-GPG-KEY gpgcheck=1 enabled=0 skip_if_unavailable=True The local cache is populated with data from the repository: ls -l /var/cache/tdnf/photon total 8 drwxr-xr-x 2 root root 4096 May 18 22:52 repodata d-wxr----t 3 root root 4096 May 3 22:51 rpms You can clear the cache to help troubleshoot a problem, but doing so might slow the performance of `tdnf` until the cache becomes repopulated with data. To clear the cache, use the following command: tdnf clean all Cleaning repos: photon photon-extras photon-updates lightwave Cleaning up everything The command purges the repository data from the cache: ls -l /var/cache/tdnf/photon total 4 d-wxr----t 3 root root 4096 May 3 22:51 rpms