dnf

• dnf was created to be intuitive

dnf list

• dnf list lists installed and available packages

dnf list 'selinux*'

• dnf search searches in name and summary. Use dnf search all to search in description as well
  • dnf search seinfo
  • dnf search all seinfo
• dnf provides searches in package file lists for the package that provides a specific file

• dnf provides */Containerfile

• `dnf info shows information about the package

Groups

• A dnf group is a collection of packages

• A regular group is just a collection of packages

• An environment group is used to install a specific usage pattern, and may consist of packages and groups

• Use dnf group list to see a list of groups

• Some groups are normally only installed through environme groups and not separately, and for that reason don’t show using dnf group list

• Use dnf group list hidden to see these groups as well

• to see packages within a group

dnf group info <groupName>

• Packages are marked as
  • mandatory
  • default
  • optional

dnf group install <groupName>

• While using dnf group install, only mandatory and default packages are installed
• To install optional packages also, use

dnf group install --with-optional

Subscription

• After attaching subscriptions to a system, entitlement certificates are created

  • /etc/pki/product indicates the installed Red Hat products

  • /etc/pki/consumer identifies the Red Hat account for registration

  • /etc/pki/entitlement indicates which subscription is attached

• Use the rct command to check current entitlements

rct cat-cert /etc/pki/entitlement/xyxxxyyzzz.pem

• if you haven’t register then this error will apeare

unregister

subscription-manager unregister

Access repositories offered through subscription manager

dnf config-manager --enable <name-of-repository>

Yum

• To access repositories that are offered through subscription manager, use

dnf config-manager --enable <name-of-the-repository>

to add repository access

• Third party repositories can be added using a repo file in /etc/yum.repos.d/, or using dnf config-manager

dnf config-manager --add-repo="file:///repo/AppStream"
cat >> /etc/yum.repos.d/AppStream.repo <<EOF
> [AppStream]
> name=AppStream
> baseurl=file:///repo/AppStream
> gpgcheck=0
EOF

Abstract