It stands for Dandified Yum
All installation and removal transactions are logged in the /var/log/dnf.rpm.log file
The dnf history command displays a summary of installation and removal transactions. Similar to yum history.
dnf history undo
Will reverse the transaction
Here are some dnf options and their features
| option | what it does |
|---|---|
| list | displays installed and available packages |
| Search | list packages by keywords in name and summary fields option is all |
| info | gives detailed info about a package |
| provides pathname | Displays packages that match the specified path name |
| install/remove | obtains and install a package and its dependencies (or removes |
| update | updates a package and any associated dependencies |
| group list | shows names of installed and available groups |
| group info | displays info about a group including list of mandatory, default and optional packages |
| group install | installs the manadatory and default packages and their dependencies of a group |
| history | shows summary installation and removal transactions |
| repolist | lists available repositories |
RH9 comes with 2 default repositories
Red Hat Enterprise Linux 9.0 Appstream Red Hat Enterprise Linux 9.0 BaseOS
Adding repos is done with config-manager here isa an example
[root@servera ~]# dnf config-manager \ --add-repo "http://content.example.com/rhel9.0/x86_64/rhcsa-practice/rht"