=====Package Management=====

==== Install and Update Software Packages with DNF====

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. <code>dnf history undo</code>
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

<code>Red Hat Enterprise Linux 9.0 Appstream 
Red Hat Enterprise Linux 9.0  BaseOS </code>


Adding repos is done with **config-manager**  here isa an example
<code> 
[root@servera ~]# dnf config-manager \
--add-repo "http://content.example.com/rhel9.0/x86_64/rhcsa-practice/rht"</code>