8.1 Repositories

In large companies, the use of online software repositories is discouraged. This makes it a lot harder to install and update software. The solution for this problem is that a company will have and maintain its own repositories.

So knowing how to add repositories manually is a necessity. We can manually add repositories by adding a file to the folder /etc/yum.repos.d/. The file must end with .repo.

Below an example:

/etc/yum.repos.d/example.repo

The content of the file must have the following:

Parameter	Input	Use
[repository]	none	Repository ID
name=	repository_name	Where repository_name is a string describing the repository
baseurl=	repository_url	The location by IP or Name of the repo
gpgcheck=	0	A binairy wether to use a GPG Key Check
enabled=	1	A Binairy wether the repo is enabled or not

Where repository_url is an URL to the repository with the repository data:

• If the repository is available over HTTP, use: http://path/to/repo

• If the repository is available over FTP, use: ftp://path/to/repo

• If the repository is local to the machine, use: file:///path/to/local/repo

Heads up: don’t forget the extra / at the file repository. There are indeed 3 forward slash signs necessary.

Configuring a Repository

During the exam you might have to configure your own repositories. We have set up the following repository server for your use.

Repository provided at:

• http://192.168.60.8/repos8/BaseOS

• http://repo.greateracademy.local/repos8/BaseOS

We will need to create a new repo file at: /etc/yum.repos.d/

Let’s make the following file errata.repo:

vim /etc/yum.repos.d/

And add one of the following examples:

[Appstream]
name=appstream
baseurl=http://ftp.scientificlinux.org/linux/redhat/rhel/rhel-9-beta/appstream/x86_64/
enabled=1
gpgcheck=0

Now let’s attempt to update the kernel

[root@rhcsa ~]# dnf update kernel -y