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14.4.2.  [repository] Options

The [repository] section of the /etc/yum.conf file contains information about a repository yum can use to find packages during package installation, updating and dependency resolution. A repository entry takes the following form:
[repository ID]
name=repository name
baseurl=url, file or ftp://path to repository
You can also specify repository information in a separate .repo files (for example, rhel5.repo). The format of repository information placed in .repo files is identical with the [repository] of /etc/yum.conf.
.repo files are typically placed in /etc/yum.repos.d, unless you specify a different repository path in the [main] section of /etc/yum.conf with reposdir=. .repo files and the /etc/yum.conf file can contain multiple repository entries.
Each repository entry consists of the following mandatory parts:
[repository ID]
The repository ID is a unique, one-word string that serves as a repository identifier.
name=repository name
This is a human-readable string describing the repository.
baseurl=http, file or ftp://path
This is a URL to the directory where the repodatadirectory of a repository is located. If the repository is local to the machine, use baseurl=file://path to local repository . If the repository is located online using HTTP, use baseurl=http://link . If the repository is online and uses FTP, use baseurl=ftp://link .
If a specific online repository requires basic HTTP authentication, you can specify your username and password in the baseurl line by prepending it as username:password@link. For example, if a repository on http://www.example.com/repo/ requires a username of "user" and a password os "password", then the baseurl link can be specified as baseurl=http://user:password@www.example.com/repo/.
The following is a list of options most commonly used in repository entries. For a complete list of repository entries, refer to man yum.conf.
gpgcheck=<1 or 0>
This disables/enables GPG signature checking a specific repository. The default is gpgcheck=0, which disables GPG checking.
gpgkey=URL
This option allows you to point to a URL of the ASCII-armoured GPG key file for a repository. This option is normally used if yum needs a public key to verify a package and the required key was not imported into the RPM database.
If this option is set, yum will automatically import the key from the specified URL. You will be prompted before the key is installed unless you set assumeyes=1 (in the [main] section of /etc/yum.conf) or -y (in a yum transaction).
exclude=<package name/s>
This option is similar to the exclude option in the [main] section of /etc/yum.conf. However, it only applies to the repository in which it is specified.
includepkgs=<package name/s>
This option is the opposite of exclude. When this option is set on a repository, yum will only be able to see the specified packages in that repository. By default, all packages in a repository are visible to yum.