2.3 Yum Configuration

The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

2.3 Yum Configuration

2.3.1 Configuring Use of a Proxy Server
2.3.2 Yum Repository Configuration
2.3.3 Downloading the Oracle Linux Yum Server Repository Files
2.3.4 Using Yum Utilities to Manage Configuration

The main configuration file for yum is /etc/yum.conf. The global definitions for yum are located under the [main] section heading of the yum configuration file. The following table lists the important directives.

Directive	Description
`cachedir`	Directory used to store downloaded packages.
`debuglevel`	Logging level, from 0 (none) to 10 (all).
`exactarch`	If set to 1, only update packages for the correct architecture.
`exclude`	A space separated list of packages to exclude from installs or updates, for example: `exclude=VirtualBox-4.? kernel*`.
`gpgcheck`	If set to 1, verify the authenticity of the packages by checking the GPG signatures. You might need to set `gpgcheck` to 0 if a package is unsigned, but you should be wary that the package could have been maliciously altered.
`gpgkey`	Pathname of the GPG public key file.
`installonly_limit`	Maximum number of versions that can be installed of any one package.
`keepcache`	If set to 0, remove packages after installation.
`logfile`	Pathname of the yum log file.
`obsoletes`	If set to 1, replace obsolete packages during upgrades.
`plugins`	If set to 1, enable plugins that extend the functionality of yum.
`proxy`	URL of a proxy server including the port number. See Section 2.3.1, “Configuring Use of a Proxy Server”.
`proxy_password`	Password for authentication with a proxy server.
`proxy_username`	User name for authentication with a proxy server.
`reposdir`	Directories where yum should look for repository files with a `.repo` extension. The default directory is `/etc/yum.repos.d`.

See the yum.conf(5) manual page for more information.

The following listing shows an example [main] section from the yum configuration file.

[main]
cachedir=/var/cache/yum
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgkey=file://media/RPM-GPG-KEY
gpgcheck=1
pligins=1
installonly_limit=3

It is possible to define repositories below the [main] section in /etc/yum.conf or in separate repository configuration files. By default, yum expects any repository configuration files to be located in the /etc/yum.repos.d directory unless you use the reposdir directive to define alternate directories.