Yum

External

• http://en.wikipedia.org/wiki/Yellowdog_Updater,_Modified
• http://prefetch.net/articles/yum.html

Internal

• Linux Commands

Overview

yum is an interactive, rpm-based package manager. It can automatically perform system updates, including dependency analysis and obsolete processing based on repository metadata. It can also perform installation of new packages, removal of old packages and perform queries on the installed and/or available packages among many other commands/services.

Recipes

Queries

Find Packages that Might Contain a Certain Command

yum provides sealert

Find Whether a Package is Installed

yum list installed | grep <package-name>

Example of positive hit:

[root@ns ~]# yum list installed | grep httpd
httpd.x86_64                     2.4.6-40.el7                @rhel-7-server-rpms
httpd-tools.x86_64               2.4.6-40.el7                @rhel-7-server-rpms

List of Everything Installed

yum info

Update All Packages

yum -y update

Uninstall a Package

yum remove <package-name>