YUM, it's not just good eatin', it's also for updating your RedHat (or CentOS) packages.
Here's a [https://access.redhat.com/sitesites/documentationdefault/en-US/Red_Hat_Enterprise_Linux/6/htmlfiles/Deployment_Guideattachments/chrh_yum_cheatsheet_1214_jcs_print-yum1.htmlpdf cheatsheet]
What are the top 20 yummiest commands?
http://www.tecmint.com/20-linux-yum-yellowdog-updater-modified-commands-for-package-mangement/
Sometimes, you want to use a new repository. Like when installing [[Jenkins]] (although it's found in the regular repos, so maybe this isn't the best example for needing a separate repo)
from http://pkg.jenkins-ci.org/redhat/
<source lang="bash">
sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo
sudo rpm --import http://pkg.jenkins-ci.org/redhat/jenkins-ci.org.key
sudo yum install jenkins
</source>
;How do I find what repository provides a given package?:
: You use <code>repoquery</code>
For example, you have a package called <code>glibc-devel-2.12-1.107.el6_4.4.i686</code>
<source lang="bash">
repoquery -i glibc-devel-2.12-1.107.el6_4.4.i686
</source>
<pre>
Name : glibc-devel
Version : 2.12
Release : 1.107.el6_4.4
Architecture: i686
Size : 976153
Packager : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
Group : Development/Libraries
URL : http://sources.redhat.com/glibc/
Repository : rhel-6-workstation-rpms
Summary : Object files for development using standard C libraries.
Source : glibc-2.12-1.107.el6_4.4.src.rpm
Description :
The glibc-devel package contains the object files necessary
for developing programs which use the standard C libraries (which are
used by nearly all programs). If you are developing programs which
will use the standard C libraries, your system needs to have these
standard object files available in order to create the
executables.
Install glibc-devel if you are going to develop programs which will
use the standard C libraries.
</pre>
List the files of a package with <code>repoquery</code>
<source lang="bash">sudo repoquery -q -l mysql-connector-java</source>
If you don't have the repoquery command, install yum-utils first.
== EPEL ==
The Extra Packages for Enterprise Linux repository is usually something you want to add to all your RedHat/CentOS boxes. [[EPEL]]
[[Category:System Administration]]
[[Category:Packages]]