<strong>Find out what version you're running</strong><br>cat /etc/redhat-release<br><strong>find out if 64- or 32-bit</strong><br>uname -m<br><strong>install with yum</strong><br>yum install<br><strong>uninstall with yum</strong><br>yum remove<br><strong>remove or delete a file</strong><br>rm <filename><br><strong>installing RHEL EPEL repo</strong><br>https://www.rackspace.com/knowledge_center/article/installing-rhel-epel-repo-on-centos-5x-or-6x<br><strong>more yum stuff</strong><br>https://www.cyberciti.biz/faq/rhel-centos-fedora-linux-yum-command-howto/<br> <br><strong>weird "issues"</strong><br>(aka n00b mistakes)<br><pre><code>warning: epel-release-6-5.noarch.rpm: Header V3 RSA/SHA256 signature: NOKEY, key ID 0608b895<br>error: Failed dependencies:<br> rpmlib(FileDigests) <= 4.6.0-1 is needed by epel-release-6-5.noarch<br> rpmlib(PayloadIsXz) <= 5.2-1 is needed by epel-release-6-5.noarch</code></pre><br>Installing for wrong version! (see above to check your version)