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Install FFmpeg on RHEL 5 or CentOS 5

Ryan — Wed, 18 Jan 2012 22:45:50 +0000

FFmpeg contains a number of tools to record, convert, stream and play multimedia content. The following tutorial will guide you through the installation of FFmpeg on either RHEL 5 or CentOS 5. I have chosen running on CentOS but it shouldn’t make a difference either way. Lets get started!

Adding the DAG repository

The first thing that you need to do is set up the DAG repository. This repository contains a large amount of very handy packages not available in the default repositories.

Add the following lines to: /etc/yum.repos.d/CentOS-Base.repo
[dag] name=DAG RPM Repository baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag gpgcheck=1 enabled=1

Now you need to add DAG’s GPG key. Without this you will get the following error message when attempting to use it with yum.

warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 6b8d79e6 Public key for faac.x86_64.1.26-1.el5.rf.rpm is not installed

Import the GPG key:
rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt

This next step is not necessary, but if you encounter any problems you may want to try updating your system.
$ sudo yum update

Install FFmpeg

$ sudo yum install ffmpeg

That should be it.

Change hostname on RedHat

Ryan — Fri, 10 Sep 2010 10:59:17 +0000

Changing the hostname on a RHEL box is fairly straightforward if you perform the following steps.

First change the HOSTNAME line in /etc/sysconfig/network

Then change the hostname in /etc/hosts

From here you can either reboot for the changes to take effect or do the following two steps.

Force the system to start using the hostname.
$ sudo /bin/hostname new_hostname

Get syslog to use the new hostname.
$ sudo /sbin/service syslog restart

RPM Cheat Sheet

Ryan — Thu, 23 Oct 2008 05:07:10 +0000

RPM stands for Red Hat Package Manager. There are a variety of distributions besides Red Hat that use RPM to manage packages including Fedora, Mandriva, SUSE, CentOS, and Yellow Dog Linux among others. RPM uses a database to keep track of what packages have been installed on the system and where they are located. This functionality allows you to easily query, install, upgrade, and remove packages from your system.

RPM packages are distributed in the following format “...rpm”

Check the package information.
$ rpm -qi mypackage.1.2.3.x86_64.rpm

List the files that will be installed.
$ rpm -ql mypackage.1.2.3.x86_64.rpm

Install an RPM package with the ‘-i‘ option.
$ rpm -i mypackage.1.2.3.x86_64.rpm

Upgrade a package that is already installed.
$ rpm -U mypackage.2.0.0.x86_64.rpm

Remove a package. You only need to provide the package name and not the version or rpm suffix.
$ rpm -e mypackage

View all the installed packages on your system.
$ rpm -qa

If you want to see more output you can increase the verbosity by adding the ‘-v‘ option to any of these commands. To raise it even further you can add ‘-vv‘.