How to enable auto updates in Ubuntu

It is important to keep your Linux server up to date with security updates, Linux Distributions like Ubuntu and Debian release updates daily, so it can become a tedious job to keep the system up to date. Thankfully there is an option to install security updates automatically, here are the steps to enable automatic security updates in Ubuntu 14.04 and later versions. Continue reading How to enable auto updates in Ubuntu

How to install FFmpeg on Ubuntu 14.04

FFmpeg has been removed from Ubuntu 14.04 and was replaced by Libav. This decision has been reversed so that FFmpeg is available now in Ubuntu 15.04 again, but there is still no official package for 14.04. In this tutorial, I will show you how to install FFmpeg from mc3man ppa. Add the mc3man ppa:

sudo add-apt-repository ppa:mc3man/trusty-media

And confirm the following message by pressing <enter>:

Also note that with apt-get a sudo apt-get dist-upgrade is needed for initial setup & with some package upgrades
More info: https://launchpad.net/~mc3man/+archive/ubuntu/trusty-media
Press [ENTER] to continue or ctrl-c to cancel adding it

Update the package list.

sudo apt-get update
sudo apt-get dist-upgrade

Now FFmpeg is available to be installed with apt:

sudo apt-get install ffmpeg

Disable IPv6 networking on CentOS

Follow these steps to disable IPv6 on CentOS. Edit the /etc/sysctl.conf file, I will use the nano editor here:

nano /etc/sysctl.conf

And add the following line at the end of the file:

net.ipv6.conf.all.disable_ipv6 = 1

Then run:

sysctl -p

to load the new settings.

The next step is to edit the network card configuration file (/etc/sysconfig/network-scripts/ifcfg-eth*) and add or edit the setting IPV6INIT so that it is set to "no".

IPV6INIT="no"

Now edit the file /etc/sysconfig/network:

nano /etc/sysconfig/network

And set the NETWORKING_IPV6 option to "no":

NETWORKING_IPV6=no

Then restart the server.

Enable image caching in apache for better Google Page Speed results

High page speed and short page load times of your website are essential for good search engine rankings today. In this FAQ, I will show you how to enable caching of graphic and CSS files in apache on Ubuntu and Debian.

The first step is to enable the expires module in apache:

a2enmod headers expires

This module allows the apache web server to set HTTP headers, in this case, to set the modification header for static assets like image and CSS files that don't change often.

Add the following config snippet inside the vhost file of the web site or at the end of the file /etc/apache2/apache2.conf to enable it globally.

<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$">
Header set Cache-Control "max-age=3024000, public"
</FilesMatch>

Finally reload apache to apply the configuration change.

service apache2 reload

On ISPConfig 3 servers, the snippet can be added in the "Apache Directives" field of the website instead. There is no apache reload required as ISPConfig takes care about that.

How to Backup OpenVZ Containers with vzdump on CentOS 6

OpenVZ is a Linux based Kernel virtualization technology developed by SWSoft for its commercial product Virtuozzo. The modified Linux Kernel and the system utilities are released under an OpenSource license. Vzdump is a shell based backup program for OpenVZ virtual machines. It is made for containers that use the traditional "simfs" filesystem, it can not be used for containers with "ploop" filesystem.

Continue reading How to Backup OpenVZ Containers with vzdump on CentOS 6