Yesterday while re-purposing a server I was removing packages with apt-get and stumbled upon an interesting problem. After I removed the package and all of it's configurations, the subsequent installation did not re-deploy the configuration files.
After a bit of digging I found out that there are two methods for removing packages with apt-get. One of those method should be used if you want to remove binaries, and the other should be used if you want to remove both binaries and configuration files.
MySQL is the most popular open source relational database management system (RDBMS) in the world. MySQL is used by everyone from the simple small business website to the large internet giants like Facebook, Google or Amazon. In fact the contents of this page are even stored within MySQL.
Installing MySQL is a fairly common task for any systems administrator; especially if that administrator is running a standard LAMP stack (Linux, Apache, MySQL & PHP/Python/Perl).
While there are many distributed file systems out there; especially with the rise of cloud & virtual computing. The Network File System or NFS protocol has by far held its title as an easy to use, fast to implement and very efficient distributed file system. In today's article I will be covering how to set up a basic NFS share.
This article will assume that you have already created a file system, if not hop over to this article and then come back for the NFS steps.
For today's article I am going to explain how to create a basic firewall allow and deny filter list using the iptables package. We will be focused on creating a filtering rule-set for a basic everyday Linux web server running Web, FTP, SSH, MySQL, and DNS services.
Before we begin lets get an understanding of iptables and firewall filtering in general.
What is iptables? iptables is a package and kernel module for Linux that uses the netfilter hooks within the Linux kernel to provide filtering, network address translation, and packet mangling.
In one of the first posts of this blog I covered some basic SystemTap functionality from an email that I sent to members of my team, but I have always felt that I haven't given SystemTap as thorough of an article as this incredible tool deserves. Today I want to correct that.
For today's article I will show how to compile SystemTap scripts on one server while running the compiled module on a production server without installing debug-info or devel packages in production.