Howtos / Articles

Display process name and ID of network connections

The netstat command on Linux shows you any active and listening network connections on the computer. If there is a connection active that you are not sure what it is, you can use the ‘-p’ (or ‘–programs’) parameter to show the process id (PID) and process name of the network connection/socket. Example: Note: to use the -p parameter, you need to have root privileges, otherwise the ‘PID/Program name’ field will just display ‘-’.…

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Configure a PPTP VPN Server on Ubuntu Linux

If you need to access your network (be it a home network, or a work network) from a remote location, a great option is to set up some sort of VPN connection. There are a few different types of VPN connections, such as PPTP, L2TP, and IPSec, and each has advantages and disadvantages. One of the advantages of PPTP VPN connections is that almost all devices that can create VPN connections, have a PPTP VPN client already. Linux can be…

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Installing Firebird From Source On Linux

This ‘How To’ article outlines the steps required to compile and install the Firebird database server on a Linux machine. Download the latest version of the source code from http://www.firebirdsql.org/en/server-packages/ At the time of writing this article, the latest version was 2.5.1.26351-0. Replace the URL below with the latest version, or get the source code package onto the Linux machine with some other method. $ wget “http://internode.dl.sourceforge.net/project/firebird/firebird/2.5.1-Release/Firebird-2.5.1.26351-0.tar.bz2″ Extract the downloaded package. $ tar xjvf Firebird-2.5.1.26351-0.tar.bz2 The file list will flow…

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Load Balancing With HAProxy

HAProxy is a free, reliable, high performance load balancing solution capable of proxying TCP and HTTP applications. This article will outline how to set up a simple HAProxy server to allow you to load balance web site requests to one or more back-end web servers. While this example may not be suitable for a production set up on the internet, its a good start if you just want to set up a simple load balanced web site. The following example…

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Top 5 Network Monitoring Tools for Linux

Below is a list of my top 5 network monitoring tools for Linux, in no particular order. Nagios Nagios is a network monitoring application that is capable of alerting a system administrator in the event that something goes wrong on a network, and even when it comes good again. Nagios lets you monitor network services (such as FTP, HTTP, SMTP, POP3, etc), host availability, host resources (CPU load, memory usage, etc), bandwidth utilization, and via the customizable nature of Nagios,…

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