Introduction to netstat

What is netstat?

Various computer networks are connected with one another via the internet. In order to build up such connections, both the sending as well as the receiving systems have to provide transfer interfaces, or ports. Netstat allows you to find out which ports are opened by your own system and which active connections exist — all of this helps reduce the risk of undesired access attempts.

Image tools in comparison

Image tools: A comparison of the best programs

Double is better, especially when it comes to data backups. Backups shouldn’t only contain important files like documents, tables, presentations, or videos. Generate a comprehensive storage image of your entire system with the help of image-based backup tools and completely restore it including configurations in the event of total failure. Find what makes a good image tool and which functions you...

How Plesk file sharing works

Plesk file sharing: basics and tutorial

Plesk is undoubtedly one of the best solution for managing web and other server services. The server administration tool, which impresses with its intuitive interface, can also be used to save files on your own server and publish them to selected users. How exactly Plesk file sharing functions, and how you can set it up is explained in this guide.

Log file analysis with open source tool, GoAccess

How log file analysis works with GoAccess

The log files of web servers and cloud services reveal a lot about the users that access them. They contain information about which browser or operating system is being used, which search terms have been entered and how many different pages a user has accessed, for example. Since manually analysing these extensive text files is nigh on impossible, you can use log file analysis programs such as...

htop – the task manager for Linux, Mac OS X and BSD

Manage simple system processes with htop

Process managers can give experienced computer users and administrators an accurate overview of which programs and services are taking up the system’s capacity. Classic command-line tools are confusing, and can only be controlled with complicated commands. For Unix-like systems, such as Ubuntu, the task manager htop, with its text interface, is a first-class alternative. It can help inexperienced...

iptables tutorial –  rule sets for creating data packets

iptables tutorial: how to configure the filter tables of Linux kernels

Since the first version, Linux kernel has been implementing packet filter modules, with which filter tables can be created. However, additional programs such as iptables are required to configure the rule set. In our tutorial, we present the free software for the Linux kernel 2.4 and 2.6 and give you a little insight into how it all works.

Archiving and Compression Using Linux

Archive and compress data using Linux

Archiving and compressing files contributes positively to the security and stability of a system. For Linux and other unix-like systems, there are countless free programmes with which you can create unaltered or compressed archive files over the command line and extract them as well. One of the classic packing programmes for Linux is tar. Today, the tool still counts as one of the leading...

Nagios – an overview of all network processes

Nagios: the standard server for monitoring IT infrastructure

IT departments are not to be envied: all devices, servers, databases, etc., must not only be integrated into the network, but also work at any time. In order to prevent any problems that might arise in advance, Nagios is the monitoring tool you need in your standard IT repertoire. What makes the open source solution so special and what are the alternatives?


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