Tools

Telnet: a client-server protocol for cross-platform remote connections

Remote access to remote computer systems has always been a part of well-organized networks. Administrators can manage individual users as well as work on the move since a remote connection enables access to company data. One of the first protocols developed specifically for this purpose was Telnet. [...]  

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 users become familiar with process management, but at the same time also be suitable for professionals. [...]  

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. [...]  

Microsoft Access alternatives: are there any free applications that achieve the same result?

MS Access is widely used office software and enables people with no prior programming knowledge to work with databases. The license for the program, however, is not exactly cheap. Several free alternatives to Microsoft Access promise to do essentially the same thing. But which are the best Microsoft Access alternatives? And can they actually keep up with the range of functions and standard of operation that MS access offers? [...]  

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 analyzing these extensive text files is nigh on impossible, you can use log file analysis programs such as GoAccess, which process corresponding information and present it in clear reports. [...]  

Linux editor with a vast range of functions – Vim

In order to edit text files or receive source codes from software or websites, you require a text editor. Whether you’re using Linux, Windows, or Mac: the majority of operating systems these days already have them installed by default. There are also editors like Vim, which have a wider range of functions and simplify working with the confusing lines of code. [...]  

Alternatives to TeamViewer

You don’t always have to use the market leader – this also applies to remote access. TeamViewer is still the most widely-used solution for remote management and online meetings, but there are numerous alternatives on the market which can be considered. We present some serious alternatives to TeamViewer. [...]  

Nagios plugins: the basic modules of the popular IT monitoring software

Although the software itself doesn’t contain any functions for monitoring hosts, services, or events, Nagios is one of the most in-demand IT monitoring solutions. This task is left up to Nagios’ plugins, which can be installed in addition to the core files. Check out our digital guide and find out more about these indispensable modules and how to use these for your own Nagios installation. [...]  

Archive and compress data using Linux

Archiving and compressing data adds security and stability to systems. For Linux and other Unix-like systems, there are countless free programs that can be used to help create and unpack files via the command line that are unaltered or compressed. One of the classic packing programs for Linux is tar. Even today, the tool is considered to be one of the most important archiving tools, especially for compression tools like bzip2. [...]  

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? [...]