The Linux tool mpstat provides information about the utilization of the individual CPUs of a system. For multi-core CPUs, each core is displayed as a CPU. Hyperthreaded CPUs display two CPUs per physical CPU or physical core. For most Linux Read more…
On Linux, the time command can be used to measure the execution time for a command line program. This article shows this with the example of the updatedb program. call The timecommand is simply given before the program to Read more…
Varnish is a web accelerator (reverse proxy), which provides relief for the actual web server (the backend). It has been designed from the ground up just for this use, unlike traditional proxies (eg Squid). The project website Read more…
The year 2017 comes to an end and with it various projects, companies and products in the IT industry. Not only the Jamaican coalition failed and Germany’s formerly second largest airline filed for bankruptcy, many smaller Read more…
Not only Intel is affected by the serious vulnerability in processors, by which attackers can read sensitive data. Google’s Project Zero explains the functioning of the memory leaks and Linus Torvalds expects honesty. Intel wants to quickly take care Read more…
As easy as real servers today can be converted into virtual machines, as fast as the overview is lost. With special monitoring adapted for virtual environments, you keep track of things. Virtualization is a technology that Read more…
This article gives an overview of how the network configuration in Debian can be stored and modified in the configuration file / etc / network / interfaces . Automatic activation at startup In order for certain interfaces to be activated automatically during Read more…
A little thought experiment: You want to write a web server, so program a socket-based server. When a browser connects to it and requests a file, it delivers it, the client terminates the connection, and everyone Read more…
The Apache web server has several causes that cause an internal server error . One possible cause is erroneous entries in an htaccess file, for example due to incorrectly defined forwarding. In this article we describe how you can Read more…
Data backups under Linux are easily and efficiently created with rdiff-backup . The tool written in Python also creates statistics for each backup pass and stores them in their own files. The following article explains what the values of the statistics mean and what values you must be Read more…
