The less command allows you to rewind the text not only forward but also backward, search in both directions, go straight to the end or the beginning of the file. The peculiarity of less is that the command does not read the text completely, but loads it in small fragments.
In some cases you may need to see how much space files occupy in a certain folder and find the largest files to delete. There are several tools to solve these tasks, but the simplest of them is the du utility. It allows you to display the size of all files in a certain folder in bytes or in a more convenient format. Let's see what the du Linux command is and how to use it to solve your work tasks.
Each file and folder in the file system has a so-called Inode structure where the metadata of this object is stored. It stores the owner, owner group, time of modification, creation and access to the file, as well as other information. It can be seen not only with the help of file system debugging tools. Certain information is shown by the ls utility, but if you need more, you can use the stat command. Below we will tell you how to use this command in Linux.
Wireshark is a popular program that allows you to analyze network traffic. The program allows the user to view the contents of network packets at different levels of network operation. In addition to directly analyzing traffic, the program has the ability to decrypt encrypted wireless network packets. Unlike the console utility tcpdump, Wireshark has a very convenient graphical interface.
FFmpeg is a tool for converting files in most known video formats. The FFmpeg program has no graphical interface, but it allows you to perform tasks that other video converters are simply powerless to do. In this article, let's see how to install FFmpeg in Ubuntu 20.04 from the official repositories, as well as using the snap package. And then let's talk about how to use it to convert a small video from one format to another.
This is the name of a queue server that can handle messages using AMQP (Advanced Message Queuing Protocol). Several other protocols are also used with the help of plugins. Most often used as a broker of text messages, it receives messages from programs that generate them and delivers them to programs that are ready to receive them. The server itself is written in Erlang.
In Linux, users and groups are used to access the file system. Each file has an owner user and a group from which users can access it. This is a very simple yet flexible privilege system. Users are used not only for people working on the PC but also for running processes, allowing you to limit their sphere of influence. Next we will look at how to add new users to Debian.
Most modern Windows applications require the .NET Framework to work properly. Installing .NET Framework 4.5 is usually straightforward, but installing .NET Framework 3.5 often raises questions.
Many applications require .Net Framework 3.5 installed to run on Windows Server 2016, despite having .NET Framework 4.6 installed by default. For example, you cannot install and run SQL Management Studio without .Net 3.5. Next, let's see how to install Net Framework 3.5 on Windows Server 2016.