October 2021 - Page 2

How to find out which process is causing high disk usage in Linux

Posted by Alex On October 18, 2021

Monitoring input and output operations Excessive load on the disk can be caused by such a reason as a virus infection or incorrect program settings. In any case, you need to start by identifying the process (program) that most reads and writes to disk. iotop – analog of top for tracking disk load in real time The top program allows...

How to use lsof to view open files (on Linux everything is files)

Posted by Alex On October 18, 2021

If everything in Linux is a file, then there must be more to this operating system than just files on your hard drive. In this tutorial, you will learn how to use lsof to view all other devices and processes that are being treated as files. Everything in Linux is files The oft-quoted phrase that everything in Linux is a...

How to measure distance (route and direct) between two points on Google maps

Posted by Alex On October 18, 2021

Table of contents 1. What is the difference between the distances directly and the route between two objects on the map 2. How to measure a route between two points on the map 2.1 How to measure a route between two points on the map on a computer 2.2 How to change the route between two objects on the map in Android...

GIMP copies not all layers (SOLVED)

Posted by Alex On October 17, 2021

GIMP is a powerful image editor, comparable to PhotoShop in features, but completely free. You may have come across a situation where you have edited an image, perhaps added text and other layers and are trying to copy the resulting image, for example, to create a new file from it or paste into another image. However, only individual elements or...

htop command guide: how to view processes in Linux interactively

Posted by Alex On October 17, 2021

Is htop better or top? The htop command is similar to top in function: they both display real-time information about processes, display system resource consumption, and allow you to search, stop, and manage processes. Both commands have their own advantages. For example, the htop program implements a very convenient process search and filtering. In the top command, this is not...

How to use the top command to monitor Linux processes

Posted by Alex On October 17, 2021

“top” program for showing Linux processes in real time The top program shows the program and service processes running on Linux. With top, you can see the dynamics of a running system in real time. The program displays a summary of the system information, as well as a list of processes or threads currently served by the Linux kernel. You...

How to check IP history for SSH sessions

Posted by Alex On October 15, 2021

How to list IP history of SSH sessions If a Linux server has been hacked, it becomes necessary to collect information, for example, to get the time and IP addresses of the last SSH sessions. This can help not only identify the source of the danger, but also, for example, answer the question: was the SSH password brute-forced (or the...

How to list all Cron tasks

Posted by Alex On October 15, 2021

Show all Cron jobs for all users To display every item in the cron schedule for each user, use the following command: for user in $(cut -f1 -d: /etc/passwd); do sudo crontab -u $user -l 2>/dev/null | grep -v '^#'; done Elevated privileges are required to display information about all users – otherwise, only the current user's schedule will be...

File attributes on Linux

Posted by Alex On October 14, 2021

File attributes on Linux file systems Each file has a specific set of properties in the file system. For example, these are access permissions, owner, name, timestamps. In Linux, each file has quite a few properties, for example, access permissions are set three times (for the owner, group and all others), timestamps can also be of three different types (creation...

GUI program to view and delete metadata in Linux

Posted by Alex On October 14, 2021

What is metadata Metadata is additional information embedded in a file, for a photo, metadata is GPS coordinates, information about the camera, shooting settings, etc., for office documents, metadata is the author's name, the time the document was edited, the name of the organization, the editor program, etc. As it is said, metadata is information that describes other information. Many...