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In Ubuntu Linux (and a number of other systems) it is customary to use sudo to obtain root privileges, and often there is the task of writing (for example, via echo) any value to a …

From Ubuntu 17, the swap partition was replaced by a swap file. The main advantage of the swap file is easy resizing. In the following example, we will change the swap size from 2 GB …

RAM is very important for the computer normal operation. It contains all data of the working programs. When the memory is full, the program may produce various errors or even stop working. The response time …

We know that Linux is the most secure and reliable open source operating system. When choosing Linux for a computer, we can try any distributions we like, such as Ubuntu, OpenSUSE, Fedora, and so on. …

MOUNT(8) System Administration MOUNT(8) NAME mount - mount a filesystem SYNOPSIS mount mount -a mount device|dir mount device dir DESCRIPTION All files accessible in a Unix …

The DNS (Domain Name System) is used to determine which IP belongs to the required domain on the Internet. When a program needs to access the site by its domain name, the operating system sends …

To access the MySQL or MariaDB database, you need to enter a username and password. During installation, a root user account is automatically created, which is an analog of superuser in Linux for MySQL. It …

User groups are used to configure file system access of the operating system. Since in Linux all objects of the OS are files, then with the help of groups you can configure or restrict access …

The Linux operating system was originally created as a multi-user system. To control access rights for each user, three flags are used: read, write and execute. But this was not enough, so Linux user groups …

We have already spoken about Linux user groups on this site many times. This is the main and very convenient way to manage the permissions of users and processes in this operating system. To view …