Linux

Like many Linux commands, the typical syntax for chmod follows the pattern: first the command, then the options, and finally the file or directory to which it should be applied: chmod [options] permissions /path/to/file Before diving in, let’s review the types of Linux permissions and how they

Whether you are a beginner or an experienced user, these essential Linux commands will help you navigate, manage, and troubleshoot your system efficiently. 1️⃣ Navigation in the Filesystem * pwd – Show the current working directory. * ls – List files and folders. * ls -l – Detailed listing. * ls -a – Show hidden files. * cd – Change

Linux systems power countless servers and workstations worldwide, but how secure is yours? A single misconfiguration can leave your system vulnerable to attacks. That’s where Lynis, a powerful open-source auditing tool, comes in—think of it as a health checkup for your Linux setup. In this guide, we’ll

1. Installing OpenSSH Open the terminal and run the following command to install the OpenSSH server: Ubuntu/Debian: sudo apt update && sudo apt install openssh-server -y CentOS/RHEL: sudo yum install openssh-server -y Arch Linux: sudo pacman -S openssh 2. Configuring SSH Open the SSH configuration file: sudo vim /etc/

Этот гайд описывает установку и настройку Alpine Linux для использования в качестве сервера с Docker, настройкой файрвола (iptables), SSH, а также установкой необходимых утилит, DNS и timezone. Alpine Linux — это легковесная ОС, идеально подходящая для контейнеризации и виртуальных машин. Предварительные требования * Виртуальная машина (VM) с гипервизором (VMware, VirtualBox, KVM и

In today’s digital landscape, data breaches and cyber threats pose significant risks to businesses of all sizes. Sensitive information, such as customer records, financial data, and intellectual property, must be safeguarded against unauthorized access. For companies relying on Linux-based systems, implementing robust encryption methods is a critical step in ensuring

The gzip utility is not only one of the most popular file compression tools in Linux, but also a powerful program with many advanced features. Compression Optimization: Controlling the Compression Level gzip allows you to specify the compression level from 1 to 9: * 1 or --fast – maximum speed with minimal

Basics of iptables * ACCEPT – allow the packet to pass. * DROP – block the packet. * RETURN – skip the current chain and proceed to the next rule in the calling chain. * INPUT – used to control incoming packets. You can allow or block connections by port, protocol, or source IP address. * FORWARD – used to

Description chmod (change mode) — a command for modifying file and directory permissions in Linux. chown (change owner) — a command for changing the owner and group of a file or directory. Syntax chmod chmod [options] mode file * mode — permissions (numeric or symbolic format). * file — target file or directory. chown chown [options]

Example with Netplan (Ubuntu): 1. Identify the Current Network Interface Run: ip a Note the name of your interface (e.g., eth0, ens33). 2. Edit the Network Configuration Open the configuration file in a text editor (e.g., nano): sudo vim /etc/netplan/01-netcfg.yaml 3. Configure the Static IP