Comprehensive Analysis of Linux Firewall! Securing the Operating System (Part 2)

Linux | Red Hat Certification | IT Technology | Operations Engineer 👇 1000-person technical exchange QQ group Note [Public Account] for faster access 1. Firewall Service Management View current active services firewall-cmd –list-service[root@localhost ~]# firewall-cmd –set-default-zone=publicsuccess[root@localhost ~]# firewall-cmd –list-servicessh dhcpv6-client[root@localhost ~]# firewall-cmd –set-default-zone=homesuccess[root@localhost ~]# firewall-cmd –list-servicessh mdns samba-client dhcpv6-client# This allows for a more intuitive … Read more

Understanding Linux Permissions

In the process of using Linux, we often encounter issues related to users and groups. For example, the most common situation is when you want to execute a command in a certain path, and you frequently see this error message. permission denied Anyway, I often encounter this error while using FTP to transfer files. After … Read more

5 Linux Distributions Suitable for Programmers

What is Linux? Linux is an operating system based on Unix. It was developed by Linus Torvalds and first released its kernel in 1991. Because Linux is open-source software, its distributions are released by different organizations, resulting in different styles, desktop environments, and integrated tools and features. Now, let me introduce 5 Linux versions suitable … Read more

Linux Performance Parameter Indicators Reference

Click the “Blue WeChat Name” below the title to quickly follow This article from the technical community, “Linux Server Performance Parameter Indicators“, explains the reference for Linux server performance parameter indicators. When troubleshooting performance issues, you can make some preliminary judgments based on the data obtained from these commands, which is worth learning and understanding. … Read more

Over 1000 Common Linux Commands to Master

Warm Reminder: For better practical learning, it is recommended to refer to this on a PC. 0. Introduction No matter if you are engaged in development or operations, you need to understand the basic Linux commands. Linux commands are the core of the normal operation of the Linux system. If you are in operations, then … Read more

Linux System Common Commands Quick Reference Guide

System Information arch # Display the processor architecture of the machine (1) uname -m # Display the processor architecture of the machine (2) uname -r # Display the current kernel version dmidecode -q # Display hardware system components – (SMBIOS / DMI) hdparm -i /dev/hda # List the architectural features of a disk hdparm -tT … Read more

Understanding the Read Command in Linux

Click the above “Mechanical and Electronic Engineering Technology” to follow us In Linux, the read command is used to read data from standard input (usually the keyboard) and assign the input data to a variable. This command is very useful in scripts as it allows the script to pause execution and wait for user input. … Read more

Unlocking Linux Performance: Mastering Resource Limits with ulimit & Cgroup

Linux | Red Hat Certified | IT Technology | Operations Engineer 👇 1000-person technical exchange QQ group Note [Public Account] for faster approval In Linux, there are two ways to control resources: One is based on POSIX (dependent on the PAM module), which limits user session resources. The other is based on Cgroup, mainly used … Read more

Summary of the 150 Most Used Linux Commands

Click on 'Little White Learns Vision' above, choose to add "Starred" or "Top"<br/>Important content delivered to you first<br/> As a beginner learning Linux, what should you do if you can’t remember commands, can’t classify them, and can’t filter the key points? Don’t worry, experts have compiled and organized a list of the 150 most commonly … Read more

Exploring The Magical Power Of Process Address Space In Linux

Linux | Red Hat Certified | IT Technology | Operations Engineer 👇Technical exchange QQ group of 1000 people, note [public account] for faster approval Address Bus The width of the address bus is generally 32 or 64. Each bus can exhibit either electric or non-electric (weak signal), with an energized bus interpreted by the computer … Read more