Linux | Red Hat Certification | IT Technology | Operations Engineer 👇Join our technical exchange QQ group with the note 【Official Account】 for quicker access 1. What is Linux 1. System Programming & Network Programming: Linux itself provides some APIs for programmers to call to complete more complex programming tasks (such as file operations, multithreading, … Read more
01 Content Summary Content validity TCP/IP Illustrated, Volume 1: Protocols mainly discusses the TCP/IP protocol, explaining the reasons for the definition of the TCP/IP protocol suite with numerous examples, as well as its application and operation in various operating systems. The second edition retains Stevens’ excellent knowledge system and writing style, while new author Kevin … Read more
1 Overview In our daily development and operations work, we encounter various software packages; software packages can be broadly divided into two categories: binary files, such as (exe, rpm, bin, etc.); the other category is source files (various tarballs). This article will introduce the most commonly used RPM software package in Linux systems, discussing the … Read more
1. Commands for Managing Files and Directories in Linux 1.1 pwd Command The English explanation of this command is print working directory. When you enter the pwd command, Linux will output the current directory. 1.2 cd Command The cd command is used to change the current directory. cd / to switch to the root directory … Read more
The Linux system is a multi-user, multi-tasking time-sharing operating system. Any user who wants to use system resources must first apply for an account from the system administrator and then log into the system with this account. A user’s account can help the system administrator track users who use the system and control their access … Read more
10 essential Linux concepts that every beginner must master. It is said that understanding more than 8 of them is considered passing.?Without further ado, let’s get started with the learning! 1 GNU and GPL The GNU Project (also known as the GNU Project) was publicly launched by Richard Stallman on September 27, 1983, as a … Read more
Click the blue text above to follow us Managing User Accounts 1. Overview of User Accounts 2. Group Accounts 3. UID and GID UID: User Identifier GID: Group Identifier The UID and GID numbers for the root user account are fixed values of 0. The UID and GID numbers for system user accounts default to … Read more
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
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
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