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- Study the three policy types of SELinux
- SELinux is a security-enhanced Linux operating system security module. Its core is to improve system security through mandatory access control. In SELinux, policy types are an important part of defining security policies. According to different needs and scenarios, SELinux provides three different policy types, namely MLS (Multi-LevelSecurity), TE (TypeEnforcement), RBAC (Role- BasedAcc
- Linux Operation and Maintenance 1021 2024-02-26 17:03:06
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- Linux MBR: an important part of the system startup process
- When we start the computer, the startup process of the operating system is actually a complex and sophisticated process. Among them, MBR (MasterBootRecord, master boot record) is an important part of the system startup process. In the Linux system, MBR plays a linking role. It is responsible for booting and loading the operating system and passing control to the kernel. This article will delve into the role, structure and specific code examples of LinuxMBR. 1. The role of MBR. The MBR is located in the first sector of the hard disk (usually the
- Linux Operation and Maintenance 767 2024-02-26 16:54:06
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- Explore how SELinux works
- In today's Internet era, network security issues have become increasingly prominent. In order to protect the system from malicious attacks and unauthorized access, the operating system has higher requirements for security mechanisms. SELinux (Security-EnhancedLinux), as a security module of the Linux kernel, provides powerful security policies and access control mechanisms, providing additional security for the system. 1. The working mode of SELinux. SELinux adopts the mandatory access control (MAC) mechanism, which is different from the traditional
- Linux Operation and Maintenance 964 2024-02-26 16:45:15
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- Common Linux file finding tips
- Finding files in Linux is a need we often encounter in daily use. Whether we are looking for specific files or files containing specific content, we need to master some common methods. This article will introduce common methods of finding files in Linux, and attach specific code examples for reference. 1. Use the find command. The find command is the most commonly used tool for finding files in Linux systems. Its syntax is: find[path][options][expression][path
- Linux Operation and Maintenance 1222 2024-02-26 16:21:32
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- In-depth analysis of Linux PS command
- Title: In-depth understanding of the Linux PS command requires specific code examples. In the Linux operating system, the PS (ProcessStatus) command is a common command used to view the status of the current system process. Through the PS command, we can view the process information running in the system, including the PID of the process, occupied resources, running time, etc. This article will introduce the usage of PS command in depth and demonstrate its function through specific code examples. 1. Basic usage of PS command The basic usage of PS command is as follows
- Linux Operation and Maintenance 1399 2024-02-26 16:18:06
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- In-depth exploration of the three policy classifications of SELinux
- SELinux is a mandatory access control security technology used to enhance the security of Linux operating systems. In SELinux, policies are divided into three main categories: TargetedPolicy, Multiple Policies (MLS/MCSPolicy), and CustomPolicy. These three policy classifications play an important role in the security mechanism of SELinux. This article will introduce these three policies in detail with specific code examples.
- Linux Operation and Maintenance 1108 2024-02-26 16:03:18
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- Familiar with the three working modes of SELinux
- SELinux (Security-EnhancedLinux) is a security module that implements Mandatory Access Control (MAC) in Linux systems. It enforces security policies by applying labels to system objects (files, processes, etc.) for more fine-grained access control. SELinux has three working modes: Enforcing, Permissive and Disabled. This article will introduce these three modes in detail and provide specific code examples. 1
- Linux Operation and Maintenance 1130 2024-02-26 15:27:07
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- Analyze and study fields in Linux log files
- "Analysis and Research on the Number of Columns in Linux Log Files" In Linux systems, log files are a very important source of information, which can help system administrators monitor system operation, troubleshoot problems, and record key events. In a log file, each row usually contains multiple columns (fields), and different log files may have different column numbers and formats. It is necessary for system administrators to understand how to effectively parse and analyze the number of columns in log files. This article will explore how to achieve this using Linux commands and code examples.
- Linux Operation and Maintenance 840 2024-02-26 15:18:16
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- How to update user information in Linux system
- How to modify user information in Linux system In Linux system, each user has his or her own user account information, including user name, user ID, group ID, home directory, etc. If you need to modify user information, you can do so through the command line tool. The following will introduce the specific steps and sample code on how to modify user information under the Linux system. Step 1: View the current user information. First we need to confirm the user information to be modified. You can use the following command to view the details of the current user: $id. Step 2: Modify.
- Linux Operation and Maintenance 707 2024-02-26 15:09:30
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- Introducing the usage of PS command in Linux
- Title: In-depth understanding of the Linux PS command: Function introduction and code examples In the Linux operating system, the PS command is a very practical tool that can help users view process information running in the system and monitor the operation of the system. This article will introduce the basic functions and common options of the PS command, and demonstrate how to use the PS command to view and manage processes through specific code examples. 1. Introduction to the PS command The PS command is the abbreviation of ProcessStatus and is used to display information about the processes currently running in the system.
- Linux Operation and Maintenance 1311 2024-02-26 15:07:22
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- How to check the SSH version in Linux system
- How to check the SSH version in Linux systems SSH (SecureShell) is an encrypted remote connection protocol that is widely used in Linux systems. It is very important to understand the SSH version in the current system, because different versions may have different security vulnerabilities or functional features. In this article, we will introduce how to check the SSH version in a Linux system and provide specific code examples. First, we can check the SSH version in the system through the command line. The following are some commonly used
- Linux Operation and Maintenance 1219 2024-02-26 15:06:31
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- How to check the disk usage of Linux system?
- Title: How to check disk usage in Linux? In Linux systems, checking disk usage is one of the common operations for administrators and users. Understanding disk usage can help users free up disk space, manage files, and improve system performance in a timely manner. This article will introduce how to check disk usage in Linux systems and provide specific code examples. 1. Use the df command. The df command is a commonly used command used to display disk space usage. You can check the disk usage by entering the following command in the terminal
- Linux Operation and Maintenance 924 2024-02-26 15:01:16
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- Understand the different working modes of SELinux
- SELinux is a security-enhanced Linux. Its full name is Security-EnhancedLinux, which is a security module of the Linux kernel. It can provide mandatory access control function, through which the security of the system can be better protected. SELinux can effectively prevent malicious programs from abusing system resources by controlling the permissions of processes to access resources. In SELinux, there are three working modes: Enforcing, Permissiv
- Linux Operation and Maintenance 921 2024-02-26 15:00:27
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- Critical Linux MBR: Ensure the system starts properly
- LinuxMBR refers to the master boot record (MasterBootRecord) in the operating system, which is the key to ensuring the normal startup of the system. The MBR is usually located in the first sector of the hard disk (sector number 0), and it contains key information such as the boot loader and partition table. If the MBR is damaged or destroyed, the system will not start properly. Therefore, it is very important to understand how MBR works and learn to fix it. Under Linux systems, some tools and commands are usually used to repair MBR, as follows:
- Linux Operation and Maintenance 718 2024-02-26 14:46:05
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- Steps to check user list under Linux system
- Title: How to view the Linux system user list and specific operation steps The Linux operating system is an open source operating system that is widely used in servers, personal computers and other fields. In Linux systems, user account management is a very important part. Administrators need to check the user list and related information in the system from time to time. This article will introduce the specific steps to view the user list in a Linux system and provide relevant code examples. 1. The basic way to view the user list in the Linux system is as follows:
- Linux Operation and Maintenance 1356 2024-02-26 14:45:19
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