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- The Importance and Function of Linux Hostnames
- Analysis of the Importance and Function of Linux Host Name In Linux systems, host name is a very important configuration item. It is not only used to identify the name of the current system, but also affects network communication and system management. In this article, we will analyze the function and importance of host names in detail, and provide some specific code examples to help readers better understand and manage host names. 1. The importance of the host name. The host name plays the role of connecting various devices and identifying the devices in a network environment. It allows users to easily distinguish between different devices.
- Linux Operation and Maintenance 1184 2024-03-14 10:18:04
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- Explore the disk storage mechanism in Linux ext2 file system
- In computer science, a file system is a mechanism used by an operating system to manage and organize files on a storage device. Among them, the ext2 file system is the earliest file system used in the Linux operating system. It uses a disk-based storage mechanism to manage file data and metadata. It is one of the more classic file systems in the Linux system. This article will deeply explore the disk storage mechanism in the Linuxext2 file system, including key concepts such as disk partitions, group descriptors, index nodes, data blocks, etc., and provide corresponding code
- Linux Operation and Maintenance 456 2024-03-14 10:09:04
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- Detailed explanation of the physical structure of the ext2 file system under Linux
- Detailed explanation of the physical structure of the ext2 file system under Linux. In the Linux system, ext2 is a commonly used file system type. It is a relatively simple and efficient file system. In this article, we will delve into the physical structure of the ext2 file system, including super blocks, group descriptors, inode tables, data blocks, etc., and also provide specific code examples to help readers better understand. 1. Super block (SuperBlock) The super block is one of the most important data structures in the ext2 file system.
- Linux Operation and Maintenance 1191 2024-03-14 10:03:04
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- How to use the source command in linux
- In Linux, the source command is usually used to re-execute the newly modified initialization file so that it takes effect immediately without having to log out and log in again. Its basic usage is: source filename, where filename must be an executable script file.
- Linux Operation and Maintenance 1374 2024-03-14 09:40:33
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- Check if the port is open in linux
- How to check whether the port is open in Linux: 1. Use the netstat command; 2. Use the ss command; 3. Use the lsof command; 4. Use the telnet command.
- Linux Operation and Maintenance 666 2024-03-13 16:17:37
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- linux view system information
- How to view system information in Linux: 1. View CPU information. Use the lscpu command to display detailed information about the CPU, including architecture, model, number of cores, number of threads, etc. The cat /proc/cpuinfo command can also view detailed information about the CPU, and Specific configuration of each core; 2. View memory information. Use the free -h command to view memory usage, including total memory, used memory, free memory, etc., and display it in a human-readable format, etc.
- Linux Operation and Maintenance 1304 2024-03-13 15:36:43
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- How to install linux system
- Steps to install the Linux system: 1. Insert the boot media; 2. Enter the BIOS settings; 3. Start the installation program; 4. Select the installation language; 5. Configure the keyboard layout; 6. Select the installation method; 7. Set the partition; 8. Settings Network and host name; 9. Create user and set password; 10. Start installation.
- Linux Operation and Maintenance 878 2024-03-13 15:24:03
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- How to check cpu usage in linux
- How to check CPU usage in Linux: 1. top command; 2. htop command; 3. vmstat command; 4. mpstat command; 5. GNOME System Monitor; 6. KDE System Guard; 7. nmon; 8. Write scripts for monitoring .
- Linux Operation and Maintenance 1082 2024-03-13 15:18:33
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- How to solve the problem of No such file or directory when executing a file in Linux
- Solution: 1. The file path is wrong, make sure the entered file path is correct; 2. The file does not exist, make sure the file to be executed actually exists in the specified path; 3. Permission issues, you can use the ls -l command to check The permissions of the file, and make sure you have execution permission; 4. If there are missing dependencies, you can use the ldd command to check the dependencies of the file and make sure all dependencies are installed; 5. The file format is wrong, make sure you are running the file that is suitable for the system architecture. .
- Linux Operation and Maintenance 1589 2024-03-07 15:21:54
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- Interpretation of differences between Oracle11g and Oracle12c versions
- Oracle Database has always been one of the leaders in enterprise-level database management systems, and its continuously updated and iterative versions have also attracted widespread attention. Among them, Oracle11g and Oracle12c versions are relatively representative versions and have many differences. This article will explain some important differences between Oracle11g and Oracle12c, and attach specific code examples to help readers gain a deeper understanding of the differences between the two versions. 1. Architecture differences Oracle1
- Linux Operation and Maintenance 825 2024-03-07 14:30:05
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- Detailed explanation of the management method of read-only permissions on Oracle tables
- Detailed explanation of the management method of read-only permissions on Oracle tables In Oracle database, it is very important to manage read-only permissions on tables, which can effectively protect the integrity and security of the data. This article will introduce in detail how to manage read-only permissions on tables in Oracle database and provide specific code examples. 1. Grant read-only permission to the user. Use the GRANT statement to grant read-only permission to the user: GRANTSELECTONtable_nameTOuser_name; Example:
- Linux Operation and Maintenance 682 2024-03-07 12:12:04
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- Detailed explanation of Oracle query table lock status method
- Detailed explanation of Oracle query table lock status method In database operations, table lock is a very important concept, it will affect the performance and concurrency of the database. This article will introduce in detail the method of querying table lock status in Oracle database and give specific code examples. 1. Method of querying table lock status In Oracle database, we can obtain table lock status information by querying in the system view. The following are some commonly used system views: V$LOCK: View DBA_BL that displays advanced lock information in the database
- Linux Operation and Maintenance 742 2024-03-07 11:36:03
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- Detailed explanation of new features of Oracle11g and Oracle12c
- As the world's leading database management system, Oracle is constantly updated and upgraded to adapt to changing needs. In this article, I will introduce the new features of Oracle11g and Oracle12c in detail, and provide specific code examples to help readers better understand. Detailed explanation of the new features of Oracle11g Automatic tuning function Oracle11g introduces an automatic tuning function, which can improve system performance by analyzing database performance and automatically performing necessary adjustments. Below is a simple code example,
- Linux Operation and Maintenance 948 2024-03-07 10:48:04
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- Oracle time format adjustment tutorial
- Oracle time format adjustment tutorial In Oracle database, time format adjustment is a very common operation, especially in the process of data query, display and processing. This article will introduce how to adjust the time format in the Oracle database and provide specific code examples, hoping to help readers better understand and apply the time format adjustment operation. 1. TO_DATE function The TO_DATE function in Oracle database is used to convert character date data into date data. Its basic syntax is:
- Linux Operation and Maintenance 590 2024-03-07 10:30:05
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- Comparison of database management functions between Oracle11g and Oracle12c
- Oracle is a world-famous relational database management system, and its different versions provide different functions and performance optimization. This article will compare the database management functions of Oracle11g and Oracle12c, and provide some specific code examples to illustrate their differences. 1. Comparison of storage management functions 1.1 Data file management In Oracle11g, we need to manually add and expand the size of data files, for example: ALTERDATABASEDATAFILE
- Linux Operation and Maintenance 1173 2024-03-07 10:12:05
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