1. Background The process of data flow between each layer should be changed, the number of field attributes, attribute names (generally unchanged, but there are also cases of changes during reconstruction), type names (common changes such as BO, VO, DTO). For the converted business objects, the original method is to directly fill in the instances […]
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[Comprehensive explanation of Linux commands] 116.umount command: a practical tool for unloading a loaded file system
Article directory umount Additional information grammar Options parameter Example Learn `python` from scratch umount Used to unmount a mounted file system Supplementary instructions The umount command is used to unmount a mounted file system. You can umount the file system using the device name or mount point, but it is best to unmount it through […]
[Comprehensive explanation of Linux commands] 123.SSH-Add and Useradd: Linux commands for managing users and keys
Article directory ssh-add Additional information grammar Options Example useradd Additional information grammar Options parameter exit value document Example Learn `python` from scratch ssh-add Add the private key to ssh-agent’s cache. Supplementary instructions The ssh-add command adds a private key to the ssh-agent’s cache. This command is located in /usr/bin/ssh-add. Grammar ssh-add [-cDdLlXx] [-t life] [file […]
[Comprehensive explanation of Linux commands] 120. Master the badblocks command and check hard disk bad sectors in time
Article directory badblocks Additional information grammar Options parameter Example other Learn `python` from scratch badblocks Find corrupted blocks on disk Supplementary instructions The badblock command is used to find damaged blocks on the disk. The hard disk is a wear-and-tear device, and physical failures such as bad sectors may occur after being used for a […]
[Comprehensive explanation of Linux commands] 121. Practical tips for using the dd command to copy and convert files
Article directory dd Additional information grammar Options Example Generate random string Learn `python` from scratch dd The dd command is used to copy files and convert and format the contents of the original files. Supplementary instructions The dd command is used to copy files and convert and format the contents of the original files. The […]
[Comprehensive explanation of Linux commands] 124.e2fsck: Tool for checking and repairing the second extended file system
Article directory e2fsck grammar Options parameter Example Learn `python` from scratch e2fsck e2fsck is used to check the integrity of the second extended file system and try to fix errors with the appropriate options. The returned value after execution and its representative meaning are as follows: 0 No errors occurred. 1 A file system error […]
[Comprehensive explanation of Linux commands] 128. How to create, set up and manage SWAP swap partitions
Article directory mkswap Create and set up SWAP swap partition Additional information grammar Options parameter Example Learn `python` from scratch mkswap Create and set up SWAP swap partition Supplementary instructions The mkswap command is used to create a swap partition on a file or device. After creation, use the sawpon command to start using this […]
Image red-eye removal in computer vision algorithms (Red-eye Removal)
Table of Contents 1 Introduction 2. The principle of red-eye phenomenon 3. Principle of image red-eye removal 4. Commonly used methods to remove red-eye from images 4.1 Methods based on color space 4.2 Methods based on shape analysis 4.3 Machine learning-based methods 5. Application and development 6. Summary 1. Introduction In photography, red-eye refers to […]
Wireshark uses command line to analyze packets
1, those situations require the use of the command line Wireshark provides too much information at once. Use command line tools to limit the information printed out so that only relevant data is displayed, such as IP addresses on a single line. The command line tool is suitable for filtering packet capture files and providing […]
el-autocomplete required verification questions
Description of requirements In the form, Permission number is the remote search component el-autocomplete, and the binding value of this component is of type String When submitting, business requirements need to pass the Permission number value of the entire object, including fetchId and fetchName Therefore, you need to listen to the selection event of el-autocomplete, […]