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- Application of efficient log library under Linux
- Due to the inherent characteristics of the log itself, records are inserted sequentially from left to right, which means that the records on the left are "older" than the records on the right. In other words, we do not need to rely on the system clock. This feature is very useful for distributed Very important to the system. It is unknown when the application log appears in the database. It may be that the concept is too simple. In the database field, logs are more used to synchronize data and indexes when the system crashes, such as redolog in MySQL. Redolog is a disk-based data structure used to ensure the accuracy of data when the system crashes. sex and completeness, also called pre-written log. For example, during the execution of a thing, redolog will be written first.
- LINUX 573 2024-06-22 04:57:09
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- Installing Google Chrome browser on Ubuntu and solving possible errors
- Installation 1. Download the deb package (Ubuntu is used as an example in the following article). Scroll to the bottom of the Google Chrome web browser and select other platforms->linux->deb package 2. Upload to Ubuntu dpkg-igoogle-chrome-stable_current_amd64.deb if prompted. Just install whatever is missing. ps: centos can use yum+rpm package name to find dependencies manually. Ubuntu has not tried apt to find the dependencies. 3. Under normal circumstances, the bid for Kirin Linux Deep Linux is completed. The installation is over at this point. Desktop The version of Ubuntu has a Microsoft browser menu icon for Linux such as
- LINUX 774 2024-06-21 19:17:49
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- Solve the problem that the network card configuration file cannot be found after adding a new network card in CentOS
- After using the VMware Workstation virtual machine to install the CentOS7 virtual machine, there is a problem that CentOS7 does not have a network card configuration file after adding a network card. After adding a second network card, after entering the CentOS7 system, the network card configuration file cannot be seen. After entering the CentOS7 system, use ipaddr to check the status as follows: It is found that both ens33 and ens77 have IP addresses and can be used normally. ens33 uses a manually configured IP, and ens37 uses an IP address automatically obtained by dhcp, but /etc/sysconfig/ The ifcfg-ens37 configuration file cannot be found in the network-scripts/ directory. Solution: 1. Use
- LINUX 728 2024-06-21 08:04:48
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- Best Way to Install Google Chrome Browser on Ubuntu Linux Using Terminal
- We can install Google Chrome browser on Ubuntu Linux using both GUI and command line methods. How to install chrome in linux, however, the terminal is the best way to configure Chrome browser. Here, we discuss how to use it. There are dozens of browsers, and even Linux systems like Ubuntu come with their own default browser Mozilla Firefox. But how to install chrome on Linux, many people are either not satisfied with it, or they just want to install their favorite browser, such as Chrome. Installing applications on Linux is not difficult, but what are the best ways to do it? In fact, it is a terminal, because it only requires a few commands
- LINUX 1230 2024-06-21 06:12:53
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- How to unzip zip folder in Linux system? Detailed steps to share
- How to unzip zip folder in linux? In Linux systems, you can use the unzip command to unzip a zip folder. The following are the specific steps: Open the terminal: In Linux systems, you can open the terminal by clicking the terminal icon or using the shortcut key Ctrl+Alt+T. Switch to the directory where the zip file is located: Use the cd command to switch to the directory containing the zip file. For example, if the zip file is located in the /home/user/ directory, you can enter the following command: cd /home/user/ to decompress the zip file: Use the unzip command to decompress the zip file. The following is the basic command format for decompressing zip files: unzip filename.zip such as, if
- LINUX 1273 2024-06-20 15:32:12
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- A brief discussion on the relationship between CPU, memory, virtual memory and hard disk
- Everyone knows that assembling a computer requires hardware such as CPU hard disk, memory, etc. The system also contains virtual memory. However, you may not understand the relationship between them! Below, I will introduce the relationship to you in the most concise and easy-to-understand language! CPUCPU is the central processing unit, which is the abbreviation of "CentralProcessingUnit" in English. The CPU fetches instructions from memory or cache, puts them into the instruction register, decodes and decomposes the instructions into a series of micro-operations, and then issues various control commands to execute the micro-operation series to complete the execution of system instructions. Memory However, the CPU cannot directly call the system, programs and data stored on the hard disk. The relevant contents of the hard disk must first be stored in the memory so that it can be read and operated by the CPU.
- LINUX 473 2024-06-20 13:43:28
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- How to use OpenSSL to encrypt and decrypt files
- OpenSSL uses cryptographic methods to encrypt or decrypt files 1. Use openssl to encrypt a file (data.zip is the original file, back.zip is the encrypted file) #opensslenc-e-aes256-indata.zip-outback.zip explanation: enc means Symmetrically encrypt or decrypt the file, -e means to encrypt a file, -aes256 means to use the aes256 algorithm for encryption, -in means the file that needs to be encrypted, -out means a new file generated after encryption. During the encryption process, you will be asked to enter an encryption password. Enter it twice to complete the encryption of the file. 2. Use openssl to decrypt.
- LINUX 1039 2024-06-20 08:40:18
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- The importance of Linux file owner role and permission analysis
- Linux is a multi-user, multi-tasking system. Many people often work on one machine at the same time. In order to protect everyone's privacy, the role of the "file owner" becomes very important. When a Linux user logs into the system, he or she will also carry a user identity (UserID, UID) and a user group identity (GroupID, GID), which are equivalent to their own business cards. When you need to access a file or program, you can check whether it can be read, written, and executed by swiping your business card. . Enter ls-l in the root directory to see the following information: Each record consists of 7 parts. The linux file is authorized to the user, with lrwxrwxrwx.1rootroot7Aug1821:27bin->us
- LINUX 1077 2024-06-20 07:37:13
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- Build an http server on Linux to realize interaction between client and server
- There are many services that can be built on Linux. The most basic service is to provide a corresponding socket for the web, allowing the client to obtain network data and realize communication between the client and the server. Especially when building web services on Linux in the era of China Unicom Internet, the mobile client is mainly used to display corresponding information due to its weak calculation ability, and obtain the information that needs to be interpreted through interaction with the web server. This is also a basic application of the web. It is easy to build an http server on Linux. It is more convenient to install software under Linux when installing nginx server. Many organizations maintain a set of software sources. Through the installation command, you will know to download the corresponding application from this software source and install it locally. Installation commands under ubuntu
- LINUX 1268 2024-06-20 06:06:25
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- Reasons and solutions why CodeBlocks cannot be compiled
- CodeBlocks16.01 latest version Baidu Cloud download (installation package includes compiler) https://pan.baidu.com/s/1kWjtmKJCodeBlocks Why can’t I compile? 1. The installation package you downloaded does not contain the compiler. Please go to the Baidu Cloud link shared above to re-download the installation package. 2. You installed CodeBlocks in a drive other than the C drive (such as the D drive, E drive, etc., or although it was installed on the C drive, it was customized to be installed in another directory other than the default directory during installation) , causing the system to be unable to correctly identify the address of the compiler (this may be a design flaw in the software itself). Please try uninstalling and reinstalling, and install the software on the C drive during installation.
- LINUX 879 2024-06-20 00:17:02
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- Teach you how to use the Head plug-in in Elasticsearch
- For basic environment Elasticsearch cluster construction, please refer to the previous article http://www.cnblogs.com/aubin/p/8012840.html System node name IP software version CentOS7.3els1172.18.68.11Elasticsearch6.0CentOS7.3els2172.18.68.12Elasticsearch6. 0CentOS7.3els3172.18.68.13Elasticsearch6.0 1. Install the plug-in official website address https://github.com/mobz/elasticsea
- LINUX 398 2024-06-19 13:31:50
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- rar software decompression installation package and connection command tutorial
- Ⅱ Unzip the installation package============================================== ====================The rar software does not need to be installed. Decompress the linux Eden Forum directly, for example, decompress it to /usr/local: tarzxvfrarlinux-x64-4.2.0.tar .gz-C/usr/localⅢ connection command ========================================== =========================After decompression is completed, in /usr/local/rar
- LINUX 748 2024-06-19 09:34:56
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- A brief history of data center network technology
- The data center network is actually a local area network, with two major parts: data and storage: the storage network is mainly FC technology, and now IPSAN, storage based on Ethernet IP forwarding, has appeared. Overall, the technology of storage networks is not developing very fast, and there are many tricks. Not so much that no one talks about it to this day. Data is a larger part of the data center network, mainly Ethernet network protocols. Looking through the RFC, it is not difficult to find that there are too many network protocols and features of Ethernet. The development of these protocols is actually the history of network technology. Each of them The protocols are constantly being improved, and after practical application, they are constantly being repaired. Of course, there are also some protocols that are not applicable and have been abandoned early. Few people update and improve them. Here, we are not trying to reconstruct the development history of network technology.
- LINUX 1086 2024-06-19 09:21:38
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- Explore typing games under Linux: Introduction to source code and full-stack development
- Typing game under linux The next game under linux, with program source code java key typing game source code-MSIKLM: Use Linux to control the SteelSeries keys of your MSI gaming computer java key typing game source code The usual MSI key light manager (MSIKLM ) is an easy-to-use tool that allows you to configure SteelSeries keys for MSI gaming computers on Linux/Unix. The method is almost the same as the configuration of SteelSeriesEngine on Windows... python from entry to full stack development · Getting started At the same time, python can also be used as an APP
- LINUX 962 2024-06-19 08:59:51
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- Linux system permissions analysis: permission classification and representation methods of ordinary files and directories
- The Linux system has many permissions. Although the purpose is to serve user security and make it more difficult to understand, here I will summarize the permissions of Linux according to file types. 1. Ordinary files and directories. For ordinary files and directories on the Linux system, there are three Types of permissions: rwx permissions, hidden attribute permissions and ACL permissions 1. rwx permissions (1) Use numbers to represent rwx permissions. r represents read permission; w represents write permission; x represents execution permission. The Linux system has three identities: owner (u), group (g) and other people (o). The Linux system uses 0 to indicate that permissions are turned off, and 1 to indicate that permissions are turned on. So how to install LINUX for any file? All possible combinations of owner permissions are 8
- LINUX 553 2024-06-18 15:50:44
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