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- Two Linux tips: tmux common commands and shortcut keys/query network ports
- Common tmux commands and shortcut keys tmux (terminal multiplexer) is a terminal multiplexer on Linux that can manage multiple terminals from one screen. Using this tool, users can connect or disconnect from sessions while keeping the terminal running in the background. Similar to screen users. Basic command 1, create a new session tmuxnew-s session name 2, detach the session tmuxdetach session name, you can also use ctrl+d to detach the session and return to the shell. After separation, the session does not disappear, but continues to exist in the background. 3. To connect to a session, we can view the sessions existing in the background through tmuxls or tmuxlist-session. tmu
- LINUX 671 2024-02-13 16:42:12
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- Master Linux memory management and improve your program performance!
- As an operating system widely used in servers and embedded devices, Linux occupies an increasing market share. In these scenarios, memory management is crucial because it directly affects the performance and stability of the system, especially for programmers. For programmers who want to develop high-performance applications on the Linux platform, proficiency in Linux memory management is a must. Today we will introduce an article that every programmer should read: Linux memory management. What you need to know about the memory part: address mapping, memory management methods, page fault exceptions, let’s first look at some basic knowledge. From the perspective of the process, memory is divided into two parts: kernel state and user state. The classic ratio is as follows: from user state to kernel state.
- LINUX 862 2024-02-13 16:40:16
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- Install smbclient on CentOS and install vim on CentOS
- In the CentOS operating system, smbclient and vim are two very commonly used tools. smbclient is a client tool used to communicate with SMB/CIFS servers, and vim is a powerful text editor. This article will introduce in detail how to Install smbclient and vim on CentOS and provide some related usage tips. 1. Open a terminal and log in as root user. 2. Run the following command to update the system package list: ```yumupdate3. Run the following command to install smbclient: yuminstallsmbclient4. The system will prompt you to confirm the installation, press the y key and press the Enter key to
- LINUX 1094 2024-02-13 16:30:10
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- Linux UUIDs: Unlocking the secrets of file system identification.
- In Linux systems, each file system has a unique identifier called UUID. Understanding the concept and role of UUID is very important for Linux system administrators. This article will introduce you to the basic principles and usage of UUID in detail to help you better manage your Linux system. There are many utilities available to view UUIDs. In this article we will show you multiple ways to view UUIDs, and you can choose the one that suits you. What is UUID? UUID stands for UniversallyUniqueIdentifier, which can help the Linux system identify a disk partition rather than a block device file. Since kernel 2.15.1
- LINUX 675 2024-02-13 16:27:12
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- A technique for Linux system programming: using fcntl() to implement read-write locks
- Read-write lock is a commonly used synchronization mechanism, which allows multiple processes or threads to perform concurrent read operations or mutually exclusive write operations on the same resource, thereby improving the efficiency and security of the system. In Linux system programming, there are many ways to implement read-write locks, such as using the pthread library, using file locks, etc. This article will introduce you to a method of using the fcntl() system call to implement read-write locks, as well as its principles, usage, advantages and disadvantages, so that you can better use and understand this technique in Linux system programming. When multiple processes read and write access to the same file, in order to ensure the integrity of the data, the file needs to be locked. Files can be locked and unlocked through the fcntl() function. \1.fcn
- LINUX 834 2024-02-13 16:03:24
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- In-depth discussion of the implementation principles and related technologies of Linux Kernel suspend/resume process
- In the Linux kernel, the suspend/resume process is a very important process. It can realize system sleep and wake-up, and improve the system's energy efficiency and response speed. In this article, we will delve into the implementation principles and related technologies of the LinuxKernelsuspend/resume process. Hibernation/wakeup is a very important part in embedded Linux. Embedded devices enter sleep state as much as possible to extend battery life. This article will introduce in detail how hibernation/wakeup works in Linux. Reference article: Author :zhangjiejingDate:2010-04-07,http://www.thinksrc.co
- LINUX 658 2024-02-13 15:45:25
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- Centos installs openshot and centos installs openfoam
- Directory introduction to this article: Centos installation openshot update system add epel repository installation openshot Centos installation openfoam installation dependent software download openfoam decompression and installation configuration environment variables verification installation share LINUX with you Preface: LINUX, as an open source operating system, is widely used in various fields. On LINUX systems, users can install and configure various software according to their own needs and preferences. This article will introduce how to install two commonly used software on Centos systems: openshot and openfoam. Centos installs openshot1. Update the system. Before installing any software, you first need to make sure
- LINUX 1169 2024-02-13 15:39:30
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- U disk installation Linux installation error and solution
- After seeing "This is How You Should Learn Linux" on the Internet, I made up my mind to return after having been away from the software industry for many years! This article is my personal experience as a novice, I hope it can be adopted! I started to install a virtual machine on my machine as mentioned in "This is How You Should Learn Linux" and it ran very well. Later, I saw someone in the exchange group installed rhel7 on his old laptop and it was running normally. I was deeply inspired and decided to try installing rhel7 on my Haier x208. However, there was a problem during the installation process. No one answered the questions in the communication group (perhaps the question was too simple or the information provided was insufficient), and Du Niang could not give a good answer. After some fussing, I finally found the solution. Download the image. Download the rhel7 image. I use it.
- LINUX 1023 2024-02-13 15:36:03
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- The Linux terminal command line can also be used to view images
- There are a large number of GUI applications available for viewing images in Linux. To be honest, I haven't used any command line application that displays pictures in the terminal itself. Luckily I found 2 command line image viewers to display images in the terminal. These applications may be useful for those who want to use a CLI alternative for GUI applications and spend most of their time in Terminal. 1. Display images in the terminal using Viu Viu is a command line application for viewing images from the terminal. It is a free and open source CLI image viewer written in the Rust programming language. Using Viu we can; display popular image types including .jpg, .png, igif and more. in custom size
- LINUX 1190 2024-02-13 15:33:11
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- How to use SWAP, Cache and Buffer in Linux reasonably?
- In the Linux system, the three concepts of SWAP, Cache and Buffer often appear in front of us. What do they mean respectively? Simply put, SWAP refers to the virtual memory swap area, Cache refers to the buffer area, and Buffer refers to the input and output buffer area. Their use in Linux systems plays a vital role in the performance of the system. However, different application scenarios and different applications occupy and use these three cache areas differently. How can we use them more rationally? Next, this article will introduce it to you in detail. **1. View Linux memory through the free command**total: total memory size. used：already
- LINUX 1142 2024-02-13 15:30:17
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- How to use JNI to call C/C++ code under Linux
- Have you ever thought about using the functionality of C or C++ in a Java program? Do you know what JNI is and how it allows you to implement cross-language programming under Linux? If you are interested in these questions, then this article is for you. This article will introduce the basic concepts of JNI, as well as the steps and examples of how to use JNI to call C/C++ code under Linux. Define a Java class—Hello class publicclassHello{static{try{//This is the link library name where the local method is located System.loadLibrary("hello");}catch(UnsatisfiedLinkErrore){Syst
- LINUX 1049 2024-02-13 15:30:04
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- Four great tools for generating strong passwords under Linux
- Security is a big topic, and it is very important to set a strong password for the server. You may be wondering what a strong password actually looks like? How can you generate a password like that? Don’t worry. Below we will introduce 4 simple ways for you to generate a strong password in Linux. 1. Use OpenSSL to generate a strong password in Linux. Use openssl in all Unix-like distributions, Solaris, MacOSX and Windows. This tool uses OpenSSL to generate a random password. Open a terminal and run the following command: opensslrand-base64 The "-base64" parameter above will ensure that
- LINUX 977 2024-02-13 15:27:03
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- 7 Myths About Linux You Should Stop Believing
- Linux distributions are powerful, reliable, and easy to use, but there are too many misconceptions about Linux on the Internet. The internet is filled with myths (or untrue claims) about almost everything, and there are always people ready to spread these misconceptions. If you often read about Linux in some online forums, then you are likely to come across some well-known Linux myths. Here are some myths about Linux that are spreading like wildfire across the internet. 1. Linux is for developers and coders only The history of Linux has always been closely associated with programmers, and even today, most people who contribute to the project are software developers. This is why most average desktop users think
- LINUX 1262 2024-02-13 15:24:12
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- CentOS7/8 installs Linux kernel 5+ or above
- CentOS is known for its stability, and stability on the other hand means conservatism. So CentOS7 is still using 3.10, and CentOS8 is only 4.18. The latest LinuxKernel has been updated to 6.0rc3. Other newer distributions use version 5.10+. This article briefly introduces how to directly install the third-party kernel version 5.1+ or above on CentOS7 and 8. The kernel version provided by the 5.15 Kernel package ELRepoProject compiled using teddysun has always been relatively stable, but this library kernel-ml will no longer provide the old version after the new major version comes out. For example, kernel-ml branch 5.15
- LINUX 1003 2024-02-13 15:21:11
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- Looking at the way to improve Linux system storage performance from the rapidly developing NVMe technology
- With the rapid development of big data, cloud computing, artificial intelligence and other applications, the demand for storage performance is getting higher and higher. The early SATA interface and AHCI protocol can no longer meet this demand. In recent years, NVMe technology based on the PCIe bus has gradually become the new favorite in the storage industry, with advantages such as high speed, low latency, and high concurrency. This article will explore how to use NVMe technology to improve storage performance in Linux systems. My laptop has an NVMe drive and so does my desktop. And they're fast. I love how quickly my computers boot up and how quickly they read and write data. There is almost no lag. It didn't take long for me to become curious about the technology driving this ultra-fast storage, so I did some research. Me
- LINUX 559 2024-02-13 15:18:24
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