JW Tech Tips

To change the IP address of your OpenWRT router, you could edit it through the SSH or plug the keyboard and monitor to your custom build router. Step 1: type in vi /etc/config/network in your console, then press ENTER Step 2: Press “i” on your keyboard to enable edit mode, then change the IP address to whatever you want. Step 3: Press “Esc” key, type :wq (w means write, q means quit), then press ENTER to apply. Last Step: type…

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The Raspberry Pi Foundation today (June 24) officially released the Raspberry Pi 4 Model B. Raspberry Pi is a world-renowned basic computing microcomputer, which is highly sought after by developers, programmers, geeks and other people around the world. This generation of Raspberry Pi 4 Model B has been developed for 3 years. The memory (RAM) has been upgraded from 1GB to 4GB. The introduction of USB 3.0 supports dual-screen 4K output, and the CPU and GPU are faster. H.265 decoding….

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Have you ever known where the charm or power of Linux comes from? That is, because of the numerous distributions, the Linux camp is growing, and each distribution has a large number of users. Developers voluntarily invest in related projects. Linux distributions can be described in a variety of ways, and they are designed to meet every desired demand. This article is intended to give a brief account of why a distribution exists, what the target users of the distribution…

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I know what you are thinking: The Raspberry Pi can only be used in tinkering, prototyping and personal hobbies. It can’t actually be used in business. There is no doubt that this computer has a relatively low processing capacity, a vulnerable SD card, a lack of battery backup, and a supported DIY nature, which means it won’t be a professional that can perform the most critical operations at any time. A viable alternative to a well-installed, configured commercial server. But…

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Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git is easy to learn and has a tiny footprint with lightning fast performance. It outclasses SCM tools like Subversion, CVS, Perforce, and ClearCase with features like cheap local branching, convenient staging areas, and multiple workflows. This cheat sheet summarizes commonly used Git command line instructions for quick reference. Configure Git Configure user information (username email) for all local repositories git config –global…

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BBR brief introduction BBR is a TCP congestion control technology developed by the Google community. It is currently in the early stages of development, but the prospects are great, and everyone can continue to pay attention, while BBR is integrated into the kernel with the latest version of Linux. Specifically, what is the TCP congestion control technology? I don’t understand the details. I will explain it in a plain way. It is not necessarily accurate. Just look at it and…

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Many beginners in the early to Linux, will be as used to visualize the operation of Windows and not suited to operate Linux pure command line, some basic Linux commands have to go to Google search Linux command, this is a waste of time, so I would simply organize a number of Linux Basic commands are provided to novices, and there may be advanced and advanced articles in the future (maybe This article is not only written for novices, but…

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Click Here to BandwagonHOST homepage BandwagonHost is a cheap and highly reliable VPS host. This US IT7 company’s VPS hosting solution with a low-cost annual OVZ architecture. Because of its cheap price, and relying on the business is more reliable, at least concerned about the signs of not seeing the drug running for so long, and we can see that the official has been upgrading and expanding product quality. For example, the early four solutions hard disk and traffic cannot…

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System administrators often need SSH or telnet to log in to a Linux server remotely, often running tasks that take a long time to complete, such as system backups, FTP transfers, and so on. Usually, we open a remote terminal window for each of these tasks because they take too long to execute. You must wait for them to complete, during which you can’t close the window or disconnect, otherwise, the task will be killed and everything will be abandoned….

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