JW Tech Tips

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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macOS usually take a long time to download and apply the update, and it requires to reboot. If you are tried to waiting for the slow progress bar to complete the software update. There is an easy way to update macOS faster with a single terminal command line. sudo softwareupdate -ia && sudo reboot Step 1: Open the terminal, the terminal icon looks like this Step 2: Type the following command in the terminal, then press “Enter” sudo softwareupdate -ia…

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Linux is a free, powerful and open source operating system, it has many different distributions, such as  Debian, Ubuntu, CentOS, RedHat, openSUSE,  Arch, Fedora, and etc. If you are a new Linux user, you will be confused about what version of your Linux machine. Here is the command to help you know your Linux OS version and distribution. Finding your distribution information by using “lsb_release -a” The lsb_release command gives Linux Standard Base and distribution-specific information on the Linux terminal,…

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There is the command to check your Linux time zone: date -R There is the command how to change your Linux timezone to Los Angles time zone: cp /usr/share/zoneinfo/America/Los_Angeles /etc/localtime  

Here is an easy way to remove ssh key on Mac OS X (maxOS) by command line. If you reinstalled your Linux system, and try to ssh it. You may get an error message from your Mac devices. ” @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ” @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ ” @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Then you may think how to remove the ssh key and reconnect to your Linux server. The solution is really easy, just type a short command in your Mac terminal….

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aaPanel, a simple but powerful control panel, can manage the web server through a web-based GUI(Graphical User Interface). aaPanel provides the one-click function such as one-click install LNMP/LAMP developing environment and software. Our main goal is helping users to save the time of deploying, thus users just focus on their own project that is fine. Source: https://www.aapanel.com/index.html Chinese version: https://www.bt.cn/ The installation is very simple, running the following command on your Linux machine by ssh or terminal. It supported CentOS,…

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If you have trouble with ifconfig not found in your Linux system, use the following commands: ip address ip a If you still want to use ifconfig, use the following command to install ifconfig. apt-get install net-tools