Quickly apply for domain name certificates and automatically renew them. Certbot is a free and open source software tool for automatically using Let's Encrypt certificates on manually managed websites to enable HTTPS.
Enable Gzip compression for your website, effectively save 30% traffic and improve access speed! Gzip is a technology for website compression acceleration. After it is enabled, it can speed up the opening speed of our website. The principle is that after the server compresses, the client browser quickly decompresses it, which can greatly reduce the website traffic. After Nginx enables the Gzip compression function, it will greatly improve nginx access performance!
Swap is similar to the virtual memory of Windows, but the difference is that Windows can be set under any drive letter of Windows, and the default is C drive, and can be placed in the same partition as the system files. Linux, on the other hand, occupies an independent partition, which is convenient for putting part of the content in the swap partition when the memory demand is insufficient, and continue to execute when there is free memory, also called swap partition, and swap space is part of it.
CentOS comes from RedHat, so CentOS supports installation in rpm format, but Ubuntu obviously does not. After all, they are different distributions made by different companies, and the locations of many configuration files and the default file paths are very different. This needs to be slowly experienced during use.
ImageMagick is a software used to create, edit, and synthesize images. It can read, convert, and write images in multiple formats.
Functions include: image cutting, color replacement, application of various effects, image rotation, mirroring, writing text to images, etc.
Alibaba Cloud Centos8 builds LNMP environment and installs wordpress After setting up the centos8 operating system in Alibaba Cloud, do some basic settings first. Alibaba Cloud installs wordpress
I edited the startup file in Windows and uploaded it to the Linux server. The file was in the directory, but when I started the file, it said "No such file or directory". I checked the contents of the startup file repeatedly and found nothing wrong. It turned out that the problem was with the carriage return character.
When I copied the file test.txt written in vim on Linux to Windows, all the contents were displayed in one line. When I copied the test.txt created on Windows to Linux, the Linux program ran abnormally. When you write a Linux shell script on Windows and copy it to Linux to run, problems will occur. The problem lies in the line break character ^M!
By default, when you use wget to download files, wget will perform a validity check on the website's SSL certificate. Because SSL itself relies on the validity and verification of the certificate. Sometimes, you may want to bypass it. For example, when using wget to try to access a website with an expired SSL certificate or a website with a self-signed certificate.
NextCloud was installed quickly on the server, and the server environment was centos7+php7.4.3+nginx+mysql. Since it was installed manually before, something strange happened after NextCloud was installed. Everything worked well, except for uploading. When I clicked upload, it prompted that there was insufficient space. I thought it was a problem with the PHP extension!
