How to skip SSL certificate check in wget

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 installation under Nginx fails to upload and prompts insufficient space

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!