Category: Web & Network

Do not use Google Authenticator

After I change my old smartphone to LG Q6, I would like to transfer all apps to it. I used Google Authenticator for a bunch of websites as the Two-factor Authentication. I just found Google Authenticator cannot move all these accounts to my new phone. To do the transferring, I have to manually re-add it

Some changes on VPS

My site is moved to another VPS, but still with Linode. This time, it is at Fremont, CA. As I mentioned in my last post, the CPU is E5-2697 v4. There is a few changes on the default VPS. Turn on BBR. php opcache cache size from 128MB to 256MB MariaDB default collection from utf8mb4_general_ci

Change directives of Nginx

My new server uses Nginx as a web server. When I check the error log of it, I saw a lot of warnings. 2016/08/27 07:30:03 [warn] 11951#11951: *590544 an upstream response is buffered to a temporary file /var/cache/nginx/fastcgi_temp/3/28/0000008283 while reading upstream, client:, server:, request: “GET /download/file.php?id=109 HTTP/1.1”, upstream: “fastcgi://unix:/run/php/php7.0-fpm.sock:”, host: “” I did

Move to Linode Server

When you saw this post, it means the blog is moved to a new server at Linode. New server is a little bit better than the old one at DigitalOcean. Here is how old server looks like: Operating system     Ubuntu Linux 14.04.4 Kernel and CPU     Linux 3.13.0-88-generic on x86_64 Processor information     Intel(R)