How to fix error can’t ping AWS EC2 instance IP
Open inbound traffic for AWS EC2 instance Step 1: open EC2 dashboard -> Instances Click current security group to edit Step 2: Click Inbound then…
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The Open Graph protocol for video
Introduction The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook…
GIT: how to clone a specific branch
You can use this command: or Example 1: Example 2:
How to use memcached with replication on CentOS
Repcached is memcached which implemented multi master asynchronous replication feature. Download source code. Repcached key features Multi master replication. Asynchronous data repliacation. Support all memcached…
How to install telnet client on Windows Server 2008
Step 1: go to Start->Control Panel Step 2: choose Programs and Features Step 3: click Turn Windows features on or off Step 4: click Features->Add…
DDOS protection with Nginx and Cloudflare
Method 1: Step 1: Get all IP range of cloudflare: https://www.cloudflare.com/ips-v4 and https://www.cloudflare.com/ips-v6 You see: and Step 2: Config Nginx Method 2: Config Nginx:
FFmpeg: How to limit CPU usage
I have a server with 4core, when i run a command ffmpeg, cpu load high: CPU load about 3 to 4: How to reduce CPU…
How to fix error: “413 Request Entity Too Large” when upload files
When upload files, you might got the error “413 Request Entity Too Large”, how to fix this error? Add or modify client_max_body_size in your config…
How to create video thumbnail with FFmpeg
Create one thumnail: Method 1: you can specify frame number Result: Method 2: you can specify frame time Method 3: you can specify thumnail size…
How to get video duration with ffmpeg
Method 1: Example: See this method with PHP: PHP: How to fix error shell_exec can’t run some command on Linux Method 2: Example: Method 3:…