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How to tell if a port is open given an IP address in macOS

April 7, 2026
 |  No Comments
 |  command, information, internet, macos, port
the command is: hostname is a string as ‘www.google.com’ or ‘abcd’

be able to ping one’s own PC/server (from internet)

April 6, 2026
 |  No Comments
 |  command, configuration, information, internet, linux, Linux Ubuntu Server, macos, server, windows
By default, in the router’s “firewall” settings, option “Block Anonymous Internet Requests” is enabled and blocks ping You need to disable it and save it […]

hosts in windows

April 5, 2026
 |  No Comments
 |  configuration, console, information
It’s for IP redirection It is a Name to IP mapper. IP-to-IP redirection doesn’t work; only hostname as a string to IP address redirection works. […]

Create an HTTP server in Python on port xxxx to access/download files from a folder

April 4, 2026
 |  No Comments
 |  command, configuration, http, information, internet, linux, Linux Ubuntu Server
First you need to have Python or Python 3 installed, then you have the command ‘python3’ Setting up a fast HTTP server (The easiest way)Since […]

that a Docker container restarts if the system restarts

April 3, 2026
 |  No Comments
 |  configuration, docker, information, script
You must put this in each docker-compose.yml service example: command: content: then (Apply the changes): Docker is also a systemctl service First, check if you […]

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