Protecting your website from spam in comments

This article shows how you can effectively protect your website against spam-submissions in comments.

In order to improve the interaction with the visitors of this website, I allowed anonymous users to post comments to all published stories. Since feedback is quite low, I enforced administrator approval of all comments to stay in full control.

However, shortly after enabling comments for anonymous users, I received more and more emails telling me that new comments were posted which needed my approval.

CAPTCHA to the rescue!

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Time conversion using Bash

This article show how you can obtain the UNIX epoch time (number of seconds since 1970-01-01 00:00:00 UTC) using the Linux bash "date" command. It also shows how you can convert a UNIX epoch time to a human readable time.

Obtain UNIX epoch time using bash
Obtaining the UNIX epoch time using bash is easy. Use the build-in date command and instruct it to output the number of seconds since 1970-01-01 00:00:00 UTC. You can do this by passing a format string as parameter to the date command. The format string for UNIX epoch time is '%s'.

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Windows built-in command-line tools

A list of tools which are available on any Windows operating system.

General

  • date /t: shows the current date
  • time /t: shows the current time

Windows memory

  • mem /P: Displays status of programs currently loaded in memory.
  • mem /D: Displays status of programs, internal drivers, and other information.
  • mem /C: Classifies programs by memory usage. Lists the size of programs, provides a summary of memory in use, and lists largest memory block available.

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