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  • How do I find out if a remote system is still alive, if certain services are running, which processes are running, etc.?

    apache Author: adminTags: Comments: 0

    You can use ping to see if the system is alive: ping -c4 <system's IP address> To see if a certain service is still alive, use the telnet command: telnet <system's IP address> 25 (for SMTP) telnet <system's IP address> 80 (for HTTP) telnet <system's IP address> 110 (for POP3) You can login to the system using SSH (port 22) (use PuTTY if you are on a Windows PC; PuTTY is an SSH client for Windows), and when you are on the system, you have a few useful tools to gather more information:

  • Greylisting - fight Spam with Postgrey and Postfix on Debian and Ubuntu

    debian Author: erkTags: , , Comments: 9

    There are numerous ways to prevent spam from reaching your inbox, the most popular is probably SpamAssassin. Greylisting will not replace spam filtering software like SA but it will serve as a powerful first hurdle for spam thus reducing the ammount of spam entering the system at all.

  • Getting Things Done in the New Year

    Author: joeTags: Comments: 2

    Getting Things Done in the New Year Author: Joe Topjian <joe [at] adminspotting [dot] net> What a better way to start the New Year off than to get organized. There's this really cool Rails application called Tracks that will give you a web-based management interface for organization. Setting it up is pretty easy, and that's what I'll be going over here.

  • Screenshots

    android Author: adminTags: Comments: 2

    If you have made screenshots of a distribution not listed here, we would be pleased if you submitted them to us for publication on HowtoForge.Requirements:The screenshots should have a resolution of at least 800x600 pixels.Accepted image formats: .jpg, .gif, .png Please send your screenshots as .zip or .tar.gz archive to: [email protected]

  • How to Setup Port-Forwarding on OPNSense

    tux Author: Muhammad ArulTags: , Comments: 0

    This guide will show you how to set up NAT Port Forwarding on the OPNSense Firewall Router. We will allow public internet to access the server inside the private LAN. Allow SSH and HTTP connections from the public internet to the server on the private LAN.

  • Linux: How to burn a CD/DVD through the command line

    linux Author: Bill ToulasTags: , Comments: 0

    Carrying out common daily tasks such as burning a DVD through the comfort of a user-friendly graphical interface is, of course, a good thing, but unfortunately things don't always work as expected. When this is the case, Linux users can revert to the good old terminal to get things done no matter what. On this quick tutorial, we will see how Linux users can utilize the terminal to burn audio CDs, data DVDs or ISO images on a disk.

  • How to Install Paperless with Nginx on Debian

    debian Author: Karl WakimTags: , , Comments: 0

    Paperless is a Python application that ingests scanned documents, indexes them, and presents them in a user-friendly web interface. In this tutorial, we will install Paperless with an Nginx HTTPS reverse proxy on Debian 10.