You can use the following guide to check HDD, SSD, and NVMe drives. Either by checking the read/write speed of the device compared to the average or by investigating its SMART attributes. The results of the tests can be used to determine if a disk has to be replaced. To recognize the disks in your […]
Category: Linux
Guides and tutorials for Linux distributions
How to do a speed test
Due to many false positives and the way speedtest.net is being used to test we hereby give you a better solution to test your network speed. The speedtest.net application uses only one transfer thread with a single server. As we don’t know the actual network load or speed of the nearest speedtest.net server this is […]
How to improve your SSH security
With Secure Shell (SSH) a default configuration can be vulnerable to hackers who are trying to gain access to your server. In this guide, we will provide you with a few configuration changes on how you can improve the security of SSH on your server. First, make sure that you have a user account with […]
How to reset or change a password
Did you forget the root password for your server? Not to worry, if you have local access to your server and your system is using GRUB as a bootloader you can follow our tutorial. This method works on most Linux operating systems but not limited to: Ubuntu, CentOS, and Debian. We have also included a […]
How to add or remove a user on your Linux server
In this guide, we will explain how to add and remove a user on your Linux server. There are small differences in the different Linux distributions. With Red Hat based distributions you will not be prompted to enter a password. With Debian based distributions you will be prompted to enter a password. You are also […]
How to configure IPv6
Introduction It is possible to request an IPv6 subnet for your Worldstream server. To request this you can contact us or open a ticket in your my.worldstream account. You can use the IPv6 address next to your IPv4 address. In this article, we will explain how to configure an IPv6 address on your server. Please […]
Firewalld basics
Introduction In this guide, we will explain the basics of the Firewalld tool. The Firewalld tool is used by default on CentOS 7.x and 8.x, but the tool can also be installed on other distributions of Linux. Basic commands With firewalld it is advised to use the firewall-cmd command. By default, this command only applies changes to […]
Iptables basics
Overview This guide is meant to explain and help with the setup of iptables. With this tutorial you should be able to perform the basic setup of iptables. With this Linux firewall tool you are able to improve the security of your server. In this article the following subjects will be covered: Basic explanation Basic […]
Ufw firewall basics
Introduction In this guide, the basics of the ufw firewall tool will be explained. The ufw firewall tool is used by default on Ubuntu 18.x however the tool can also be installed on other distributions of Linux. Ufw is a very straightforward command. Ufw stands for Uncomplicated Firewall. By default ufw is disabled. Below we […]
How to change the SSH port
The default SSH port is 22. If you wish to change the SSH port for your Linux server to for example 30200 you can do this the following way: Connect to your server with the default SSH port with the SSH client of your preference. Edit the configuration file with for example nano or vi […]