If you run a firewall on your Linux server and want to use passive FTP connections, you have to define the passive port range in pure-ftpd and your firewall to ensure that the connections don't get blocked. The following example is for pure-ftpd on Debian or Ubuntu Linux and ISPConfig 3. Set Passive Port Range ... Read more
YARN package manager is a tool for managing yarn. The acronym stands for “Yet Another Resource Negotiator”, and that is what the package manager does: it negotiates with other packages to determine which will consume resources and when without user intervention. The design of this system was inspired by Node’s npm and Python’s pip, but ... Read more
Getmail is a powerful email retrieval program for Ubuntu Linux that can be used to download and store emails from remote mail servers. It supports POP3, IMAP, and SDPS protocols, so you can configure it to work with your current email provider to download messages and store them on your local computer or server. Additionally, ... Read more
This tutorial shows you how to configure Postfix mail server on Ubuntu 22.04 to relay email through Gmail. The first step is to install Postfix (if you have not done that yet). Install Postfix SMTP server sudo apt-get install postfix mailutils libsasl2-2 ca-certificates libsasl2-modules Configure Postfix to relay email Now open the Postfix main configuration ... Read more
Mono Framework is an open-source software framework that can be used to create all kinds of Server and Desktop applications, incl. games. Mono Framework is dependency-free (No C++ compiler required) and compatible with Windows, Linux, Mac OS X and FreeBSD. Mono Framework started as a fork of Microsoft’s .Net Framework v1.0 but now has become ... Read more
Gradle is a build automation tool with a focus on extensibility and performance. It can perform tasks related to software compilation, deployment, testing, static analysis (e.g., linting), and more. Gradle is straightforward to learn if you are new to automated builds or want an alternative solution for any of the above tasks that your current ... Read more
This short guide will show you how to revoke and safely remove an SSL certificate that was obtained using the acme.sh let's Encrypt client. To remove a Let's Encrypt SSL certificate using the acme.sh command on Linux, follow these steps: Connect to your server via SSH or open a command prompt (console). Run the command: ... Read more
A database is a place where you store information. Cassandra is a type of database that is different from most databases because it does not use tables. Cassandra was developed by Facebook in 2008 as part of Facebook’s Open Compute Project. Cassandra is a NoSQL database that combines the speed of a key-value store with ... Read more
Puttygen is a tool to generate public and private SSH Keys in server applications. The SSH keys are created in the pkk format by putty but they can also be converted into other formats as used by OpenSSL. PuttyGen is available for Windows, Linux & Macintosh computers (MacOS). Putty comes with a GUI for Windows, ... Read more
You might have noticed that Ubuntu has since version Ubuntu 22.04 started to show the following message when you install or update software: Which services should be restarted? While there might be cases where you have a setup that requires a specific service not to be restarted automatically after an update, in most cases, it's ... Read more