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Solved "ERROR! flex not found" on Ubuntu/Debian Linux
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Solved “ERROR! flex not found” on Ubuntu/Debian Linux

In this article, we will see how to solve error flex not found on Ubuntu/Debian Linux system. Recently, I was trying to install an application from source code on my Ubuntu Linux system but as soon as I ran configure script, after a while I noticed it failed with error flex not found. Digging further […]

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How to Host Your Own Mastodon Server on a VPS

Running your own Mastodon server on a VPS is an excellent way to enjoy an efficient and secure Mastodon experience. In this article, we’ll guide you through the installation and configuration of a Mastodon server on Linux VPS. It is essential to select a server that meets your requirements. That means selecting one with an

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Why and How to Buy a Linux VPS With Bitcoin?

When you buy a Linux VPS with Bitcoin, you are getting a private virtual server with dedicated resources like CPU, RAM and network bandwidth. By combining the security and performance of VPS with the privacy and convenience of Bitcoin payments, users have more control over their data. Crypto currencies offer numerous advantages when it comes

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How to enable port 465 (smtps) in postfix mailserver

More and more internet access providers are closing port 25 to reduce spam except for connections to their own mail servers. If you run your own email server and have problems connecting to it on port 25, you can enable port 465 (SMTPS) in postfix as a workaround. Edit the /etc/postfix/master.cf file: nano /etc/postfix/master.cf and

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Debugging of ISPConfig 3 server actions in case of a failure

The following article describes the steps that need to be taken to debug ISPConfig 3 server scripts. This procedure applies to all ISPConfig 3 versions incl. ISPConfig 3.1 and ISPConfig 3.2. Enable the debug Loglevel in ISPConfig Login to the ISPConfig interface and set the log level to Debug under System > System > Server

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Linux Basics: How to view log files on the shell

Most Linux servers are administered on the command line e.g. through an SSH connection. In the following tutorial, I will explain several shell commands that make it easy to view log files on the Linux command line (shell). These commands will work on all major Linux distributions incl. AlmaLinux, CentOS, Debian, Fedora, RockyLinux, and Ubuntu.

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Get the disk health status with SMART monitor tools on Debian and Ubuntu Linux

Every current disk includes a built-in monitoring feature known as SMART that keeps track of faults. On Linux, there is a software package called smartmontools that may be used to query the SMART status of the disk to see if it will fail soon. Installation apt-get install smartmontools Usage First we need to know the

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How to prevent a Linux system user from logging into the system

The shell setting in /etc/passwd determines whether a Linux system user may log in via the shell or over SSH. If you don’t want a certain user to be able to log in, set the shell to /bin/false or /sbin/nologin. For the user “otheruser” on Debian and Ubuntu Linux, here’s an example: usermod -s /bin/false

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Get a list of all virtual hosts which are defined in all apache configuration files

Have you ever looked in the apache config files to see where a website’s virtual host is defined? The apache2ctl script has a useful option that could come in good here. When you execute the command, it should look like this: apache2ctl -S You’ll obtain a list of all virtual hosts and default servers in

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