In this article, we will look at how to install and configure a Squid proxy server with HTTPS filtering support on Linux (Ubuntu 20.04 in this example).
Continue reading “Installing a Squid Proxy with Transparent HTTPS Filtering”
Category: Linux
Webmin is an open-source web interface service for managing Linux. You can use Webmin to perform typical Linux administration tasks from a graphical web interface instead of a command-line shell. In this article, we’ll look at how to install and configure Webmin in CentOS and Ubuntu.
After installing Windows guest in a virtual machine on a KVM host, you must install the correct device drivers for virtual hardware (KVM VirtIO drivers). Without these drivers, guest Windows won’t be able to recognize virtual network adapters and a number of other virtual hardware.
Continue reading “Installing KVM VirtIO Drivers in a Windows Virtual Machine”
Let’s look at how to send an email notification when logging into a Linux server remotely via SSH. We’ll use postfix to send email alerts and the Gmail SMTP server as a relay host.
In this article, we’ll show you how to clone (copy/migrate) an installed Linux operating system to another (new) drive. The article shows the process of cloning Debian or Ubuntu, but it also applies to Red Hat/CentOS/Fedora Linux distros.
Continue reading “Cloning Linux Installation to Another Disk”
Most modern computers and laptops released after 2016 already have a built-in TPM chip. TPM (Trusted Platform Module) is a special chip used as secure storage for encryption keys, passwords, and certificates. TPM can be used for various security apps such as key vault, secure boot, random number generation, etc. Let’s see how to check if a device has a TPM chip in Linux.
Continue reading “How to Check if Your Linux Device Supports TPM 2.0?”
In this article, we’ll look at how to check for Bluetooth adapters on a Linux computer or laptop, and how to find out the Bluetooth version.
Continue reading “Check Bluetooth Adapter Version and Status on Linux”
Let’s see how to fix the “MySQL server has gone away” error that appears when accessing MySQL Server.
The most common causes of the MySQL server has gone away error are:
- Packet size too large in MySQL query (default maximum packet size is 16 MB);
- You ran out of free RAM on the MySQL host (you can check the free memory in Linux using the free –h command;
- The inactive connection between your application/script and MySQL (by default, the session disconnects after 8 hours).
OpenVPN allows you to allow multiple concurrent user connections with the same certificate. To do this, the duplicate-cn option is used in the server.conf configuration file.
Continue reading “OpenVPN: Allow/Deny Multiple Connections Per User (Certificate)”
In this article, we’ll show you how to configure monitoring of a standalone VMware ESXi host with Zabbix. On ESXi, you cannot install zabbix-agent to enable classic monitoring. However, Zabbix can use SOAP (Simple Object Access Protocol) to communicate with ESXi using XML-RPC format messages.
Continue reading “Zabbix: Configuring VMware ESXi Host Monitoring”