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When installing Proxmox to an ext4 volume, the installer assigns the majority of your boot disk to "Local-LVM". This may not be desirable if you plan on using a secondary disk for VM storage, and would like to store more ISO images and backups in the root vo...

The default BookStack installation script for Ubuntu 20.04/18.04/16.04 only configures the Apache2 server to use HTTP, not HTTPS. With plain HTTP becoming more and more obsolete each day, you'll likely want to use HTTPS instead in combination with a Let's Encr...

By default, Proxmox configures your primary NIC (Network Interface Card) to work in bridged mode. For normal installations, this is the best configuration - VMs and CTs that you create automatically get assigned a DHCP address from your router so can easily ac...

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Zabbix is a great monitoring tool with tons of capabilities. One such capability is the use of proxies. These allow you to monitor other networks in addition to the network that your Zabbix server resides on. For example, if you run Zabbix on a VPS or dedicate...

When you install Windows, Windows assumes it is the only operating system (OS) on the machine, or at least it does not account for Linux. So it replaces GRUB with its own boot loader. What you have to do is replace the Windows boot loader with GRUB. I've seen ...

When using a school or work network, you may be required to install a Root CA certificate to allow you to browse to secure websites (those that use HTTPS, which includes most websites nowadays!). The Root CA certificate is required because the traffic is being...

The Let's Encrypt CLI certificate manager, certbot in it's standard configuration only supports two types of challenges: HTTP, which can be easily automated, but can't be used for the creation of wildcard certificates and DNS, which can be used to create wildc...

Preparing the Compute Instance Oracle's pre-prepared Ubuntu Server images have a lot of iptables rules configured, one of which disallows all incoming traffic apart from TCP port 22 (SSH) and ICMP. Since our Compute Instance is behind a NAT network (the Oracl...

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A reverse proxy is a function of a web server that allows it to forward requests onto other web servers. Typically they are set up in combination with a wildcard SSL certificate, allowing each subdomain to go to a different server. Apache2 and NGINX can both f...

Bonding Mode 5 (balance-tlb) works by looking at all the devices in the bond, and sending out the slave with the least current traffic load. Traffic is only received by one slave (the "primary slave"). If a slave is lost, that slave is not considered for trans...

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Proxmox allows you to create both Virtual Machines via QEMU, and Containers via LXC. Out of the box, LXC containers are much easier to provision, you download the template, create the CT and specify the username, password & IP address. Virtual machines take lo...

Lego is a Let's Encrypt ACME client written in Go that supports APIs provided by many DNS providers. I find it easier to install and use compared to the official Let's Encrypt certbot client. Installing Lego Lego is hosted on GitHub. Check their releases pag...

Ubuntu

This message will appear when the /tmp directory is full or has too many files/directories inside it. Since it prevents a successful boot, we will need to modify the boot options to fix it First, restart the affected system (Ctrl-Alt-Del or power cycle it) an...