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Tech Notes

snippets and scripts that make life better. Some HOWTO docs and tutorials as well.

Deploy and Configure

Installation guides for popular and unknown software packages.

systems
install

Command line

Be a command line hero. Configuration tips, tricks, and things I often forget.

devops
systems

Other Things

Memes Certifications

Containers

Docker, Podman, Kubernetes, and OpenShift

XCP-ng / Citrix Hypervisor

Deploy and Configure

Citrix Virtual Apps and Desktops

Deploy and Configure

Networking

Command line

Linux

Command line

Mostly Red Hat and it's clones.

Apple macOS

Command line

Things I forget the macOS can do. Because you know, it's a UNIX.

VMware

Command line

vCenter, ESXi and NSX.

OpenShift

Containers

Security(ish)

Command line

commands the are mostly security and privacy related

Oracle Things

Deploy and Configure

Web Applications

Deploy and Configure

Identity and Access Management

Deploy and Configure

Automation

Deploy and Configure

or the lie that is DevOps

devops
systems

Windows

Command line

Yeah, Windoze is here too

Kubernetes

Containers

Containers

Containers

Docker and Podman commands

ZFS

Deploy and Configure XCP-ng / Citrix Hypervisor

If you do this, you will break something. DO NOT run production on this SR. If you do, I hope you trust your backups. Install/enable ZFS on your hosts On each host that you want to run ZFS: yum install --enablerepo="xcp-ng-extras" blktap vhd-tool Install Z...

Storage Repositories

Deploy and Configure XCP-ng / Citrix Hypervisor

New local SR xe sr-create host-uuid=<uuid> content-type=user name-label="<name>" \  shared=false device-config:device="</dev/disk/by-id/device>" type=ext   Fixes Fix the Command not permitted while global/metadata_read_only is set message...

BookStack on CentOS 7

Deploy and Configure Web Applications

BookStack is a simple, self-hosted, easy-to-use platform for sharing and storing information. What you need: Fresh install of CentOS 7 or other RHEL7 clone. EPEL and IUS Community Project repositories. Add the repositories yum -y install epel-release  yu...

Matomo on CentOS 7

Deploy and Configure Web Applications

Installing Matomo Matomo, formerly known as Piwik, is an open source web analytics application. It rivals Google Analytics and includes even more features and allows you to brand your brand and send out custom daily, weekly, and monthly reports to your client...

mod_GeoIP on CentOS 7

Deploy and Configure Web Applications

Mod_GeoIP is an Apache module that can be used to get the geographic location of IP address of the visitor into the Apache web server. The module allows you to determine the visitor’s country and location. It is specially useful for Geo Ad Serving, Target Cont...

Install - Physical Media

Deploy and Configure XCP-ng / Citrix Hypervisor

XenServer installation overview. All hosts have at least one IP address associated with them. To configure a static IP address for the host (instead of using DHCP), have the static IP address and hostname on hand before beginning this procedure. To install t...

Upgrading Components

Deploy and Configure Citrix Virtual Apps and Desktops

Upgrade procedure Insert the installation media or mount the ISO drive for the new release. Double-click AutoSelect. To use the command-line interface, see Install using the command line. Install more than one core component is installed on the same server...

Upgrading the Site and Database

Deploy and Configure Citrix Virtual Apps and Desktops

Upgrade Steps After upgrading the core components and VDAs, use the newly upgraded Studio to initiate an automatic or manual database and Site upgrade. Remember: Check the Preparation section above for permission requirements. For an automatic database upg...

Upgrading Client VDA

Deploy and Configure Citrix Virtual Apps and Desktops

To upgrade VDAs installed on machines running Windows 8.x or Window 7 to Windows 10, Citrix recommends reimaging Windows 7 and Windows 8.x machines to Windows 10 and then installing the supported VDA for Windows 10. If reimaging is not an option, uninstall the...

Intro to Citrix

Deploy and Configure Citrix Virtual Apps and Desktops

  Lifecycle Current Releases will reach End of Maintenance 6 months after the release date. Current Release. Current Releases will reach End of Life 18 months after the release date. A Long Term Service Release will reach End of Life 5 years after the relea...

Azure to Ubiquiti IPSec

Command line Networking

  Connecting Azure to on-premises. After you've created your Azure Virtual Network Gateway log in to your router. set vpn ipsec auto-firewall-nat-exclude enable set vpn ipsec esp-group FOO0 lifetime 3600 set vpn ipsec esp-group FOO0 pfs disable set vpn...

Install - Network

Deploy and Configure XCP-ng / Citrix Hypervisor

Requirements The PXE server requires a Dynamic Host Configuration Protocol (DHCP) server to provide IP addresses to the PXE-booting systems, and either an NFS, FTP, or an HTTP server to house the installation files. Files can all co-exist on the same server, ...

Custom CentOS ISO

Command line Linux

There are many reason to create a custom installer. This example was created to add the console output to the 1st serial port to deploy CentOS on a headless device. This process works for CentOS 7 and 8/Stream. Before you begin, make sure you have genisoimage...

Postfix TLS

Command line Security(ish)

Configuring Postfix to use TLS on CentOS 7 1. Install all required packagesyum install cyrus-sasl cyrus-sasl-devel cyrus-sasl-gssapi cyrus-sasl-md5 cyrus-sasl-plain postfix 1b. Backup default postfix configcp /etc/postfix/main.cf /etc/postfix/main.cf_orig 2...

NFS on ZFS HA Cluster

Command line Linux

Build a high-available dual-controller storage array using open-source technologies.This solution should be capable of presenting shared storage to NFS client and can be expanded to iSCSI and FCoE. What is needed: 2 nodes with A LOT of memory. Fast storage...

Control Node Setup

Deploy and Configure Automation

A deployment controller could be a dedicated server or a workstation.   From command line Clone the Private Data System repository git clone https://github.com/clusterapps/PrivateSystem.git Review required settings. From Tower or AWX A:) Clone and modif...

Windows Managed Node Setup

Deploy and Configure Automation

Setup a Windows host - local UI Setting up a Windows Server to be managed by Ansible involves a few key steps. Ansible communicates with Windows servers over WinRM (Windows Remote Management), which is a Windows-native remote management protocol based on WS-Ma...

Export and Import Policies

Deploy and Configure Citrix Virtual Apps and Desktops

Exporting the Policy Complete the following procedure to export the policy: From the Desktop Delivery Controller as an Administrator role account. Open PowerShell : Add-PSSnapin Citrix* Export-BrokerDesktopPolicy | Out-File -FilePath "C:\Temp\Ci...

Generate SSL Certificates

Deploy and Configure XCP-ng / Citrix Hypervisor

Clear the “request was aborted:Could not create ssl/tls secure channel” error. Issue:The generated SSL cert on the pool master isn’t good enough for Windows 10. Fix:Make a new certificate. Modify the shell script /opt/xensource/libexec/generate_ssl_cert and...

Provisioning System

Other Things

After you have completed the deployment steps there will be a complete orchestration system available for your infrastructure. Overview