Investigating a resize failure of a guest Windows virtual disk in a VirtualBox environment.
Bash: Unable to Scp or Rsync? Is Your Shell Clean?
Debugging a simple file transfer failure–a look at .bash_profile and .bashrc.
Installing Supernova on Debian 8.7
Supernova is a command-line Linux tool for managing multiple OpenStack Nova environments.
RHEL & CentOS 7: SELinux Enabled - Change SSH Default Port to a Custom Port
The following are helpful tools and commands to diagnose an SSH connectivity issue on a RHEL and/or CentOS 7 server with SELinux enabled.
Ubuntu: No Space Remaining on Boot Partition
The following is an outline of a process for handling initramfs build failures due to low free space on the /boot partition.
VirtualBox: Cloning Virtual Disk - Cannot Register the Hard Disk
After manually migrating several virtual machine disks (.vmdk) to a new pool of storage, the following warning surfaced.
Basic DNS Packet Capture & Analysis
Basic packet capture and analysis of DNS queries on a Linux operating system, using tcpdump, dumpcap, and tshark.
Vagrant on Windows: VirtualBox Network Configuration & Provisioning
This article explores Vagrant automation and VirtualBox networking (NAT/Bridging) configuration fundamentals on a Microsoft Windows operating system host.
OpenStack Keystone: MySQLdb Import Error
During the configuration of the Keystone identity service on an Ubuntu 14.04.2 LTS host, I observed a missing dependency which is not documented within the generic OpenStack Kilo documentation.
Ubuntu 14.04 LTS: Intel Xeon CPU Frequency Scaling
Following an installation of Ubuntu 14.04 LTS on a server using an Intel Xeon E3 chip, I observed that CPU performance was inconsistent with the reference specification.