Today we suffered a Network Outage due to a power grid failure on a 500 KVa line that brings power from the hydroelectric dams in the central part of the country. This caused a power failure on Antel equipment that left the datacenter without connectivity for ~30 minutes on leading network equipment. Regarding the equipment:
I joined Sophilabs back in March, and since then, I’ve been trying to provide and offer my training, building my company infrastructure into making their support better. That being said, coworkers found entertaining the backbones on how the internet works, so I decided to dedicate a particular time the company provides for this topic and
THIS IS NOT RELATED TO THE OTHER SERVERS RUNNING IN Los Angeles and Secaucus. This is running at my house. Check the network diagram so you know what I’m talking about. Garage Data Center project. Through the years. So, the project’s whole point was to start the skeleton of the company I built after this.
Luks keys… and luks encrypted drives: Warning: Always backup the LUKS header before performing any maintenance on the hard drive!. How to backup the luks header:Drive: /dev/sdb [Example] Name: /tmp/mybackup [Example] Add a LUKS key: Deckey: Would be your passphrase key for decrypting your drive [first key when setting up the encrypted drive]. Slot: Luks
“VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature-rich, high-performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL) version 2.
Finding out information about plugged in devices in the motherboard without opening the machine. The following command should output something similar to this: Congratulations, you now know you only used two banks out of 3, and the system’s maximum allowed memory. PCI Devices: USB Devices:
KVM Nested virtualization. For my current project, I needed to perform nested virtualization on KVM using Ubuntu 12.04, and I encountered the VM would pause itself after showing the bios. That error dragged me to the logs where this line called my attention: And digging, I found out it’s a bug known issue with the 12.04 kernel.