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Author: Grzegorz Juszczak

How to replace a Volume in mdadm software RAID array

May 4, 2022June 9, 2022 No Comments

mdadm, which is a Linux Software RAID, is not inferior to a typical hardware RAID controller, and just like a hardware controller – enables us to swap physical disks inside the RAID array. It requires executing some commands indeed, but […]

Grzegorz Juszczak Linux, Storage

Debian Installation with LVM RAID 1 and Hot Spare

January 28, 2022February 19, 2022 6 Comments

Debian is a powerful, multipurpose, and super stable Linux distro, however, in my humble opinion, its installation wizard was never a strong point of this Linux distribution, making it pretty difficult to install for beginners. While the standard setup with […]

Grzegorz Juszczak Linux, Storage

CinderCloud.com – cloud hosting from TuxFixer’s creator

December 12, 2021December 12, 2021 No Comments

My new cloud hosting project – CinderCloud.com went LIVE!!! We offer cloud hosting services like VPS servers (including my Kali Linux qcow2 image) and Public Cloud accounts in redundant, fault-tolerant OpenStack infrastructure with distributed CEPH storage. Here you can find […]

Grzegorz Juszczak Linux

Comment uncomment and replace characters in multiple lines in Vim

November 27, 2021November 28, 2021 No Comments

Modifying files in Vim can be arduous and time-consuming, especially when we want to modify multiple lines at once. The typical use case is modifying a configuration file in the system when it is required to comment or uncomment multiple […]

Grzegorz Juszczak Bash, Linux

Resize Cinder based Volume attached to an Instance in OpenStack

July 10, 2021July 14, 2021 No Comments

One of the key features in OpenStack is the ability to resize Instance’s flavor to increase resource limits used by Instances, such as vCPUs and RAM. Unfortunately, in the case of Instance with Cinder-backed volume, changing flavor does not affect […]

Grzegorz Juszczak Cloud Computing, Linux, Storage

How To Enable LLDP Service on CentOS

May 22, 2021May 22, 2021 No Comments

LLDP (Link Layer Discovery Protocol) can be essential in the situations of complex network-server infrastructure configurations and it’s extremely helpful in case there is no direct access to our setup but we need to determine what network ports on the […]

Grzegorz Juszczak Linux

How to add Hot Spare Volume to the existing mdadm software RAID array

December 29, 2020December 29, 2020 No Comments

Having a Hot Spare significantly increases the security of our data in a RAID array. In the case of a single disk failure, a Hot Spare jumps in the place of a faulty drive. Working as a temporary replacement, a […]

Grzegorz Juszczak Linux, Storage

Configure VLAN tagged interface over LACP bond on CentOS / RHEL

November 12, 2020December 29, 2020 No Comments

In one of my previous articles I presented how to: Configure a bridge interface over a VLAN tagged bonded interface on CentOS / RHEL This is a supplement to the above tutorial – sometimes all you need is to configure […]

Grzegorz Juszczak Linux

Configure a bridge interface over a VLAN tagged bonded interface on CentOS / RHEL

June 1, 2020November 29, 2020 No Comments

Linux enables us to create advanced network setups which provide us with special features like NIC Bonding, VLAN tagging or Bridging allowing us to increase network connectivity efficiency and reliability of Linux based hosts. Linux Bond is a kernel module […]

Grzegorz Juszczak Linux

Install and Configure Checkmk on CentOS 8 and Monitor Linux Hosts using Checkmk agent

January 18, 2020January 19, 2020 1 Comment

If you have important production servers or critical services in your network, having monitoring tools becomes a must. In case of any hardware or software failures, it is crucial to get alerted as soon as possible and take appropriate actions […]

Grzegorz Juszczak Bash, Linux

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