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Linux Sysadmins – Linux Guides, Nix Guides, Tutorials, Tips & Tricks.

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Cloud & Containerization

How to access Kubernetes Dashboard ( Web UI)

Posted on: April 24, 2020March 6, 2022

To get a rich graphical view of Kubernetes cluster, we need to deploy a few pods, replica, service and much more, Which allow to access Kubernetes dashboard.

Cloud & Containerization

How to Install a Kubernetes on CentOS 7

Posted on: April 18, 2020March 6, 2022

Kubernetes is a container orchestrator used to deploy container-based application upon the requirement for developers and system administrators.

Database Servers

How to install MariaDB in CentOS/RHEL 8 and Fedora

Posted on: April 11, 2020March 6, 2022

A simple guide about how to install MariaDB on Red Hat-based Linux distributions, In a few steps, We are good with spinning up an OpenSource DB server.

Troubleshooting

Recover from Starting Switch Root or corrupted Glibc

Posted on: April 1, 2020March 6, 2022

While starting the server it will not move forward after “Starting Switch Root”. Step by Step let’s see how to fix this issue.

Troubleshooting

Recover from chmod 777 permission on a root filesystem

Posted on: March 31, 2020March 6, 2022

How to Recover from accidentally running chmod -R 777 / on any RPM-based Linux Operating systems.

Linux Administration

Linux Sudo to run Privileged Commands

Posted on: March 29, 2020March 6, 2022

Allow normal users to run any privileged commands by escalating to Sudo, by configuring Linux Sudo on any Linux os normal users are allowed to get root access.

System Management

Register a Linux client with Foreman

Posted on: March 27, 2020March 6, 2022

How to subscribe a client with our content management server foreman/Katello/Satellite.

System Management

Install Foreman Katello Patch Management on CentOS 7

Posted on: March 25, 2020March 6, 2022

Foreman with katello patch management is a Content Management System provides a lot of features such as provisioning, Inventory, Patch management and much more.

Security

Install Wazuh Open Source Security Analytics

Posted on: March 17, 2020March 6, 2022

Install production-ready Wazuh OpenSource security analytics tool to monitor your critical production environment.

Identity Server

Setup a FreeIPA or IDM Replica

Posted on: March 1, 2020March 6, 2022

IDM replica is the same copy of the existing master IDM server. The use of a replica is to have multiple copies of master and it can be used in different geographical location.

Posts pagination

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  1. Gerald on Single Node OKD (OpenShift) Setup: A Fast and Easy GuideDecember 15, 2024

    Hi, in the 'Starting with Bootstrapping' step I have this error: DEBUG Still waiting for the Kubernetes API: Get "https://api.xxx.local:6443/version":…

  2. jos on How to Configure Sudo email alertMarch 4, 2022

    Hi! Some way to send commands write as root by email? Thanks!

  3. paul on Monitoring Proxmox with InfluxDB and Grafana in 4 Easy stepsMarch 1, 2022

    Tried 12966 per your example, got error "failed to import dashboard."

  4. Anonymous on Migrate existing Iptables to Nftables in RHEL8/CentOSFebruary 27, 2022

    I followed the procedures and successfully loaded some weird 8081 port configurations needed for the app, however I discovered it…

  5. sy on Install Ansible AWX on Kubernetes in 5 minutesFebruary 17, 2022

    tried many times - followed all steps but was unable to setup custom context I always get -> The connection…

Ansible (11) Apache (5) Docker (7) foreman (5) IDM Server (7) Kubernetes (14) linux commands (5) Linux networking (10) Linux Security (5) Logical Volume Management (13) OpenShift (8) Oracle Database (5) Solaris 11 (4) Solaris OS (6) VMware (5)

  • OKD Cluster (OpenShift) Installation on Bare Metal
  • Configuring HAProxy LB for OKD HA Cluster
  • Configuring DHCP Server for OKD HA Clusters
  • Configuring BIND DNS Server for OKD HA Clusters
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