REDAIX - Unix(Red Hat & IBM AIX) | Cloud & DevOps

Stratis is a local storage management solution for Linux Operating System and aims to ease the work of a system administrator by advanced storage options like  snapshots, thin provisioning, pool-based management, monitoring, Tiering , etc. apart from being very simple to use. Stratis is a user-space daemon that configures and monitors existing components from Linux’s device-mapper subsystem, as well as the XFS filesystem. Stratis Pool which is the central attraction of the Stratis tool is a collection of one or more local disks or partitions. Once the pool is created, administrators can create volumes.

Red Hat Enterprise Linux 8 includes the Virtual Data Optimizer (VDO) driver, which optimizes the data footprint on block devices. VDO is a Linux device mapper driver that reduces disk space usage on block devices, and minimizes the replication of data, saving disk space and even increasing data throughput. VDO consists of two kernel modules and two commands: Kernel Modules: kvdo  – This module to transparently control data compression. uds – This module for deduplication. Commands:    vdo - This command is used to create, remove, start, and stop VDO volumes, as well as performing other configuration changes. vdostats  -This command is used to report on various aspects of VDO volumes, including effective reduction and physical volume utilization. Think of this as ‘df’ for VDO capacity.

It’s not recommended to use telnet as it is not secure. The passwords are transferred using a plain text and any packet sniffer can easily track you. Nevertheless, it’s sometimes required to install telnet anyways. To check if you have telnet package already installed on your system, use : # rpm -qa | grep telnet telnet-server-0.17-59.el7.x86_64 telnet-0.17-59.el7.x86_64 In order to turn Telnet on make sure that you have the packages telnet-server and telnet installed: Installing telnet packages If the 2 required packages are not installed, install it using yum. # yum install telnet-server telnet

Ansible Tower Installation WHY RED HAT ANSIBLE TOWER? Ansible Tower is a web-based UI that provides an enterprise solution for IT automation. It has a user-friendly dashboard complements Ansible, adding automation, visual management, and monitoring capabilities. provides user access control to administrators. graphically manages or synchronizes inventories with a wide variety of sources. a RESTful API And much more…​ ANSIBLE TOWER TYPES OF MODE Depending on the needs of the enterprise, Ansible Tower can be implemented using one of the following architectures. Single Machine with Integrated Database All Ansible Tower components, the web front-end, RESTful API back end, and PostgreSQL database resides on a single machine. This is the standard architecture.

Install Ubuntu 20.04 LTS Desktop On Thursday, April 23rd, 2020, Canonical Ltd, the makers of Ubuntu Linux distribution officially released the long-awaited Ubuntu 20.04 version code-named “Focal Fossa”, it is an LTS (Long Term Support) version based on Linux kernel series 5.4, for which maintenance updates will be provided for 5 years until April 2025 and it will reach end-of-life in 2030. New Features in the Desktop Edition The new desktop features include a new graphical bootsplash (integrates with the system BIOS logo), refreshed Yaru theme, GNOME 3.36 , Mesa 20.0 OpenGL stack , BlueZ 5.53, PulseAudio 14.0 (prerelease), Firefox 75.0, Thunderbird 68.7.0, and LibreOffice 6.4. Concerning network configuration, netplan comes with many added features.