Variables or Vars are used to store the data which is further used by ansible playbook. These variables can either take input from user or it can also be stored in YAML or INI file as well like main.yml or inventory. Variables stored in either playbook or in separate YAML or INI format file can…
How to mitigate Linux OpenSSH vulnerability CVE-2023-38408
The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an incomplete fix for CVE-2016-10009. Source Definition: CVE-2023-38408 at…
How to optimize the performance of Ansible Automation Platform or Ansible Tower
Red Hat Ansible Automation Platform (AAP) or Ansible Tower has become de facto Automation Tool for deploying the Automation projects to automate the System Administration tasks such as configuration management, application deployment, provisioning, orchestration, and continuous delivery. Although AAP and Ansible Tower are designed to run on large scale Infrastructure environment but sometime running complex…
How to fix code and text file linting errors with the help of Visual Studio Code
Developers often face issues while writing their codes for Linux and Unix OSs from their Windows laptop. Most problems occurs when developers codes those programs or scripts which use indentation like Python and Ansible as these languages follow strict indentation rules and may create errors with incorrect indentation while running the codes or during lint…
How to migrate existing WordPress blog from AWS EC2 instance to Amazon Lightsail
In my previous post I had written on how to convert AWS EC2 On Demand (OD) instance to Reserve Instance (RI) for running dedicated and heavy traffic based website like blog or any ecommerce website which require high configuration, but if your website does not have much traffic or you do not want high compute…
What are Huge Pages and how to configure it in Linux for supporting Oracle SGA requirement
Huge Pages In x86 Architecture, memory pages are like textbook pages where CPU use those pages for reading and writing them in virtual memory for addressing computing requirement. Technically, I can say it is a fixed size block of virtual memory which is defined as pages that has corresponding entry in page table and further…
Enabling and Troubleshooting Hot Add Feature in Linux VMs
As a Linux System Admin, we have come across such requirement multiple times for Vertical scaling of Linux VMs in VMware infrastructure. Vertical scaling means adding of additional resources like CPU, memory, Storage to server or VM for increasing its capacity to address more load of Application or DB hosted on Linux VM but what…
How to manage the Apache logs with the help of Linux logrotation utility
Maintaining logs in busy Apache server is a very painful as frequent access of Apache webservice from clients can generate large size of logs example access_log and error_log which can consume the filesystem space but we should not stop generating these logs also as these logs are very helpful in troubleshooting the apache related issues…
How to Fix High Swap Usage in SAP HANA Server Using SAPCONF5
In this post I will guide you how to upgrade and manage SAPCONF5 tool and also, how to address High Swapping issue in Suse Linux Enterprise Server for SAP Application 12 (SLES for SAP Application 12) based SAP HANA server with the help of SAPCONF5 tool SAPCONF5 tool is an upgraded version of SAPCONF4 tool….
RHEL 7 / CentOS 7 boot problem after P2V by using VMware converter
This issue is known issue with VMware converter 6.2.0 tool after P2V of either RHEL7 or CentOS7 Linux VM unable to boot and start throwing below error message in VM console Reason is P2V conversion put invalid character in grub configuration file along with command “: # (removed by Converter)” in front of grub parameters…