Author: Charanjit Singh

Charanjit is working as a Linux Subject Matter Expert in Kyndryl, he has 16 Years of professional experience in IT Infrastructure Projects implementation and support service delivery. Rich work experience in Data Centers and MSCs (Mobile Switching Centers). He possesses good knowledge in Linux, VMware, AWS, and Openstack Cloud. He is a lazy System Administrator who likes to Automate his task through Shell scripts and Ansible playbooks. He has contributed his many Automations work in Kyndryl and also maintain his own internal company Github repo. His hobby is researching on new technologies and sharing this through his blog but if he is not researching or writing blog then you will find him listening music while sipping cup of coffee and enjoying the nature view. You can find him on Twitter, Facebook, Linkedin or send him an email at webmaster@cjcheema.com

What are Ansible Host and Group Variables

Posted on August 28, 2023September 7, 2023 by Charanjit Singh

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

Posted on July 28, 2023August 1, 2023 by Charanjit Singh

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 tune SLES 12 for SAP Application SP3 for optimizing SAP HANA system performance

Posted on July 12, 2020 by Charanjit Singh

I am working as a Linux Administrator and supporting customer environment which have SAP BW Application and HANA DB services hosted on SUSE Linux Enterprise Server (SLES) 12 for SAP Application SP3. One day I got a request from my customer SAP application team to tune the OS that is SLES 12 for SAP Application…

How to disable Transparent Huge Pages in Linux

Posted on May 11, 2020 by Charanjit Singh

Transparent Huge Pages (THP) is a feature available in mostly Linux distributions or distro which optimizes large memory of the systems as now days systems (computer systems) are coming with large memory. THP can enhance system performance by mapping memory with large physical pages this can be useful in case system is computing multiple processes,…