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Author: Charanjit Cheema

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

How to manage the Apache logs with the help of Linux logrotation utility

Posted on September 18, 2022February 13, 2023 by Charanjit Cheema

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…

 221 total views,  3 views today

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SAPCONF5: Upgrading managing and addressing high swapping issue in SAP HANA server

Posted on August 15, 2022 by Charanjit Cheema

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….

 152 total views,  1 views today

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RHEL 7 / CentOS 7 boot problem after P2V by using VMware converter

Posted on August 14, 2022 by Charanjit Cheema

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…

 301 total views,  2 views today

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How to upgrade Ubuntu 18.04 LTS to Ubuntu 20.04 LTS

Posted on May 18, 2020 by Charanjit Cheema

Ubuntu 20.04 LTS has released on April 23, 2020 (with code name “Focal Fossa”) by succeeding its Ubuntu 19.10 as a Latest Stable Linux OS. As Ubuntu 20.04 LTS has suffix “LTS” that’s means it has Long Term Support for 5 years from Ubuntu. Ubuntu 20.04 LTS has come with many features some key features…

 191 total views,  3 views today

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Linux kernel 5.5 released with new security and hardware support

Posted on February 3, 2020 by Charanjit Cheema

Linux kernel is a core of Linux Operating system (OS) it work as interface between hardware and processes for OS. Linux kernel was first developed by Linus Torvalds in 1991 since now many kernel have been released. This year Linus Torvalds has announced in his mailing list(LKML) about the released of new stable Linux kernel…

 193 total views,  3 views today

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Understanding of Linux Inodes

Posted on November 15, 2019 by Charanjit Cheema

Introduction to Inode File descriptors, file table and inode table in Linux. Image Source: Wikipedia An inode is a data structure on a filesystem on Linux and other Unix-likeoperating systems that stores all the information about a file except its name and its actual data. Inode is created during creation of file along with file…

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How to recover or rebuild initramfs in CentOS 7 Linux

Posted on June 17, 2019 by Charanjit Cheema

Corruption of initramfs can be occur by many ways for example after patching CentOS 7 Linux OS or installing a buggy device driver in server you found CentOS 7 Linux server has become unbootable. You may also encouter below kernel panic error because server initramfs got damaged . CentOS 7 Linux Kernel Panic screen Now…

 2,747 total views,  30 views today

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How to Set password policy in CentOS or RHEL system

Posted on May 27, 2019 by Charanjit Cheema

Linux is known for one of most secure Unix Operating System (OS) in world. But that is not mean it is 100% secure there is say in Information Technology (IT) no technology is a completely secure that is why from a System Administrator to CIO they take measure for securing IT infrastructure on regular basis…

 2,334 total views,  15 views today

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How to use Amazon Cloudwatch to monitor my AWS EC2 resources

Posted on March 14, 2019 by Charanjit Cheema

Amazon CloudWatch is a monitoring service which monitor AWS resources on Cloud. It comes with dozen of monitoring metrics which ease Cloud Admin to use them in monitoring their AWS Infrastructure services resources like Amazon EC2 instances, Amazon S3 Cloud Storage, Amazon RDS (Relational Database Service) on Cloud etc. It collects monitoring and operational data…

 100 total views,  2 views today

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How to convert Amazon EC2 On Demand instance to Amazon EC2 Reserve Instance

Posted on February 27, 2019 by Charanjit Cheema

I was using t2 micro instance for my WordPress website for one year on trial basis as most of you might know AWS provide 750 hours/month free tier usage of its t2 micro instance for a year. But as year passed my instance usage reached high and its trial usage also reached to finish. Due…

 253 total views,  1 views today

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Recent Posts

  • How to manage the Apache logs with the help of Linux logrotation utility
  • SAPCONF5: Upgrading managing and addressing high swapping issue in SAP HANA server
  • RHEL 7 / CentOS 7 boot problem after P2V by using VMware converter
  • How to tune SLES 12 for SAP Application SP3 for optimizing SAP HANA system performance
  • How to upgrade Ubuntu 18.04 LTS to Ubuntu 20.04 LTS

Recent Comments

  1. toets on How to Set password policy in CentOS or RHEL system
  2. Kamal Kumar Sharma on How to recover or rebuild initramfs in CentOS 7 Linux
  3. Firoz Akhter on SAPCONF5: Upgrading managing and addressing high swapping issue in SAP HANA server
  4. Shameek Bhattacharya on How to Set password policy in CentOS or RHEL system
  5. Charanjit Cheema on How to recover “rpmdb open failed” error in RHEL or Centos Linux

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