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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….

 153 total views,  2 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…

 302 total views,  3 views today

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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…

 216 total views,  1 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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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,…

 410 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…

 272 total views,  2 views today

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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…

 2,755 total views,  38 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…

 2,335 total views,  16 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

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  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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