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Category: RHEL-CentOS

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…

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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…

 318 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…

 290 total views,  1 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…

 2,997 total views,  21 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…

 2,459 total views,  7 views today

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Red Hat Enterprise Linux 8 Beta major features and improvement

Posted on December 10, 2018 by Charanjit Cheema

Red Hat has launched the beta version of Red Hat Enterprise Linux 8 (RHEL 8) for users and developers for testing purpose and getting feedback from them. Red Hat Inc. which is developing RHEL 8 has announced this operating system beta version for public use on November 14, 2018. Four year ago when Red Hat…

 80 total views,  1 views today

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Segmentation Fault error in Linux / Unix system

Posted on December 6, 2018 by Charanjit Cheema

You were running a program installed in your Linux/Unix system and suddenly that program get stop and it log error in its logs memory segmentation fault error or you might executing a command in Linux / Unix server say you are working on LVM extension or VG scanning but you are unable to do so…

 248 total views

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Simple way to configure Ngnix High Availability Web Server with Pacemaker and Corosync on CentOS7

Posted on September 4, 2018 by Charanjit Cheema

Pacemaker is an open source cluster manager software which provide high availability of resources or services in CentOS 7 or RHEL 7 Linux. It has feature of scalable and advanced HA Cluster Manager. This HA cluster manager distributed by ClusterLabs. Corosync is the core of Pacemaker Cluster Manager as it is responsible for generating heartbeat…

 151 total views

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How to recover “rpmdb open failed” error in RHEL or Centos Linux

Posted on August 30, 2018 by Charanjit Cheema

You are updating the system through yum command and suddenly power goes down or what happen if yum process is accidentally killed. Post this situation when you tried to update the system again with yum command now you are getting below error message related to rpmdb: error: rpmdb: BDB0113 Thread/process 2196/139984719730496 failed: BDB1507 Thread died…

 2,799 total views,  19 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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