How to check the number of HBA cards or ports are available in my Linux setup ?
In my earlier article I had given a bunch of commands which can help a newbie understand dm multipathTutorial/Cheatsheet: Begineer's Guide to Understanding Device Mapper Multipath for LinuxMethod 1On a...
View ArticleHow to check the HBA name, make, model, firmware, driver version in Linux
In my earlier article I had given a bunch of commands to help understand dm multipathTutorial/Cheatsheet: Begineer's Guide to Understanding Device Mapper Multipath for LinuxNOTE: The commands to...
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The Six Best Screen Recording Apps for Linux and How to Install Them
Recording your screen can be a great way to demonstrate how to do something, especially if you are trying to introduce someone to Linux. After all, screenshots will only get you so far. Of course, you...
View ArticleHow to send log messages using rsyslog to remote server using tcp and udp...
In my last article I had shared the steps to redirect specific log messages to a different log file using rsyslogIn this article I will share the steps to forward the system log to remote server using...
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20+ scenario based interview questions with answers for beginners and...
This page consists a bunch of scenario based questions and their most possible answers, I have tried to answer to the best of my knowledge but if you feel there could be more possible answers or if you...
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What are the CPU c-states? How to check and monitor the CPU c-state usage in...
What are C-states, cstates, or C-modes?There are various power modes of the CPU which are determined on the basis of their current usage and are collectively called “C-states” or “C-modes.”The...
View ArticleHow to configure your BIND DNS server on a different port no other than 53 in...
By default DNS server works on port no. 53 but what if you want to change the default port no. in your machine.I wanted to give a try if it is possible and if yes then in that case how am I suppose to...
View ArticleHow to measure power consumption in watts using powerstat in Linux with examples
In my last article I had explained the various CPU c-states in detail and how you can disable the same, which you can access using below link.What are the CPU c-states? How to disable the C-states? How...
View ArticleHow to configure local customised repository for zypper based installation in...
Earlier I had written an article with detailed list of step by step guide to create autoyast.xml file for automated scratch installation of SLES 11 and SLES 12Step by Step Guide to create autoyast xml...
View ArticleHow to check and compare rpm version and release in Linux using bash script
In my last article I had shared some samples script examples to compare decimal values and floating numbers by converting them into integer which can work well for some scenarios but would not be the...
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How to check and update planned day light saving (DST) changes (timezone) in...
Daylight Saving Time happens in multiple countries across the globe and in many places the DST keeps changing every couple of years.IMPORTANT NOTE: If your system is configured with online NTP pool...
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How to set date and time in iLO3 / iLO4 using SNTP and RIBCL scripts from...
By default iLO is configured to use Date and Time information as set in the BIOS but that is not very reliable.I would have expected an iLO to connect with Onboard Administrator and get the time synced...
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Part 1: Step by Step Guide to Install Openstack using Packstack with Compute...
OpenStack project, which is also called a cloud operational system, consists of a number of different projects developing separate subsystems. Any OpenStack installation can include only a part of...
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Part 2: Configure Openstack OVSBridge, Network (Neutron), Public and Private...
In my last article I have already shared the steps to bring up a controller and compute setup and install openstack using packstack.Part 1: Step by Step Guide to Install Openstack with Packstack...
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Part 3: Create Glance Image, Cinder Volumes, Flavor Templates and key pairs...
In my last article I have already covered below topicsPart 1: Step by Step Guide to Install Openstack using Packstack with Compute and Controller node on RHEL 7Part 2: Configure Openstack OVSBridge,...
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Part 4: How to create, launch and connect to an instance from scratch in...
In my last article I have already covered below topicsPart 1: Step by Step Guide to Install Openstack using Packstack with Compute and Controller node on RHEL 7Part 2: Configure Openstack OVSBridge,...
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How to test ssh connection using bash script in Linux
There can be multiple scenarios due to which ssh connection may fail, some of them can benetwork issuespassword incorrectpassphrase incorrectand many more..so we will try to rule out all the possible...
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How to check the swap memory usage by a process in Linux
Earlier I had written an article on swappiness, here I will show you some of the methods which can be used to check the swap memory utilisation.Below article is tested and validated on Red Hat...
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How to configure offline yum repository using DVD and HTTP or Apache server...
In this article I will show you the steps to configure an offline yum repository in your network using http serverIMPORTANT NOTE: I had already written an aticle to use yum with apache but that was...
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How to lock or unlock a root and normal user account using pam_tally2 and...
To secure your server against unwanted attempts to login from third party it is always a good idea to implement login related hardening so that a user is denied login after certain amount of failed...
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