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How to boot RHEL 7 / CentOS 7 to single user runlevel or rescue mode...
Starting from RHEL 7 the runlevel concept is no more and now the formerly known as runlevel 1 is called emergency.targetSo we will use the term "emergency.target" for "runlevel 1"There can be two...
View ArticleHow to create a sequence which start with 1 and next value will be 0 and then...
SQL> CREATE SEQUENCE TEST_SEQ_A START WITH 1 MINVALUE 0 MAXVALUE 1 INCREMENT BY -1 NOCACHE ORDER CYCLE ;SQL> Insert into...
View ArticleHow to create a user (normal and root) using kickstart configuration file in...
I have already written an article explaining the various syntax used in the kickstart file of Red Hat Enterprise Linux 7 with examples and sample kickstart configuration file.Understanding syntax used...
View ArticleHow to clean temporary files automatically using systemd-tmpfiles in RHEL 7 /...
Have you also come across a situation when your filesystem gets piled up with unwanted files and you have to step in manually clean up all the unwanted temporary files and directories.With Red Hat...
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How to check if Hyper Threading (HT) is enabled or disabled on my Linux server
In some online articles I have observed, tells that you can use below commands to validate the status of Hyper Threading# dmidecode | grep -i HTT HTT (Multi-threading) HTT...
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How to limit CPU count or disable CPUs in a multi core server in RHEL 7 /...
There are three different methods using which the number of CPU can be limited in Red Hat Enterprise Linux 7.Method 1: maxcpusUsing maxcpus parameter : Add kernel parameter maxcpus=N in...
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How to disable or enable hyper threading on my Linux server
Hyper threading uses processor resources more efficiently, enabling multiple threads to run on eachcore. As a performance feature, it also increases processor throughput, improving overall performance...
View ArticleHow to assign a service to a specific core using systemd in RHEL 7 / CentOS 7
If your service is a multithread service then it may run on multiple cores based on the availability of the threads and if the service runs on a single core than again it will run on different thread...
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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...
View Article10 examples to customize or change the login prompt using PS1 variable of...
After your Linux node boots up and once you enter your username and password, you are provided with a shell prompt which looks something like belowmy-linux-setup:~ #When executing interactively, bash...
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How to customize and change color of the bash login prompt in Linux
There are various method we can use to customize and change the colour of the login prompt of your bash shell in Linux.Follow below link to customize or change the view of the login prompt10 examples...
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Step by Step tutorial guide to configure BIND DNS server in chroot...
I have already written two articles to configure BIND DNS server in chroot environment for different BIND versions on Red Hat Enterprise Linux 6Step by step tutorial to configure BIND-9.8 DNS server in...
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How to change or customise login prompt for ksh shell in Linux (with examples)
In my last article I had shown the steps to customise login prompt for bash shellHow to customize and change color of the bash login prompt in Linux10 examples to customize or change the login prompt...
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Step by Step Guide to create autoyast xml file for SuSE Linux (SLES) with...
In this article I will show you some examples of autoyast xml files and syntax which can be used based on your requirement.AutoYast2 xml in SLES is similar to kickstart used with Red Hat only in terms...
View ArticleHow to configure NTP client to sync with NTP server during system startup...
While working on NTP server on my setup I realised that in Red Hat Enterprise Linux when we a service restart for NTPD or chronyd, the local time does not syncs with the NTP server immediately and it...
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How to configure Shared Uplink Set Network in HP Flex Virtual Connect using...
This article gives you CLI based commands and examples to configure your HPE Flex Virtual Connect from scratchOnce you have your Virtual Connect the first thing you have to do is connect all the...
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HP iLO4 command line interface (CLI) guide and cheatsheet with examples
With below article I will share some of the important commands which can be used to configure and manage HPE based integrated Lights Out Manager (iLO4)Assuming your iLO is only configured via OA and it...
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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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How to make bootable Pendrive (USB) to install Windows, Linux, VMware from an...
Below I am going to show how to make bootable perdrive with ISO.To Install Windows You can use the link http://www.softsea.com/download/ISO-to-USB.html to download ISO to USB software for windows ISO...
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Step by step tutorial guide with screenshots to Install and Configure VMware...
Download the ISO from VMware and write it to DVD or Pendrive in bootable mode.How to make bootable Pendrive (USB) to install Windows, Linux, VMware from an ISO NOTE: If the target blade has iLO...
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