How to limit CPU count or disable CPUs in a multi core server in RHEL 7 / CentOS 7
There are three different methods using which the number of CPU can be limited in Red Hat Enterprise Linux 7.
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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
How to clean temporary files automatically using systemd-tmpfiles in RHEL 7 / CentOS 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
How to create a user (normal and root) using kickstart configuration file in RHEL 7 / CentOS 7
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
How to create a sequence which start with 1 and next value will be 0 and then next value is 1 and then 0 .. and so on ... is this possible ?
SQL> CREATE SEQUENCE TEST_SEQ_A START WITH 1 MINVALUE 0 MAXVALUE 1 INCREMENT BY -1 NOCACHE ORDER CYCLE ; SQL> Insert into test(seq) values(TEST_SEQ_A.nextval); SQL> Select \*from test; **Output:** 1 0
How to boot RHEL 7 / CentOS 7 to single user runlevel or rescue mode (emergency.target)?
Starting from RHEL 7 the runlevel concept is no more and now the formerly known as runlevel 1 is called emergency.target So we will use the term "**emergency.target**" for
Tutorial / Cheatsheet:12 practical examples for different sudo access based scenarios in RHEL 7 / CentOS 7
Below are some of the scenarios I can think of where sudoers file can be used, if you have any more [](How2Bto2Buse2Biperf32Btool2Bto2Bmonitor2Bnetwork2Bbandwidth2Bin2BLinux2B252822529.webp) questions for which you want any help of
Understanding syntax, arguments, aliases used in sudoers file with examples (visudo)
This article contains overview on the various syntax and aliases which are used in sudoers file [](How2Bto2Buse2Biperf32Btool2Bto2Bmonitor2Bnetwork2Bbandwidth2Bin2BLinux.webp) **IMPORTANT POINT:** It is strongly recommended to use "**visudo**" to edit the sudoers
Tutorial / Cheatsheet: 11 examples to use systemctl to manage unit files and service in RHEL 7 / CentOS 7
In my last article I have given an [**overview of systemd**] with examples. If you want to have a background of migration from sysvinit scripts which we were using RHEL
Step by Step Linux boot process with GRUB2 and systemd in RHEL 7 / CentOS 7
Below table depicts the flow of the boot up process for [RHEL 7 / Cent OS 7]({{< relref "step-by-step-red-hat-linux-70/index.md" >}}) with GRUB2 and systemd [](RHEL7_Boot_Process2B252822529.webp) The stages involved in Linux Booting Process are: