How to install Kubuntu 21.10
Posted: 2021-11-03 17:38:44 Source: https://www.youtube.com/watch?v=XgMymW29Nus
What are date and time types and functions in SQLite
Posted: 2021-11-03 16:37:03 Source: https://linuxhint.com/date-time-types-functions-sqlite/
SQLite, like other databases, provides a variety of built-in functions which make it easy to use for different applications. It supports different data types and functions of Date and Time which can help to manage date and time in databases. This article explains date and time data types and functions in SQLite. A brief explanation of date and time functions such as datetime(), julianday(), strftime() are also discussed with examples in this post.
Want to Upgrade RHEL 8.3? Here's the Best Way to Upgrade to RHEL 8.4
Posted: 2021-11-03 16:00:00 Source: https://www.linuxjournal.com/content/want-upgrade-rhel-83-heres-best-way-upgrade-rhel-84
Red Hat Enterprise Linux (shortened to RHEL) 8.4 is now available for the Linux customers. RHEL 8.4 has various updates and enhancements for developers, designers, and production teams. So now you can download the latest version from Red Hat’s official site.
But before downloading RHEL 8.4 you might want to have a sneak peek at all the new features offered by this model. This article will explain that and then will take you through the upgrade procedure using the dnf command-line option.
About RHEL 8.4
RHEL 8.4 offers a definitive guide from development to deployment. It helps teams collaborate within a single open platform that includes tools and analytics required for building and managing these systems. The latest tools, advanced container capabilities, and programming languages included in RHEL 8.4 allow the developers to perform any task with a new set of codes faster.
New software updates available in RHEL 8.4 are Redis 6, Python 3.9, MariaDB 10.5, PostgreSQL 13, LLVM/Clang, GCC 10, Go 1.15, and Rust 1.49.
When it comes to hardware support, Intel Tiger Lake GPUs are supported now by RHEL. These GPUs come with Intel Xe and Intel UHD graphics.
How to Upgrade RHEL 8.3 to RHEL 8.4
Before starting the significant RHEL version upgrade, keep verified RHEL 8.x backups.
At first, login as a root user by typing:
ssh ec2-user@rhel-8-ec2-box
Then, note the current kernel with the help of following commands.
$ uname -a $ uname -r $ cat /etc/os-release
You can use Ansible to upgrade or update RHEL running at Google Cloud or AWS. Another way is to use updated images to get rid of earlier instances. Now let's follow the commands given below in a step-by-step guide to upgrade RHEL 8.3.
#1: Take Backups
Always take a backup before updating your current distro because if you don’t you’ll lose all your data and important files saved in the computer. And you must use bash or any modern shell while executing the actions given in this article.
#2: Check for Updates
To check for updates type the following command.
$ sudo dnf check-update
#3: Upgrading RHEL 8.3 to 8.4
To apply or install updates, type the following Linux command.
Proxmox VE Full Course: Class 15 - Clustering
Posted: 2021-11-03 15:00:13 Source: https://www.youtube.com/watch?v=QWyLilz1RqU
Copying and Pasting in Emacs
Posted: 2021-11-03 14:56:26 Source: https://linuxhint.com/copying-and-pasting-in-emacs/
This article provides an easy step-by-step guide on how to copy and paste in Emacs. This helpful tutorial highlights the Emacs terminology and the process of copying and pasting using Emacs. In addition, the useful and effective shortcuts on the keyboard were provided to facilitate smooth copying and pasting commands.
Development Release: Red Hat Enterprise Linux 9 Beta
Posted: 2021-11-03 14:49:05 Source: https://distrowatch.com/11390
Red Hat has announced the availability of a new development release, Red Hat Enterprise Linux 9 Beta. The new development release is built from CentOS Stream. It finishes the migration from Python 2 to Python 3. The new beta also offers smaller binaries due to link time optimization.....
What are SQLite foreign keys
Posted: 2021-11-03 13:25:20 Source: https://linuxhint.com/sqlite-foreign-keys/
Foreign keys in SQLite are the values in a table that indicate the primary key of another table. The tables used in databases can have relationships with each other, to establish this relationship, foreign keys are used. This article explains what are foreign keys and how to use them in SQLite. How to check the status of foreign keys, how to enable them and actions used with foreign keys are briefly discussed with examples in this guide.
Linux Foundation Adds Software Supply Chain Security To LFX
Posted: 2021-11-03 13:00:00 Source: https://it.slashdot.org/story/21/11/03/0324201/linux-foundation-adds-software-supply-chain-security-to-lfx?utm_source=atom1.0mainlinkanon&utm_medium=feed
An anonymous reader quotes a report from ZDNet: LFX supports projects and empowers open source teams by enabling them to write better, more secure code, drive engagement, and grow sustainable software ecosystems," the Linux Foundation says. Now, to address the growing threat of software supply chain attacks, the foundation is upgrading its LFX Security module to deal with these attacks. Jim Zemlin, the Linux Foundation's executive director, announced this new tooling today at the Linux Foundation Membership Summit. Enhanced and free to use, LFX Security makes it easier for open source projects to secure their code. Specifically, the LFX Security module now includes automatic scanning for secrets-in-code and non-inclusive language, adding to its existing automated vulnerability detection capabilities. Software security firm BluBracket is contributing this functionality to the LFX as part of its mission to make software safer and more secure. This functionality builds on contributions from open source developer security company Snyk, helping make LFX the leading vulnerability detection platform for the open source community. [...] LFX Security will be further scaled out in 2022, helping to solve challenges for hundreds of thousands of critical open source projects under the Open Source Security Foundation. LFX Security is free and available now.
Read more of this story at Slashdot.
What is JavaScript? – Beginners Guide
Posted: 2021-11-03 12:14:56 Source: https://linuxhint.com/javascript-beginners-guide/
JavaScript is the most popular scripting language that works on the client-side to handle the interactivity of your web page JavaScript has become nothing less than essential for interactive, and dynamic web pages. There is a whole bunch of stuff that JavaScript can do, we’ll learn it in this article along with how it works and some beginners friendly basic concepts.
What is insertOne method in MongoDB
Posted: 2021-11-03 12:08:30 Source: https://linuxhint.com/insertone-method-mongodb/
MongoDB is a widely used open source and a NoSQL database management system that supports several methods and functions. The insertOne() method is one of them and is used to insert documents in a collection of MongoDB. This article explains what insertOne() method is and how to use it in MongoDB. Various examples such as using insertOne() method to create collections, inserting and handling unique ids are also mentioned in this guide.
How to use UPDATE statement in SQLite
Posted: 2021-11-03 12:06:25 Source: https://linuxhint.com/update-statement-sqlite/
The UPDATE statement allows users to make modifications in the data of already existing tables in SQLite. The UPDATE statement in SQLite is used to modify the values of one or more columns of an existing row, in a table. This article explains what UPDATE statement is, its syntax, how to select data and modify it using UPDATE statement. Modifying multiple columns and multiple rows using SQLite UPDATE statement is also discussed in this tutorial.
What is the “in” operator in Javascript?
Posted: 2021-11-03 12:05:44 Source: https://linuxhint.com/in-operator-javascript/
JavaScript's “in” operator is used to check if a particular property exists in an object or not. The ‘’in’’ operator responds with a boolean value which means that it returns true if the value exists in the object and false if that particular value is not present. In this article, we have seen the working of an operator on both the objects and arrays and discussed some of its examples in detail.
What is datediff in MySQL
Posted: 2021-11-03 11:57:11 Source: https://linuxhint.com/datediff-mysql/
MySQL is one of the most popular databases in the world. Regardless of the industry, MySQL is widely adopted for its features. It’s an open-source RDBMS. Data are organized into tables that can be related to each other. It incorporates SQL to perform various database actions. What is datediff in MySQL is explained in this article.
Top MongoDB Interview Questions in 2021
Posted: 2021-11-03 11:33:13 Source: https://linuxhint.com/mongodb-interview-questions-2021/
MongoDB is a popular non-relational database management system. Many organizations are using MongoDB for load-balancing, indexing, ad-hoc queries, and server-side JavaScript execution. Because of its growing popularity and high performance, there are a lot of job opportunities for the developers who are working with MongoDB. This article lists the top 20 MongoDB interview questions that can assist in preparation for a MongoDB interview. Answers are explained with examples and illustrations. The questions are divided into basic, intermediate and expert levels for convenience and better preparation of the interview.
What is Aggregation in MongoDB with example
Posted: 2021-11-03 09:25:19 Source: https://linuxhint.com/aggregation-in-mongodb/
Database Management Systems have some common operations that are supported by SQL and NoSQL databases as well; the aggregation operation is one of them. The aggregation operations consist of several expressions that help to group the data for a meaningful output. This article explains what aggregate function is and how to use it in MongoDB. All the operators related to the aggregate function such as $sum, $max, $min and $avg are also discussed in the tutorial.
What is a Map Object in JavaScript?
Posted: 2021-11-03 08:54:41 Source: https://linuxhint.com/map-object-in-javascript/
Map object like an ordinary object is a collection of elements that stores key-value pairs; however, the main difference is that the keys can be of any type. It should also be noted that the map object remembers the order of the key-value pair that was inserted in the map object. In this post, we saw a map object in JavaScript and discussed two examples. Apart from that, we also looked at different methods and properties of map objects in JavaScript.
What is a Functor in C++?
Posted: 2021-11-03 08:41:58 Source: https://linuxhint.com/functor-c/
The functor is quite like a class that behaves like a function or method. The functors are those objects that can be used as functions or likewise. These are helpful when a user wants to pass more than 1 argument in a function while that function doesn’t allow it. What is a Functor in C++ is discussed in this article.
What is a Const Pointer in C++?
Posted: 2021-11-03 08:33:23 Source: https://linuxhint.com/const-pointer-c/
The pointer in programming refers to a variable that is pointing towards some specific address. The word “const” means “no change” to any variable value within the programming languages. What is a Const Pointer in C++ is explained in this article.
What are Nested Loops in C++ with Examples?
Posted: 2021-11-03 07:15:02 Source: https://linuxhint.com/nested-loops-c/
A loop is a construct that executes statements repeatedly until a specified condition is met. When one loop is nested into another, these three features must be considered for each of the corresponding loops. In C++, if there is only one statement to be repeated, then there will be no block. Nested Loops in C++ are discussed in this article.
What is the yield* keyword/expression in JavaScript?
Posted: 2021-11-03 06:38:45 Source: https://linuxhint.com/yield-keyword-in-javascript/
Yield is a keyword/expression that is used to halt the implementation of the generator function. A generator function is similar to other functions, but they are different in such a way that the value returned in the generator function is the yield keyword. If the yield expression is being paused, then it will pause the generator function too. This article explains the usage of yield* expression/keyword in JavaScript with examples.