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The system call is a mechanism in Linux that allows user-space applications to connect with the kernel, which is also a component of what makes up the operating system’s core. A user-space application needs to send a system call to the kernel that is used to have a privileged functioning performed on its behalf, including writing or reading information to a file or beginning a new process. In this article, we will be discussing the Linux System Call in detail along with its various types.How Linux System Calls Work?
The system calls are carried out in the kernel as performs that consumer-space applications can access through the C library’s standard library functions. Among them are open(), read(), write(), close(), fork(), exec(), and numerous other functions.
In most cases, a user-space application puts together a set of disputes, such as the URL of a file to be opened, and moves them to the suitable typical library perform to make a system call. The library operates and then organizes all of the arguments in order that they can be enacted to the kernel, generally by replicating them into the system called table, a special buffering in memory.
The library function calls a trap when its parameters are in the system call table, and this moves the command from user space to the kernel. The kernel then executes the action requested using the system call table arguments and converts the outcome to the user-space utilization via the framework call’s exchange value.
System calls are essential components of the operating system Linux because they enable user-space programs to perform privileged activities in a controlled and safe manner. It also provides an established interface for gaining access to kernel performance, which aids utilization along with system compatibility and seamless integration.Types of System Calls in Linux
System calls in Linux are classified into five types based on the operation they perform. These are the categories −
Process management system calls − These system calls are used to manage processes, such as starting new ones, stopping existing ones, and waiting for them to finish. Fork(), exec(), wait(), and exit() are all examples of process management system calls ().
fork() − This system call duplicates the calling process to create a new process. The child process is the new process that runs the same program as the parent process.
wait() − A parent process uses this system call to wait for its child process to terminate. The parent process is halted until the child process completes.
exit() − The present-day process is terminated and a status code is returned to the originating process.
File management system calls − These calls to the system are used to open, read, write, and close documents, as well as to create, rename, and delete them. Some file management system calls () are open(), read(), write(), close(), mkdir(), and rmdir().
open() − broadens a file and goes back to a file descriptor (an integer identifying the open file.
read() − The above system call examines data from an open file into a memory buffer.
write() − It is an internal call that is used to write information stored in a buffer of memory to an open file.
close() − It is a system call for closing a file determined by its file descriptive term.
Device management system calls − These system calls are used to manage I/O devices, such as reading from and writing to them, setting device attributes, and controlling device operations. System calls for device management include read(), write(), ioctl(), and select ().
write() − It is a system call that is used to write data from a memory buffer to an output device.
ioctl() − This system call controls the behavior of a device by setting or retrieving device attributes.
select() − This system call is used to wait for I/O operations to complete on multiple devices.
Network management system calls − These system calls are used to manage network resources such as connecting and disconnecting from networks, sending and receiving data over networks, and resolving network addresses. Socket(), connect(), send(), and recv() are examples of network management system calls ().
socket() − It establishes a socket, and this is a network of things endpoint which can be used to communicate.
connect() − It is an internal call used to establish a connection to an external network endpoint.
send() − It is an application call used to transfer data across a computer’s connection.
recv() − A network connection is used to send data to this system call.
System information system calls − Such system calls are utilized to query and change system parameters such as time, configuration, and performance statistics. System information system calls () include getpid(), getuid(), gethostname(), and sysinfo().
getpid() − The program ID of the process that is currently running is returned by this system call.
getuid() − The system call in question is used to get the user ID of the current process.
gethostname() − This call to the system is used to get the hostname of the system.
sysinfo() − The above system call returns information about the system, such as the amount of memory free and the overall amount of processes.Conclusion
System calls are a vital component in Linux and other systems of operation that allow consumer-space programs to make use of kernel functionality via a standardized interface. System calls are classified into five categories based on the type of operation they perform: process management, file management, device management, network management, and system information. A single system call group contains a set of operations that allow consumer-space applications to execute particular kinds of operations on the operating system that is underneath. System calls contribute to application and operating system compatibility and interoperability by offering a defined interface for accessing the kernel that is used functionality.
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Introduction to Imagemagick version
Web development, programming languages, Software testing & othersVersions of Imagemagick
Imagemagick was created in 1987 by John Cristy, where initially, it was used to convert 24-bit images to 8-bit images with fewer colors than its parent. It became a hit and was freely released to the public in 1990 August. However, after the initial release, there was reporting of bugs that the developers would fix occasionally, and hence there were many changes from the initial release. This made John Cristy release version 4.2.9 by the mid-1990s.
Imagemagick version 5 was developed when the user interface was made more friendly to beginners. More scripts and algorithms were included in the user interface functionalities. Version 5 made users to transfer scripts and algorithms from other languages and use them in Imagemagick. Though Imagemagick was developed in C, the enhancements and modules were developed in C++, and it is called Magick++. Several functionalities such as module loader, file identification, and test suites were added to Imagemagick using C++.
Imagemagick had changed its look and form in version 5. Going forward from version 5, a bug was found in the command line where if the users had many images to manage, it looks bulky and confusing. It became important to fix the command line as most users work with the command-line interface than the application’s user interface. The scripts used were mostly BASH and Perl that made necessary changes to the command line, which made the impossible possible by creating canvas in the command line interface. Initially, batch scripts were used that made the work easy in Windows, but it was difficult to use in Linux and other operating systems. So, windows batch scripts were modified to PHP scripts, and Bash scripts were introduced for other operating systems.
Version 6 also made it possible to use any scripts on the command line interface comfortable for the users and make it work on the functionalities. This works only for a single image at a time, and the user must create the API if he/she is developing in their own scripting language. We can also generate scripts by inputting images into the application. We can generate a text file, and the application produces images of the same on the web page. This helps to download the images directly from the application. It should be noted that images have different formats and hence browser support is necessary to get the image in the desired format. Imagemagick changes the font to Arial or Times New Roman font without any warning if the required font is not present.
Different versions of Imagemagick 6 saw changes in command line scripts mainly in the form of geometry, blurs, sharpening images, color changes, edging of images, and noise removal in the images. Furthermore, in addition to the C++ wrapper in Imagemagick, a .NET wrapper was provided in this version that helps users to make enhancements in their application either with C++ or .NET.
We have only versions from 6 available on the website, which was released in 2024. Previous releases are archived, and version 6 are legacy releases that can either be kept by the user or updated to the newer version. We can download these versions from the index of the Imagemagick webpage and use it further for any document creation. The versions available are 6.5, 6.6, 6.7, 6.8, 6.9, and the subversions of the same are available for the users to download and use for raster image editing.
In addition to RGBA images, CMYK and CMYKA images are also supported in newer versions of Imagemagick. For example, colorspaces and pixel channel support is provided in Imagemagick version 7 with any arbitrary images provided by the user, or the application takes an arbitrary version by itself. Hence, the support is provided to arbitrary Colorspaces where pixel channels are stored as floats, and hence the band values are rounded off, ignoring the error.
We have both 64-bit and 32-bit versions for each release of Imagemagick. 7.0.10 version was released in January, and the most recent 7.1.0 was released in August. Whenever any bugs are found, new version updates are released by the Imagemagick team, making users work with the most recent updates always. Major updates come with the release change in numbers, and this change will be published on the website. If the user prefers to go with the older version, they can download the same from the website and use it without making any updates to the software. Changes in scripts and images can be made either via the command line or user interface so that image modifications and color addition can be done through commands without seeing the images.Recommended Articles
This is a guide to Imagemagick version. Here we discuss the different versions for Imagemagick in detail for better understanding and also the step to install it. You may also have a look at the following articles to learn more –
Introduction to Greenshot
Web development, programming languages, Software testing & othersList of Greenshot Alternative
Given below is the list of Greenshot Alternative:1. SimpleScreenRecorder
SimpleScreenRecorder is a software solution from the Qt-based screencast to help you record the entire computer screen or part of that video audio. The software is designed specifically for those wishing to record a demo, play games, and other tasks. Solution with all the tools and functionality that helps you to capture and modify your recording is easy and easy to use. Furthermore, the programme synchronizes the video-audio-captured property, which reduces the video frame rates if the computer is too slow and multi-threaded.2. Lightscreen
Lightscreen is a Microsoft Windows-designed lightweight screen shooting software solution. The software is used for the automation of screenshot saving and cataloging. It works as a hidden background process, invoking a hotkey and saving screenshot files to your disc as the user wants. The solution, which allows you to easily capture the screen and share it without limitation, is quite simple and easy to use. An interesting fact is that you can capture the area of the screen and capture what you need, resize and adjust it for maximum flexibility.3. HotShots
HotShots was a tool that allows users to take and edit a screenshot. The software operates both on Linux and on Windows. It also enables users to edit their screenshots, for instance, to highlight an area. Even users can scroll through the software to capture or shoot an entire webpage. Users can point to any part where, on the one hand, likewise, any part of the screenshot may be removed. In addition, users can automate tasks such as showing a fast work menu, copying or annotating the image to the clipboard. During screenshots, users can hide the interface and add or remove the mouse cursor. Furthermore, hotShots enable users to add date and time in the filename, and when all tasks have been completed, they can also enable volumes. Finally, on your screenshots, users can draw forms, lines and other characters.4. ScreenRec 5. Recordit 6. FastStone Capture
FastStone Capting is an all-in-one universally available Windows operating systems screenshot shot and screen recording platform used to take a snap of the selected area of the application that has been opened in Windows and record what is going on the screen. It is one of the best applications with two primary functions for screenshotting and user recording.7. ShareX
ShareX is a free and open-source screenshot capture and screen capture application which is incorporated into various productivity and tools. Features and functions include capturing the complete screenshot of the display in contrast to the traditional Windows printing system. These frames are available in complete image capture, window recording, monitor capture, rectangle image capture. In addition, all captured screenshots are available in multiple frames.8. PicPick 9. Screenpresso
Screenpresso is an ultimate screen collection tool based on the two areas of the screenshot and takes either the whole window or some given region with snapshots. Besides capturing screenshots, it also offers capturing of video screens. This tool is intended for those interested in organizing training sessions and presenting detailed work to the audience.10. Skitch Conclusion – Greenshot Alternative
In this article, we have seen various Greenshot alternatives for capturing screenshots. You can choose any of them based on your requirements.Recommended Articles
This is a guide to Greenshot Alternative. Here we discuss the introduction and list of greenshot alternatives, respectively. You may also have a look at the following articles to learn more –
Introduction to Caffe TensorFlow
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Hadoop, Data Science, Statistics & othersHow does Caffe TensorFlow work?
It is an open-source GitHub repository which consumes prototxt file as an input parameter and converts it to a python file. Thus, with this, the Caffe model can be easily deployed in the TensorFlow environment. The pre-trained baseline models can be easily validated by using a validator file written in Python. For the older Caffe Models, upgrade_net_proto_text and upgrade_net_proto_binary files have to be used for first upgrading them to the latest version supported by Caffe and then following the subsequent steps mentioned inline to deploy it to the TensorFlow environment. It has one constraint that is the user needs to have a Python 2.7 environment to access it. Also, Caffe and TensorFlow models cannot be invoked concurrently. So, a two-stage process is followed. First, the parameters are extracted and converted using the converter file, which is then fed into the TensorFlow in the last stage. Also, the user’s border values and padding have to be taken care of as it is handled differently in both Caffe and TensorFlow.
The below steps describe how the user can use the above repository on his/her local machine.
To install Caffe-TensorFlow, use git clone command with the repository path to map it to your local folder.
It uses TensorFlow GPU environment by default which consumes more memory. To avoid getting into this, uninstall the default environment and install TensorFlow CPU.
Convert the Caffe model into TensorFlow by using python executable command with the chúng tôi file. It will take verbose parameters like Caffe model path, the prototxt file path, the output path where weights and other parameters related to the model are stored, the converted code path and a standalone output path which has a pb file generated if the executed command is successful. This file stores the model weights and the corresponding architecture.
Following steps can be followed by the user:
The model weights can be combined into a single file using a combine python file available as a gist on GitHub. The associated weights in it can be loaded into the user’s TensorFlow computational graph.
The ordering of complex layers used in TensorFlow and Caffe models are different. E.g. the concatenation of the LSTM gates is ordered differently for both TensorFlow and Caffe. Thus, the user needs to have a deeper look at the source code for both the frameworks, which is open-source.
A potential rudimentary first up approach which can be used easily by the user is as follows:
The Caffe Model weights can be exported into a NumPy n-dimensional matrix.
A simple model example can be run for the preliminary N layers of the Caffe Model. The corresponding output can be stored in a flat-file.
The user can load the above weights into his/her TensorFlow computational graph.
Step 2 can be repeated for the TensorFlow computational graph.
The corresponding output can be compared with the output stored in the flat file.
If the output does not match, then the user can check whether the above steps were executed correctly or not.
N’s value can be incremented after every iteration, and the above steps are repeated for its updated value.Benefits of Caffe TensorFlow
The Caffe Models are stored into a repository called Caffe Model Zoo. This is accessed by the researchers, academicians, scientists, students etc. all over the world. The corresponding models associated with it can be easily converted into TensorFlow. This makes it computationally faster, cheaper, less memory-intensive etc. Also, it increases the user’s flexibility and usage as the user does not have to implement the same Caffe Model into TensorFlow from scratch. It has also been used to train ImageNet models with a fairly good amount of accuracy. It can be in image classification, speech processing, Natural Language Processing, detecting facial landmarks etc. where Convolutional Networks, LSTM, Bi-LSTM models etc. are used.Conclusion
The Caffe-TensorFlow Model finds its usage across all industry domains as model deployment is required for both popular deep learning frameworks. However, the user needs to be wary of its limitations and overcome the same while developing the model in Caffe and deploying it in TensorFlow.Recommended Articles
This is a guide to Caffe TensorFlow. Here we discuss the introduction to Caffe TensorFlow and how it works with respective steps in detail and benefits. You can also go through our other related articles to learn more –
Netdata is a tool used for health monitoring and distributed real time performance of machines. It gives insights on anything that happens to a system through web dashboards.Features of Netdata
Uses a responsive bootstrap dashboard
It is light and very fast, hence using fewer resources
Little to no configuration is required to get started
It is able to monitor the whole system
In this article we are going to learn how to install Netdata on a Linux system and will show examples. Like I said before, it is very light and does not need any special hardware or software requirements to get it running.
Note: this article was written with a Ubuntu machine. Most of the commands will work, regardless of the distro you are using.Installation
Run the following command for a basic Netdata installation:
After getting the output above, you can then press Enter to install all the dependencies. You will then get a message that asks you to proceed to the next step, as shown below.
You can now download Netdata by running the command below and make netdata the active directory after it is done downloading:
You will now see the following output.
Press Enter to continue with the installation. At this step the installer will be compiling the source and installing it, and you will be able to get the following output if you were successful.
Netdata daemon configurations are now held at “/etc/netdata/netdata.conf” which was created for you.Configuration and Usage
To start netdata, you can run this command:
And this command stops it:
Netdata shows you the above commands on a successful install. It also shows you the link to use if you want to access the charts and graphs it creates. In my case the following image is what it shows.
If you visit the link, you will see the following image.
You can set Netdata to start automatically on system boot by running the following commands:
Stored data. Netdata stores only data from the past hour. Change this from “history = 3600” to “history = (your choice).”
Update interval. Netdata takes a second to refresh the charts and graphs in displays. To change this, change update every = 1 to your choice.
Port. Netdata uses port 19999. You can change this port to any other one that you want.
If there is a newer version of Netdata released that you would like to update to, you can use the command below which gets the new version and updates Netdata:
Running these commands uninstalls Netdata:
Netdata is a very useful tool. In a situation where you are running a system that is too slow or a server that is not working to your expectations, use Netdata to monitor their performance and find out what could be wrong. It allows you to monitor the CPU, memory, disks, network interfaces, IPV4 and IPV6 networking, interprocess communication, Netfilter, and processes among other items, therefore giving you the ability to understand your machine and configure it accordingly.
I am an intelligent and presentable individual with a degree in Computer Science and over four years experience in Management, Software Development, Information Technology Support and Tech article/tutorial writing. I possess a fresh, modern approach to the industry, employing creative and enthusiastic methods to problem-solving and would like to realize my full potential through practice, effectiveness, and innovation.
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Digital marketing can be controlled through software and programs that help marketers to do the tasks without much interference from the human brain. You only need to know how to use them, and the software and tools are ready to show you the results of your efforts. Later, marketers can channel the marketing and await the results.
In the next part, we will show you the top digital marketing tools and automation so that you can understand their functions and try to use them if you’re a digital marketer or plan to become an online marketer.The Top Digital Marketing Tools & Automation Understand the Features
The list we will share here is based on the current trend in digital marketing, and top marketers use these tools to produce outstanding results in their respective domains. Here we go −
Tools & Automation
Search Engine Optimization & Content Topics
Marketing Management Tool
Customer Relationship Management
Email MarketingGoogle Analytics
We keep Google Analytics in the first position because the entire marketing runs on the race of how to rank first on Google. Google is a powerful digital marketing tool that marketers can fetch good revenue if they know how to use it. Therefore, Google Analytics data is a treasure hunt for marketers, which can flip the profit and loss scenario during marketing operations.The Features
You can track the traffic on the business website, blogs, and social media company pages.
You can create a better landing page based on the analytics report.
You’ll get real-time updates about the traffic based on demography and the target audience.
Google Analytics shows you the business performance metric.
Marketers can link up with other tools with analytics to get reports of marketing efforts, strategy, and planning.
With the help of Google Analytics data reports, you can create customized reports and dashboards to ease the marketing process.Google Ads
Google Ads is working perfectly to promote business fastest among the target buyers. Based on the marketing budget, you can use its features and show the efforts to reach the right audience. The AI integration makes the tool super cool and easy to use, ensuring your business’s outstanding performance. As digital marketing is based on digitalization, integrated AI technology helps marketers to experiment with new techniques.The Features
You can influence website traffic with Google Ads
You can better manage the paid campaigns based on age, gender, location, profession, etc
Its best features come with Google Agency Account Strategist, where its Beta testing is also providedAhrefs
Ahrefs comes with the facility to develop a strategy for search engine optimization, as it’s a great tool to optimize the search engine options for your site or blogs. With the help of Ahrefs, you can check your site’s backlinks. The tool is extremely helpful in keyword research.The Features
Ahrefs offers the following Features −
You can optimize the business website, blogs, and other content sites
It helps in keywords research and trendy content topics
This SaaS tool offers a data index, a customized dashboard, and benchmark reporting
You can perform SEO audits and monitoring
With Ahrefs, you can build organic search traffic for your traffic
It helps in link buildingCanva Business
Canva helps you to design your post with images, infographics, and graphical presentations. Social media posts must be attractive graphically to catch millions of eyes, and Canva Business helps marketers to do the same. As visual content greatly impacts digital marketing, you can use Canva to portray the best design with attractive colors, patches, and graphics.The Features
Canva business offers the following Features:
It’s a great creative tool for visual content
You can design posts with images and infographics
You can design a great landing page, infographics for blogs, and several graphical posts for marketing
It offers its massive template library to design and create anything you want
It offers simple drag-and-drop options to create customized visual contentSemrush The Features
Semrush offers the following Features −
It helps in keyword research
You can track the rank of your website on Google
It helps in content marketing and content planning
With Semrush, you can target a local audience
It helps in Social media management
It helps in monetizing the websiteHubspot
Hubspot is a CRM ( customer relationship management) system and marketing tool that allows the business to manage and optimize the website and blogs. Hubspot provides a great tool for email marketing, analytics, social media management, reporting, etc.The Features
Hubspot offers the following Features −
You can track down the engagement, recent purchase history, detailed sales, and customer support
It offers an integrated CRM
You can edit the website with Hubspot
It helps in content creation and social media management
It helps in SEO practiceTrello
Trello is a content management tool that helps you with content strategy, planning, and content-sharing options. Trello helps in content organization, scheduling, and management online. You can keep multiple admins operating the tool for the marketing process. Further, Trello helps in marketing campaigns through several digital surfaces.The Features
The following features you can avail with Trello −
It provides the multiple admin access
Trello offers the Kanban system
You’ll get notified of all the marketing activity
Its responsive design and attractive dashboard encourage streamlining all the marketing strategy
It’s a user-friendly tool even for the beginnerMailchimp The Features
The dashboard is super easy to use, even good for beginners
Its AI-powered assistant helps in generating custom design
You’ll monitor the analytics report of marketing campaigns
A personalized email option is available
Its marketing automation helps in driving traffic, managing campaigns, increasing conversion, helps in sales
The above-noted tools and automation are market leaders in the digital marketing domain. There are many other tools available in similar niches. Let’s understand the benefits these tools serve in the marketing process.
Digital tools and software have been invented to reduce human involvement, reduce time consumption, and produce accurate results through complex operations. Let’s figure out in what way these tools bring benefits to your clients’ tables −
Tools and automation reduce the time of complex marketing techniques
With the help of tools cross- channel marketing campaigns are possible
The dynamic approach in marketing and strategy
Accurate campaigns results
Tools provide analytics reports for effective marketing strategy
Automation garners the marketing planning and adds fuel to the campaignsConcluded Part
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