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  • How to generate a pair of RSA private and public key in Linux?
    Posted on Sunday November 17, 2019
    How to generate a pair of RSA private and public key in Linux? To generate an RSA private key: openssl genrsa -out private.pem 2048 To generate the RSA public key from the RSA private key: openssl rsa -in private.pem -outform PEM -pubout -out public.pem The post How to generate a pair of RSA private and public key in Linux? appeared first on SysTutorials. Continue Reading »
  • How to encrypt a file using openssl on Linux non-interactively?
    Posted on Saturday November 16, 2019
    How to encrypt a file using openssl on Linux non-interactively? The passphrase shall be provied to openssl in a programmatic way instead of requesting the user to input it, so that the command may work in a regular cron job or some batch jobs. To encrypt file file.tgz and store it to file.tgz using aes-256-ebc […] The post How to encrypt a file using openssl on Linux non-interactively? appeared first on SysTutorials. Continue Reading »
  • Xen: VM failed to boot
    Posted on Wednesday October 16, 2019
    Question: Hello, I am using Xen on Centos 7 and it was working fine from last 3 years. After I reboot the VM I am getting below error: "dracut-initqueue[270]: Warning: dracut-initqueue timeout - starting timeout scripts" "[ 195.426203] dracut-initqueue[270]: Warning: Could not boot. [ 195.435712] dracut-initqueue[270]: Warning: /dev/centos_static/root does not exist [ 195.436499] dracut-initqueue[270]: Warning: […] The post Xen: VM failed to boot appeared first on SysTutorials. Continue Reading »
  • How to Synchronize Thunderbird Calendar and Address Book with Office365 Exchange Online using ActiveSync
    Posted on Saturday October 05, 2019
    Thunderbird is a nice email client available on Linux and Windows. With the Lightning plugin, Thunderbird can support calendar functions well. Exchange is a widely used email and calendar/address book service software. Office 365 provide the cloud version of Exchange named Office 365 Exchange Online. Although Exchange Online provide IMAP for synchronizing emails, it provides […] The post How to Synchronize Thunderbird Calendar and Address Book with Office365 Exchange Online using ActiveSync appeared first on SysTutorials. Continue Reading »
  • How to Make iPhone with iOS 13 Faster
    Posted on Monday September 30, 2019
    After the recent iOS upgrading to version 13, many older iPhones such as iPhone 8 turn to be running slower, although there are many new features. New features and functions use more CPU/GPU/memory and the iOS may run slower. But are there any methods to make it run faster? After quite some research and testing, […] The post How to Make iPhone with iOS 13 Faster appeared first on SysTutorials. Continue Reading »
  • What Are the Secrets Behind Google’s Success Story?
    Posted on Saturday September 07, 2019
    Google has created an image that tells us its core values are centered around innovation. There are very few companies that can boast a similar level of influence as Google. Nevertheless, we should not only focus on Google’s achievements today but also learn from their journey to the top. We can break down Google’s core […] The post What Are the Secrets Behind Google’s Success Story? appeared first on SysTutorials. Continue Reading »
  • The cultural impact of cloud technology
    Posted on Wednesday September 04, 2019
    Cloud technology is one of the latest forms of technology. A cloud is a place where exactly the data is stored. Also, the cloud is the place where the data is managed and processed. Cloud ensures that the data managed on a cluster or the network of servers. All of these servers are available remotely […] The post The cultural impact of cloud technology appeared first on SysTutorials. Continue Reading »
  • What is the Future of Big Data Analytics and Hadoop?
    Posted on Thursday July 18, 2019
    Big Data has taken a lead in the IT industry and has played a significant role in the Business growth and decision-making processes that gives you an edge over the competitors. This is equally applicable to the organizations as well as professionals existing in the analytics domain. Big Data Analytics bring an ocean of opportunities […] The post What is the Future of Big Data Analytics and Hadoop? appeared first on SysTutorials. Continue Reading »
  • How to generate a pair of SSH private key and public key pairs?
    Posted on Tuesday July 16, 2019
    How to generate a pair of SSH private key and public key pairs? On Linux, you can generate one first by $ ssh-keygen -t rsa By default on Linux, the key pair is stored in `~/.ssh` named `id_rsa` and `id_rsa.pub` for the private and public key. The post How to generate a pair of SSH private key and public key pairs? appeared first on SysTutorials. Continue Reading »
  • How to cat a text file out from a tar archive without having to extracting it?
    Posted on Sunday July 14, 2019
    How to cat a text file out from a compressed tar archive package without having to extracting the whole package? For example, I have a pkg.tar.gz which contains a text file pkg/readme.txt in it. How to cat the pkg/readme.txt file content out? You may use this command to cat out the file content: tar -O […] The post How to cat a text file out from a tar archive without having to extracting it? appeared first on SysTutorials. Continue Reading »
  • How to Change Windows User Name on Windows 10 Using Computer Management
    Posted on Sunday July 14, 2019
    The Windows user name can be changed according to the user’s needs and requirement. The Windows 10 Windows Settings tool interface keeps changing after updates. It is a little hard to find out the tool to do the user name changing. One way to change Windows user name is to do it through the Computer […] The post How to Change Windows User Name on Windows 10 Using Computer Management appeared first on SysTutorials. Continue Reading »
  • How to mirror a website using wget on Linux?
    Posted on Thursday June 13, 2019
    How to mirror a website using wget on Linux? If the command can filter only specific file extensions, such as pdf and docx, it will be much better too. To download all PDF files from https://example.org/path/ as an example, you may use this command: wget --mirror \ --convert-links --no-parent --quiet \ --adjust-extension -A pdf \ […] The post How to mirror a website using wget on Linux? appeared first on SysTutorials. Continue Reading »
  • How to Statically Link OCaml Programs
    Posted on Saturday June 08, 2019
    Static linking is preferred for some cases although it has its own various problems. Static building/linking is not always possible for some languages on some platform. For OCaml, the answer to this question is yes. In this post, we will introduce 2 methods to statically linking OCaml: static linking with runtime glibc required and static […] The post How to Statically Link OCaml Programs appeared first on SysTutorials. Continue Reading »
  • 5 necessary PC hardware that a programmer needs to upgrade
    Posted on Thursday May 30, 2019
    The world of technology has evolved drastically over the last few decades. Almost every aspect of our lives is dominated by technology. At the heart of technology lies computer programming. Computer programming is what dictates the success of the technology. I mean think about it, your smartphone, PC, ETC they all rely on programming. This […] The post 5 necessary PC hardware that a programmer needs to upgrade appeared first on SysTutorials. Continue Reading »
  • New Linux Kernel 5.0: Features and Improvements
    Posted on Saturday April 13, 2019
    Linux is the most used and well-known open-source operating system for computers, mobile devices, servers, and mainframes, etc. Linux has so many awesome features to serve its users like Live CD/USB. And it is fast, easy and free to use by computers around the world. The kernel is referred to as the essential component of […] The post New Linux Kernel 5.0: Features and Improvements appeared first on SysTutorials. Continue Reading »
  • How to write to remote side with sudo in rsync?
    Posted on Saturday April 06, 2019
    Here is the case, the user can not write directly to the remote side’s directory, while the user can sudo on the remote side and write the directory with sudo. How to write to remote side with sudo in rsync? On the source machine, run the rsync command with --rsync-path="sudo rsync" added. For example, rsync […] The post How to write to remote side with sudo in rsync? appeared first on SysTutorials. Continue Reading »
  • How to write file content with sudo in Vim?
    Posted on Saturday March 23, 2019
    Vim opens file even if the user does bot have write permission to the file. But after revision, how to write file content with sudo in Vim if Vim reports no permission to write the file. Use this command inside of vim to write to the file with sudo: :w !sudo tee % Here, ! […] The post How to write file content with sudo in Vim? appeared first on SysTutorials. Continue Reading »
  • How to limit shared AWS EC2 accounts’ access to view and start all VMs yet stop only certain VMs
    Posted on Sunday March 10, 2019
    If a team with many accounts share and manages the virtual machines under that same AWS accounts, it is a common practice to limit AWS EC2 accounts’ access to view or start all VMs yet stop only certain VMs. For example, one account has 50 VMs tagged "prod" while 25 VMs tagged "dev". The developers […] The post How to limit shared AWS EC2 accounts’ access to view and start all VMs yet stop only certain VMs appeared first on SysTutorials. Continue Reading »
  • What can we expect in Java update 2019?
    Posted on Friday March 08, 2019
    Java is the most regularly used programming language for the creation of web applications. This high-level programming language develops by the Sun Micro-system. This language was designed for use in the world of internet and known for fastest, secure, and most reliable language of the computing platform. One interesting fact is that Java programmers are […] The post What can we expect in Java update 2019? appeared first on SysTutorials. Continue Reading »
  • How to do screen recording on Wayland in Linux?
    Posted on Friday January 25, 2019
    How to do screen recording on Wayland in Linux? Many screen recorders do not work on the new Wayland.. You may try Green Recorder which supports Wayland. If you use Ubuntu 18.04, you may install Green Recorder from the following PPA: sudo add-apt-repository ppa:fossproject/ppa sudo apt update sudo apt install green-recorder The post How to do screen recording on Wayland in Linux? appeared first on SysTutorials. Continue Reading »

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