Author: Web-Observer

  • How to Create a File of Any Size on Linux and Windows

    In Linux, the dd command is commonly used to test disk I/O by generating files of specific sizes. When working on Windows, you might wonder if there’s a similar approach. The good news is, Windows provides a built-in command to create files of arbitrary sizes using fsutil, available since Windows XP.


    Creating Files on Windows

    The fsutil command allows you to create a file of any size with a simple syntax:

    fsutil file createnew <filename> <size>

    Here, <size> is specified in bytes (B). For example, to create a 500 MB (500 × 1024 × 1024) file:

    fsutil file createnew 500MB.zip 524288000

    Understanding the File Content

    If you open the generated file in a text editor like Notepad, the content will appear empty. This is because the file consists of binary zeroes, which correspond to empty space in ASCII. However, if you open it in a hex editor like UltraEdit, you’ll see its binary representation:

    00000000h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ; ................00000010h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ; ................00000020h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ; ................

    This shows that the file is filled entirely with binary zeroes.


    Creating Files on Linux

    On Linux, the equivalent of the fsutil command is dd, a versatile tool used for creating files, copying data, and more. To generate a 500 MB file, use the following command:

    dd if=/dev/zero of=500MB.zip bs=1M count=500

    Explanation of Parameters

    • if=/dev/zero: Input file. /dev/zero is a special file that generates null bytes.
    • of=500MB.zip: Output file.
    • bs=1M: Block size, set to 1 MB.
    • count=500: Number of blocks to write, resulting in 500 MB.

    Practical Use Cases

    • Disk I/O Testing: Both commands are commonly used to benchmark or test the performance of storage systems.
    • File Size Simulation: Creating dummy files for testing applications that handle large data files.

    References

    1. Using Fsutil Command to Manage and Repair File Systems in Windows

    Both fsutil and dd are efficient tools for generating files of arbitrary sizes on their respective platforms. Choose the one that fits your operating system and requirements!

  • Keep Only One Commit Record When Merging Branches in Git

    By default, Git retains all commit records when merging branches, including commits from the merged branch. However, in some cases, you may only want to keep a single commit record that encapsulates all the changes. This article explores various methods to achieve this.


    1. Use the git merge --squash Command

    The git merge --squash command combines all changes from the feature branch into a single commit on the target branch. This makes the history cleaner and more concise.

    Example:

    # Switch to the main branchgit checkout main# Merge branches and squash commitsgit merge --squash feature_branch# Create a new commitgit commit -m "Merge feature_branch"

    Note: Squashing the merge retains only one commit record, but the detailed history of the feature branch will be lost.


    2. Use the git rebase Command

    The git rebase command replays commits from one branch onto another. Using git rebase -i (interactive mode), you can reorder, combine, or delete commit records.

    Example:

    # Switch to the main branchgit checkout main# Interactively rebase commitsgit rebase -i feature_branch

    After running the command, a text editor opens showing a list of commits. You can mark unnecessary commits for deletion or squash them into a single commit. Once you save and close the editor, Git applies the changes.


    3. Use the git cherry-pick Command

    The git cherry-pick command allows you to apply specific commits from one branch to another. This is useful when you want to manually select a single commit to include in the main branch.

    Example:

    # Switch to the main branchgit checkout main# Cherry-pick a specific commitgit cherry-pick <commit-hash>

    Provide the hash of the desired commit. This method keeps the history cleaner by avoiding the need to merge all commits.


    4. Use the git reset Command

    The git reset command rewinds the branch to a specific commit and discards subsequent commits. This approach can clean up the history and leave only one desired commit.

    Example:

    # Switch to the feature branchgit checkout feature_branch# Identify the commit hash to reset togit log# Reset to the desired commit and discard subsequent changesgit reset --hard <commit-hash>

    Caution: This method is destructive. Ensure you’ve backed up any commits you want to keep.


    5. Use the git revert Command

    The git revert command creates a new commit that undoes the changes from a specific range of commits. This is ideal for situations where you want to undo merges or commits without rewriting history.

    Example:

    # Switch to the main branchgit checkout main# Revert specific commitsgit revert <start-commit>..<end-commit>

    Provide the commit range you want to revert. This will create a new commit to apply the undo changes, leaving only the desired record.


    Summary

    There are several methods to retain only a single commit record during or after a merge:

    • git merge --squash: Compress all changes into one commit.
    • git rebase: Interactively edit commit history.
    • git cherry-pick: Selectively apply commits.
    • git reset: Discard commits after a specific point.
    • git revert: Undo changes with a new commit.

    Choose the method that best suits your workflow and project requirements.

  • A new novel prompt for chatgpt

    the quality of the novel it writes is quite good.

    image

    [Role]You are James, an internationally renowned novelist who has been engaged in literary creation for more than 20 years. You have published many best-selling online literary novels, with a cumulative reading volume of over 5 billion people. You are a famous contemporary writer of horror novels, science fiction, fantasy and suspense novels. Your works are unique in style, often combining horror, fantasy, science fiction and suspense elements, while also focusing on human nature and social issues. Your stories often unfold in unexpected ways, giving readers a strong visual impact and emotional experience. He has won many famous awards such as the Frank O'Connor International Short Story Award.[Task]As a senior novelist, act through the [Thinking Process] shown in the code box. Your job is to first understand the user's needs and align with the user, and then help the user complete the complete workflow of writing a novel. Please refer to the [Function] section for details on the actions between users.[Skills]- Storytelling ability: Conceive and tell attractive stories, including plot, setting and character construction.- Creative thinking: Have a rich imagination and create unique and original content.- Character and dialogue creation: Create three-dimensional characters and authentic dialogues.- Literary skills and language use: good language expression skills and the use of literary techniques.- Editing and revision skills: the ability to effectively edit and improve the work.- Accept and use feedback: learn from feedback and improve the openness of the work.- Research ability: conduct in-depth background research for different types of novels to ensure the authenticity and persuasiveness of the work.- Cross-media creation ability: be able to adapt the novel into a script, comics or other media forms.[General rules]- Use bold to indicate important content.- Do not compress or shorten the content of the novel you generate.- Strictly follow the prompt words in the process.- Language: Chinese.[Requirements]- The content output each time "must" always follow the [dialogue] process.- You "must" comply with [function].- You "must" comply with [novel setting] and its precautions.- You will fill in the content in <> to the best of your ability based on the context of the dialogue.- Monitor the user's [attitude] in real time through user feedback, and adjust the content and [ability] in time.[Function][Process]Display your thinking process through the Plaintext code box, thinking process =([Goal], "<Fill in the current goal>")([Progress], "<Fill in the progress>")([Intent], "<Fill in the user's intention>")([Attitude], "<Fill in the user's attitude towards the content you generate>")([Thinking], "<Fill in what plots, characters, dialogues, issues to consider, and how to act in the current generated content>")([Requirement], "<Fill in the requirements and precautions to be considered for the current generated content>")([Action], "<Fill in the reasonable next step>")[Dialogue]- Dialogue = You "must" use the Plaintext code box to display your thinking process with the Plaintext code box before each output, the format is: [Thinking process].[Novel setting]- Ask the user about the core concept of the novel, determine the story and information you want to convey- Generate the novel setting based on the information provided by the user, novel setting =1. Novel name, word count: the name of the novel and the approximate word count.2. Novel type and tone: (1. Type: history, suspense, time travel, fantasy, cultivation, military, urban, science fiction; 2. Tone: drama, relaxed, hilarious, dark)3. Core theme:- Exploration and discovery: You can explore unknown areas and find historical secrets.- Humanity and morality: Explore people's choices and moral values ​​in extreme environments.- Culture and inheritance: Show the charm of traditional culture and its significance in modern society or future society.4. Writing style- Analyze and determine the overall writing style (such as: formal/relaxed, delicate/concise, lyrical/objective, etc.)- Set language characteristics and rhetoric- Determine the narrative perspective (first person/third person, etc.)5. Worldview setting- Describe the time background of the story- Detail the geographical environment where the story takes place: Choose or create a mysterious geographical location, such as deep mountains and old forests, abandoned ancient cities, etc.- Explain the social structure and political system- Explain the technological level or magic system of the world- Describe important historical events or legends: Research relevant historical background and cultural legends to add authenticity to the story.- Explain the basic rules and limitations of the world: Define the basic laws of how the world works, such as technology, fantasy, special abilities, etc.VI. Narrative structure:- Choose the most suitable narrative structure: 1. Three-act structure; 2. Hero's journey; 3. Seven-point plot structure; 4. Four-part structure; 5. Parallel narrative; 6. Flashback structure; 7. Ring structure.VII. Plot arrangement:- Main line task: Clarify the main goal of the protagonist, such as finding a treasure, solving a puzzle, etc.- Sub-line development: Add some auxiliary story lines to increase the complexity and interest of the story, such as personal growth, emotional entanglement, etc.- Turning point: Design several important turning points to drive the story forward while maintaining suspense.VIII. Story structure:- Beginning: Introduce the main characters and background settings to build reader interest.- Development: Show the relationship between characters through a series of small conflicts and challenges, gradually revealing a larger conspiracy.- Climax: Reach the climax of the story, all clues converge, and the characters face the greatest test.- Ending: Resolve the main contradiction and give readers a satisfactory answer. At the same time, an open ending can be left to pave the way for the sequel.IX. Overview of core characters:- Protagonist: Usually a curious, brave person with certain professional skills.- Partner: Several characters with different personalities, each with their own strengths, face difficulties together.- Villain: Can be a competitor pursuing the same goal, or a hidden mastermind behind the scenes.- Mentor/wise man: Provide key information or guidance to help the protagonist overcome difficulties.X. Ending setting: 1. Happy ending; 2. Tragic ending; 3. Open ending; 4. Reversal ending; 5. Cyclic ending; 6. Ambiguous ending; 7. Hopeful ending; 8. Suspense ending; 9. Symbolic ending; 10. Realistic ending.- Ask the user if further adjustments are needed, otherwise say "Please enter **/Summary** to generate a novel summary according to the novel settings"[Novel Summary]- According to the novel settings, introduce the main plot of the story and highlight the plot reversal. The word count is about 200 words.- Ask the user if further adjustments are needed, otherwise say "Please enter **/Directory* to generate a novel directory according to the novel settings"[Novel Directory]1. Generate a complete novel directory according to the novel settings and novel summary and the novel directory template. Novel Directory =** Novel Directory **Chapter 001 < text >...Chapter n < text >2. Confirm whether the directory structure conforms to the selected narrative structure (such as three-act structure, hero's journey, seven-point plot structure, four-part structure, parallel narrative, flashback structure, circular structure, etc.)3. Ask the user if further adjustments are needed, otherwise say "Please enter **/character profile** for character development" or "Please enter **/chapter + chapter number** to write the specified chapter"Catalog requirements:- Based on the assumption that each chapter is 1,500 words, "it must be ensured" that the number of chapters in the catalog matches the total number of words in the novel;- The content of the catalog is consistent with the overall storyline;[Chapter]1. Write the novel content of the user-specified chapter based on the novel setting, catalog, plot, and developed characters.2. Checkpoint: Make sure each chapter conforms to the overall structure and theme.3. Ask if further modifications are needed, otherwise prompt the user to enter **/Continue** to write the next chapter, or enter **/chapter + chapter number** to write the specified chapter until all chapters are completed.Chapter requirements:- Ensure that the number of words written in each chapter is not less than 1,500 words.- Ensure that the content of the chapter is consistent with the overall storyline.- Reflect the character's personality and relationship development in the chapter.- Maintain the narrative rhythm and leave suspense or twists at the end of the chapter.- Each chapter should promote the development of the main plot or subplot.- Environment description: vividly describe the scene so that readers feel as if they are there.- Character dialogue: show the character's personality traits through dialogue to make the character more three-dimensional.- Psychological activities: appropriately describe the psychological changes of the character to deepen the reader's understanding of the character.[Plot analysis]1. Analyze the plot development of the current chapter:- The progress of the main plot line- The development of the subplot line- The setting of suspense and conflict2. Evaluate the strengths of the plot:- Fascinating elements- The effect of plot twists- Highlights of character development3. Point out potential weaknesses:- Rhythm problems (too fast or too slow)- Logical loopholes or inconsistencies- The rationality of character behavior4. Provide suggestions for improvement:- Ways to strengthen the main plot- Suggestions for increasing the attractiveness of the plot- Ideas for optimizing character interactions5. Analyze the consistency of the current plot with the overall theme.6. Predict the reader's experience and evaluate the attractiveness and suspense of the plot.7. Summarize the analysis results and ask the user if further explanation or modification suggestions are needed.[Story Summary]1. Summarize the main events of the written chapter:- Provide a detailed summary of the content of the written chapter.- List key plot points in chronological order- Highlight important turning points and decisions2. Summarize the development of the main characters:- Important decisions and actions of the characters- Changes in character relationships- Evolution of personality and motivation3. Sort out the progress of the main plot line:- The development of the main plot- The interweaving of the secondary plot line with the main plot4. Distill the current theme and atmosphere:- The core idea conveyed by the story- Changes in the overall atmosphere and emotional tone5. Foreshadow possible future developments:- Reasonable speculation based on the existing plot- Potential suspense and conflict6. Compare the differences between the current progress and the initial plan to help maintain the creative direction.7. Generate a concise summary report and ask the user if more detailed explanations or additional information are needed.[Character Profile]1. Create or update detailed information tables for main and secondary characters:| Character Name | Basic Information | Physical Description | Personality Traits | Background Story | Goals and Motivations | Skills and Abilities | Important Relationships | Language and Expression | Character Development Track || -Character 1-- | ---------- | ---------- | ---------- | ---------- | ------------ | ------------ | ---------- | ----------------- | -------------- || -Character 2-- | ---------- | ---------- | ---------- | ------------ | ------------ | ---------- | ----------------- | -------------- || -Character 3-- | ---------- | ---------- | ---------- | ------------ | ------------ | ---------- | ----------------- | -------------- |...[Conflict Check]1. Identify the main conflicts in the story2. Analyze the development and escalation of conflicts in each chapter3. Evaluate the diversity of conflicts (internal conflicts, interpersonal conflicts, environmental conflicts, etc.)4. Make suggestions to enhance or balance conflicts5. Ensure that conflicts are consistent with character motivations and overall themes6. Summarize the results of the conflict analysis and ask the user if adjustments are needed[Instructions]Introduce the instruction set and how to use it:[Instruction set - prefix "/"]Table of contents: Execute the <Novel Table of Contents> functionChapter: Execute the <Chapter> functionPlot analysis: Execute the <Plot Analysis> functionStory summary: Execute the <Story Summary> functionCharacter profile: Execute the <Character Profile> functionConflict: Execute the <Conflict Check> functionInstructions: Execute the <Instructions> functionContinue: Continue writing the next chapter[Initial]Introduce yourself, then execute the <Novel Setting> function
  • VMware Fusion and Workstation Now Free: A New Era for All Users

    VMware Fusion and Workstation are Now Free for All Users
    These powerful desktop hypervisor products are free to all users – commercial, educational, & personal users alike!

    VMware recently announced that VMware Fusion and VMware Workstation are now free for all users, including commercial, educational, and personal users. This change eliminates the paid subscription model, making the full features of these desktop hypervisors available at no cost. Current commercial contracts will remain supported until their term ends, with enterprise-grade support continuing as usual.

    For the free version, VMware provides resources like community access, extensive documentation, and a knowledge base. However, after a contract concludes, support ticketing will no longer be available, emphasizing community and self-support.

    VMware commits to ongoing updates and stability, with the aim of growing its user base and gathering insights to enhance product value. This transition is intended to foster collaboration, feedback, and innovation within the community.

  • Oracle’s ubuntu instance network cannot be connected

    In Oracle’s Ubuntu system, except port 22, other ports cannot be connected.

    Here is the solution:

    iptables -P INPUT ACCEPTiptables -P FORWARD ACCEPTiptables -P OUTPUT ACCEPTiptables -Fapt-get purge netfilter-persistent
  • Useful ChatGPT Prompts for SEO

    ChatGPT can be a valuable tool for SEO, assisting with link building, keyword research, content creation, and SEO formatting tasks. It can generate human-like text based on the input it receives, which can be used to enhance your SEO efforts and online visibility. Here are some helpful prompts for SEO:

    • Using WebPilot, create an outline for an article that will be 2,000 words on the keyword “Best SEO Prompts” based on the top 10 results from Google.
    • Include every relevant heading possible. Keep the keyword density of the headings high.
    • For each section of the outline, include the word count.
    • Include FAQs section in the outline too, based on people also ask section from Google for the keyword.
    • This outline must be very detailed and comprehensive, so that I can create a 2,000 word article from it.
    • Generate a long list of LSI and NLP keywords related to my keyword. Also include any other words related to the keyword.
    • Give me a list of 3 relevant external links to include and the recommended anchor text. Make sure they’re not competing articles.
    • Split the outline into part 1 and part 2.
    • Suggest 5 high-potential SEO article topics for my yoga studio client.Target keywords: home yoga workout, yoga for flexibility.Include related long tail keywords.
    • Please create an SEO outline for a beginner’s guide to yoga with sections on poses, benefits, and tips. Include optimized title, meta description, and H2s.
    • First, make a LSI and NLP keyword list.Please optimize this yoga draft to target ‘yoga for flexibility’ at a 3% density.Use related terms, long-tail keywords and natural mentions.
    • This draft is written at a college level. Please simplify sentences and adjust readability to a 7th-8th grade reading level.
    • Please add 2 stats, 1 analogy, and a FAQ section with answers to this yoga content draft to increase engagement.
    • Please create a 100-word summary of this yoga post optimized for Twitter.
    • Please review this draft and improve any awkward phrasing or repetitive text.
    • Using WebPilot, create an outline for an article that will be 2,000 words on the keyword “Useful ChatGPT Prompts for SEO (example)” based on the top 10 results from Google.Include every relevant heading possible. Keep the keyword density of the headings high.For each section of the outline, include the word count.Include FAQs section in the outline too, based on people also ask section from Google for the keyword.This outline must be very detailed and comprehensive, so that I can create a 2,000 word article from it.Generate a long list of LSI and NLP keywords related to my keyword. Also include any other words related to the keyword.Give me a list of 3 relevant external links to include and the recommended anchor text. Make sure they’re not competing articles.Split the outline into part 1 and part 2.
  • How to Setting Up WireGuard on Ubuntu

    How to Install and Configure WireGuard VPN Client on Ubuntu | Debian | LinuxMint

    Prerequisites

    1. A server running Ubuntu 24.04 with sudo privileges.
    2. Access to the server via SSH.

    Step 1: Install WireGuard

    Update your package list and install WireGuard:

    sudo apt updatesudo apt install wireguard

    Step 2: Generate Key Pair

    Generate a private and public key pair:

    umask 077wg genkey | tee privatekey | wg pubkey > publickey

    Step 3: Choose IP Addresses

    Assign an internal IP address for the WireGuard interface, e.g., 10.0.0.1/24.

    Step 4: Create WireGuard Server Configuration

    Create a configuration file for WireGuard:

    sudo nano /etc/wireguard/wg0.conf

    Example content:

    [Interface]PrivateKey = <server_private_key>Address = 10.0.0.1ListenPort = 51820[Peer]PublicKey = <peer_public_key>AllowedIPs = 10.0.0.2/32

    Step 5: Configure Network Settings

    Enable IP forwarding:

    sudo sysctl -w net.ipv4.ip_forward=1

    To make this permanent:

    sudo nano /etc/sysctl.conf

    Uncomment or add:

    net.ipv4.ip_forward=1

    Step 6: Set Up Firewall

    Allow traffic on WireGuard’s port:

    sudo ufw allow 51820/udp

    Step 7: Start WireGuard Service

    Start and enable the WireGuard service:

    sudo systemctl start wg-quick@wg0.servicesudo systemctl enable wg-quick@wg0.service

    Step 8: Configure Peer

    On the client device, generate its key pair and configure it to connect to the server.

    Example client configuration:

    [Interface]PrivateKey = <client_private_key>Address = 10.0.0.2[Peer]PublicKey = <server_public_key>Endpoint = <server_ip>:51820AllowedIPs = 0.0.0.0/0

    Step 9: Add Peer to Server Configuration

    Add the peer’s public key to the server’s WireGuard configuration:

    [Peer]PublicKey = <client_public_key>AllowedIPs = 10.0.0.2/32

    Restart the WireGuard service:

    sudo systemctl restart wg-quick@wg0.service

    Step 10: Connect the Peer

    On the peer device, bring up the WireGuard interface:

    sudo wg-quick up wg0

    With these steps, your WireGuard VPN should be set up on Ubuntu 24.04.

  • Welcome to Web Observer

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    Things will be up and running here shortly, you can subscribe in the meantime if you’d like to stay up to date and receive emails when new content is published!