What Is Claude Code?
Imagine you hired a very capable assistant who can read, write, and organize computer code, but instead of learning a special language to talk to them, you just explain what you want in plain English. That’s Claude Code.
It lives in a small text window on your computer called a “terminal” (think of it as a chat box that also happens to be plugged directly into your files and programs). You type what you want, “make me a simple webpage that says hello” and Claude Code writes it, checks its own work, and shows you the result.
You don’t need to know how to code to start. You just need to know how to describe what you want, the same way you’d describe a house you want built to an architect.
How It Actually Works
Think of Claude Code as a conversation, not a magic button. You describe a task, it proposes a plan or some changes, and you decide whether to approve them. It’s less like using a vending machine (put in money, get exact snack) and more like working with a contractor, you explain the job, they check in with you before doing anything major, and you review the work as it happens.
This back-and-forth matters because it’s also how you stay in control.
Installing Claude Code
You’ll need a Claude subscription (Pro, Max, Team, or Enterprise, the free plan doesn’t include Claude Code) and a computer running macOS, Windows, or Linux.
On macOS or Linux, open your terminal app and paste the below line:
curl -fsSL https://claude.ai/install.sh | bash
On Windows, open PowerShell and paste the below line:
irm https://claude.ai/install.ps1 | iex
Once that finishes, open a fresh terminal window in the folder you want to work in, and type:
claude
That’s it, Claude Code opens up and is ready to chat. To double check everything installed correctly, type:
claude --version
If you see a version number printed back, you’re good to go.
Security Basics Every Beginner Should Know
Some key security point should be noted before you make your hands dirty:
It asks before it acts. By default, Claude Code works like a contractor who won’t knock down a wall without asking first. It can look around and read files freely, but the moment it wants to edit something, delete something, or run a command that changes your system, it stops and asks for your “yes.” You can approve just that one action, or tell it “you can always do this” going forward.
It stays inside its lane. Claude Code can only make changes inside the project folder you started it in. Like a repair technician who only has a key to the one room you hired them for, not your entire house. If it wants to touch something outside that folder, it has to ask.
You’re the final check. No security feature replaces your own judgment. Before you approve any change, take a few seconds to read what it’s proposing, the same way you’d skim a contract before signing it, rather than signing blindly because someone told you it was fine.
Be careful what you paste in. Just like you wouldn’t open an email attachment from a stranger, avoid pasting large chunks of text from untrusted or unknown sources directly into Claude Code and asking it to run with them, that text could contain hidden instructions designed to trick it.
Updates matter. Claude Code updates itself in the background automatically, similar to how your phone quietly installs security patches. Keeping it updated means you get the latest fixes too.
Writing Prompts That Get You Good, Safe Results
Since you’re steering by conversation, how you ask matters. A few habits that make a real difference for beginners:
Be specific, like giving directions to a taxi driver. “Build me an app” is vague. “Build me a single webpage with a title, a photo, and a contact button” gives Claude something concrete to work with.
Break big asks into small steps. Instead of “build my whole website,” try “first, just make the homepage layout.” Small steps are easier to review and easier to fix if something’s off.
Ask it to explain itself. If you don’t understand a change or a command it wants to run, just ask: “what does this do, in plain English?” A trustworthy assistant should be able to explain its own work and Claude Code will.
Ask for a way to check the work. Beginners can still ask, “how can I tell this worked?” Claude Code can set up a simple check for you, the same way a contractor might show you the finished room before calling the job done.
Thats it for part one. Understand Claude code first then try it and Enjoy.
About the Author: Imtiaz is working in a financial organization in Bangladesh and having experience in system, network and security administration. Feel free to contact with him on LinkedIn or Twitter.