Introduction:
If you’re working with Node Versions, you might have multiple versions installed and need to know which ones are available. Whether you’re managing different projects or want to verify your setup, here’s a simple guide on how to check the installed Node.js versions.
what is meant by Node versions?
Node versions refer to the different releases of Node.js, a JavaScript runtime that allows developers to run JavaScript code outside of a browser. These versions are categorized into:
Current Version:
This is the latest release with the newest features. It’s ideal for testing or trying out the latest tools but not always stable for production.
LTS (Long-Term Support):
These versions are stable and maintained for a longer period, making them suitable for production environments.
Each version has a number, like v16.20.0, representing its major, minor, and patch updates. Regular updates include new features, bug fixes, and security patches.
What are the Using NVM (Node Versions Manager)?
If you use nvm (Node Versions Manager) to handle multiple Node Versions, checking installed versions is straightforward:
List Installed Versions:
Open your terminal and type:
nvm lsThis command lists all Node.js versions you’ve installed using nvm, and the currently active version is highlighted, based on the command control permission a user has.
Check the Version in Use:
To see which version of Node.js is presently being used, you can also type:
nvm currentWithout Node Versions Manager
If you’re not using nvm, and you have Node.js installed in different ways (like via package managers or directly from binaries), you might need to check manually:
Using which Command:
First, find out where Node.js is installed: which node
This command tells you the path to the Node.js binary being used. You can check if you have multiple installations by inspecting directories.
Check Node Binary Locations:
Look into standard directories where Node.js might be installed. For example:
ls /usr/local/bin/node
ls /usr/bin/nodeChecking these directories might help you find different Node.js versions if they are installed in non-standard locations.
Using node -v for the Current Version
To check the currently active version of Node.js, you can use:
node -v
This command displays the Node Versions currently in use. If you’re using Ubuntu version, this will reflect the active version according to your current system configuration.
Looking for Node.js Version Files
In some setups, especially with custom installations, version files might be present. Look for these files in your Node.js installation directories.
Conclusion
Knowing which versions of Node.js are installed on your system helps you manage your projects effectively, especially when working with multiple projects requiring different Node.js versions. Use nvm for an easy way to handle various versions, or manually check directories and binaries if you’re using other installation methods.
FAQs
1. How do I install nvm?
You can install nvm by following the instructions on the nvm GitHub page.
2. Can I have multiple Node.js versions installed without nvm?
Yes, but managing them manually can be complex. Nvm simplifies this process.
3. What if I can’t find Node.js installed?
It might not be installed or be installed in an unusual directory. Verify the installation with package managers or check installation paths.
4. How do I uninstall a Node.js version with nvm?
Use the command nvm uninstall <version> to remove a specific version installed with nvm.
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