Some common CentOS Node.js errors and their solutions

When using Node.js on CentOS, you may encounter various errors and problems. In this article, I will introduce some common CentOS Node.js errors and their solutions.

1. “command not found” error

When you run node or npm commands in the terminal or console, you see the “command not found” error. This means that the system cannot find the node or npm command.

Workaround:

Enter the following command at the command line:

sudo yum install nodejs
sudo yum install npm

This will install Node.js and npm. If they are already installed, you can try uninstalling them and reinstalling them.

2. "Error: Cannot find module" Error

You may see this error when you try to reference a module in your program. This is usually because the system cannot find the module.

Solution:

First, make sure the module is properly installed and configured in your application. You can use npm to install and manage modules.

Secondly, try to install the missing modules manually. Install the module manually with the following command:

npm install module_name

Here, module\_name is the name of the module you want to install.

3. "Error: listen EACCES" Error

You may encounter this error when setting the port to 80 or 443 in a Node.js application. This is usually because the application is trying to use a protected port.

Workaround:

In order to use port 80 or 443 in CentOS, you need to run the application with root privileges. For this you can use sudo command. For example:

sudo node app.js

This will run your application with administrator privileges and allow you to use protected ports.

4. "Error: ENOSPC" Error

You may see this error when an inotify instance in your system reaches its limit. Inotify is used to monitor directory and file changes. You may encounter this error when your application uses inotify instances that may exceed system limits.

Workaround:

To resolve this error, edit the following file:

sudo nano /etc/sysctl.conf

and add the following line at the bottom of the file:

fs.inotify.max_user_watches=524288

Save and close document. Then run the following command for the changes to take effect:

sudo sysctl -p

This will increase the inotify instance limit for your system and resolve the ENOSPC error.

Summary

Through these solutions, you can solve some common errors in CentOS Node.js. When you encounter problems using Node.js, refer to this article for a quick solution.

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