node-cmd | Simple commandline interface to allow you to run cli | Command Line Interface library

As far as I could see, It seems that you're trying to access an attribute of an object that doesn't exist.

I think the property/attribute message.author is null.

You are using discord.js v11, so you can't use MessageEmbed() and have to use RichEmbed()!

In npm install reads package.json to create a list of dependencies and uses package-lock.json to inform which versions of these dependencies to install. If a dependency is not in package-lock.json it will be added by npm install.

npm ci (named after Continuous Integration) installs dependencies directly from package-lock.json and uses package.json only to validate that there are no mismatched versions. If any dependencies are missing or have incompatible versions, it will throw an error. Check here

Instead of using npm install You can use the npm ci

I would like to use a Powershell because I already have a command to get files with sorting using modify date. Using Node.js it is some harder to do :/

It doesn't have to be harder. You can fetch the filenames using fs.readdir, then fetch the modification date using fs.stat, then sort on the modification date, then extract the filenames, like this:

Instead of using node-cmd you can do something like the following

https://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options

What you want to set is the maxBuffer option.

Example slightly modified:

You can Promisify the callback style functions and use .then to execute them one after another. something like this

As root, you can run: