What does npm mean in linux?

In Linux, npm is a package management tool installed along with nodejs. Its main function is to manage node packages, including: installation, uninstallation, update, viewing, etc.; it allows users to download the written third file from the npm server. Third-party packages are used locally.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What does npm mean in linux

NPM is a package management tool installed along with NodeJS. It can solve many problems in NodeJS code deployment. Common usage scenarios include the following:

• Allows users to download third-party packages written by others from the NPM server for local use.

• Allows users to download and install command line programs written by others from the NPM server for local use.

• Allows users to upload packages or command line programs they write to the NPM server for others to use.

Since the new version of nodejs has integrated npm, npm has also been installed before. You can also test whether the installation is successful by entering "npm -v". The command is as follows. A version prompt appears to indicate a successful installation:

$ npm -v
2.3.0

If you are installing an old version of npm, you can easily upgrade it through the npm command. The command is as follows:

$ sudo npm install npm -g
/usr/local/bin/npm -> /usr/local/lib/node_modules/npm/bin/npm-cli.js
npm@2.14.2 /usr/local/lib/node_modules/npm

NPM (node package manager), often called the node package manager. As the name suggests, its main function is to manage node packages, including: installation, uninstallation, update, view, search, release, etc.

Behind npm is a database based on couchdb, which records the information of each package in detail, including author, version, dependencies, authorization information, etc. One of its very important functions is to free developers from tedious package management work (versions, dependencies, etc.) and focus more on functional development.

npm install Install the dependency package of nodejs

For example, npm install express will install the latest version of express by default. You can also install the specified version by adding the version number after it. For example, npm install express@3.0.6

npm install -g installs the package into the global environment

But in the code, there is no way to call it directly through require() For globally installed packages. The global installation is for command line use. Just like after installing vmarket globally, you can directly run the vm command in the command line

npm install --save While installing, write the information Enter package.json

If there is a package.json file in the project path, you can directly use the npm install method to install all dependency packages according to the dependencies configuration

In this way, when the code is submitted to github, There is no need to submit the node_modules folder.

npm init will guide you to create a package.json file, including name, version, author information, etc.

npm remove remove

npm update < ;name>Update

npm ls List all currently installed packages

npm root View the installation path of the current package

npm root -g View the global package installation Path

npm help Help, if you want to view the help of the install command separately, you can use npm help install

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