npm pack
), which created a tarball. I have then copied that file with my project and tried to install it on the test machine globally like this: npm install -g node-windows-0.1.5.tgz
Error: Cannot find module 'node-windows'
npm list -g
) it is clearly there in the list..bundledDependencies
(docs on npm).npm install
to install your node files before packing. npm pack
.npm install <filename>
.npm link
command (docs on npm link): The long dark old bear locations.cd yourAppFolder
npm link node-windows
npm pack
npm i -g [module name]-x.y.z.tgz
in offline systempackage.json
to manage a project’s dependencies. If you’re more of a video person, why not sign up for SitePoint Premium and watch our free screencast: What is npm and How Can I Use It?.node_modules
folder in your parent working directory. This location is owned by the current user. Global packages are installed in {prefix}/lib/node_modules/
which is owned by root (where {prefix}
is usually /usr/
or /usr/local
). This means you would have to use sudo
to install packages globally, which could cause permission errors when resolving third-party dependencies, as well as being a security concern. Lets change that:npm config
gives us..npmrc
file in our home directory..node_modules_global/bin
to our $PATH
environment variable, so that we can run global packages from the command line. Do this by appending the following line to your .profile
, .bash_profile
or .bashrc
and restarting your terminal..node_modules_global/bin
will be found first and the correct version of npm will be used.--global
flag, but this can be abbreviated to -g
.npm list
command.--depth=0
option.example.js
into example.min.js
:package.json
file. Let’s go ahead and create one.yes
to confirm. This will create a package.json
file at the root of the project.package.json
file use npm init --y
main
and scripts
. The main
field is the primary entry point to your program and the scripts
field lets you specify script commands that are run at various times in the lifecycle of your package. We can leave these as they are for now, but if you’d like to find out more, see the package.json documentation on npm and this article on using npm as a build tool.package.json
we will see that a dependencies
field has been added:^
) at the front of the version number indicates that when installing, npm will pull in the highest version of the package it can find where the only the major version has to match (unless a package-lock.json
file is present). In our case, that would be anything below v2.0.0. This method of versioning dependencies (major.minor.patch) is known as semantic versioning. You can read more about it here: Semantic Versioning: Why You Should Be Using it.dependencies
field. This has become the default in the latest version of npm and is used for packages (like Underscore) required for the application to run. It would also be possible to save a package as a devDependency
by specifying a --save-dev
flag. devDependencies
are packages used for development purposes, for example for running tests or transpiling code.private: true
to package.json
to prevent accidental publication of private repositories as well as suppressing any warnings generated when running npm install
.package.json
to specify a project’s dependencies is portability. For example, when you clone someone else’s code, all you have to do is run npm i
in the project root and npm will resolve and fetch all of the necessary packages for you to run the app. We’ll look at this in more detail later.test.js
in the project root and add the following:node test.js
and you should see [0, 1, 2, 3, 4]
output to the screen.package-lock.json
file from earlier? Introduced in npm v5, the purpose of this file is to ensure that the dependencies remain the same on all machines the project is installed on. It is automatically generated for any operations where npm modifies either the node_modules
folder, or package.json
file.node_modules
folder, then re-run npm i
. The latest version of npm will install Underscore v11.9.0 (as this is what is specified in the package-lock.json
file). Earlier versions will pull in v1.9.1 due to the rules of semantic versioning. In the past inconsistent package versions have proven a big headache for developers. This was normally solved by using an npm-shrinkwrap.json
file which had to be manually created.package.json
. We can also execute npm update
if we have many outdated modules we want to update.mkdir
command a couple of times in this tutorial. Is there a node package that does the same? Let’s use npm search
.mkdir.js
and copy-paste this code:package.json
.npm install request --save
to save the dependency in package.json
. If you wanted to install a package without saving it in package.json
, just use --no-save
argument.node_modules
folder first then execute npm install
node_modules
folder, you’ll see that it gets recreated again. This way, you can easily share your code with others without bloating your project and source repositories with dependencies..npm
directory in your home path.node_module
folders from your workspace if you have multiple node projects on your system you want to clean up.express
.npm audit
to view more details.express > accepts > negotiator
means Express depends on the package Accepts
. The package Accepts
depends on the the package negotiator
which contains the vulnerability.npm install [email protected]
as suggested, or run npm audit fix
. Let’s do the latter:npm audit fix
simply upgraded the affected packages to the latest versions. However, do note that not all vulnerabilities can be fixed automatically. This could happen if you are using a package that underwent a major change which could break your current project if updated. For situations such as this, you will have to review your code and do the update manually.npm audit fix --force
if you don’t mind upgrading packages with breaking changes. After you have executed the command, run npm audit
to ensure that all vulnerabilities have been resolved.npm i <package>
– install local packagenpm i -g </package><package>
– install global packagenpm un </package><package>
– uninstall local packagenpm up
– npm update packagesnpm t
– run testsnpm ls
– list installed modulesnpm ll
or npm la
– print additional package information while listing modulesnpm help
for the full list. You can also learn more in our article 10 Tips and Tricks That Will Make You an npm Ninja.sudo
) and how to install packages in local and global mode. I also covered deleting, updating and installing a certain version of a package, as well as managing a project’s dependencies. If you would to learn more about the new features in the latest releases, you can visit the npm Github releases page.C:Program Filesnodejs
PATH
and choose to edit it.empty
, change it to this: C:Users{YOUR USERNAME HERE}AppDataRoamingnpm;C:Program Filesnodejs
C:Users{YOUR USERNAME HERE}AppDataRoamingnpm
, append the following right after: ;C:Program Filesnodejs
;C:Users{YOUR USERNAME HERE}AppDataRoamingnpm;C:Program Filesnodejs
PATH
variables instead:PATH
would look like:sar
is a monitoring utility mostly native to Linux. But with SUSE Linux you can not find sar
pre-installed. There you will see error like one below :2 4 | root@kerneltalks# sar If'sar'isnotatypo you can usecommand-not-found tolookup the packagethat contains it,like this: |
sar
available on SUSE, you need to install package named sysstat
. If you have zypper repo configured then you can directly run below command :2 4 6 8 10 12 14 16 18 20 | root@kerneltalks# zypper in sysstat Refreshing service'SUSE_Linux_Enterprise_Server_12_SP3_x86_64'. Reading installed packages... sysstat 1newpackagetoinstall. Overall download size:358.7KiB.Already cached:0B.After the operation, Continue?[y/n/...?shows all options](y):y (1/1),358.7KiB(1.3MiB unpacked) Retrieving:sysstat-12.0.2-10.15.1.x86_64.rpm..............[done(160.0KiB/s)] Checking forfileconflicts:.............................................[done] (1/1)Installing:sysstat-12.0.2-10.15.1.x86_64..........................[done] |
sysstat
service so that it will start collecting monitoring data in background. Also, enable this service at boot so that after reboot it starts itself and keep on collecting data in background.curl -sL https://deb.nodesource.com/setup_10.x | sudo bash -
curl -sL https://deb.nodesource.com/setup_8.x | sudo bash -
sudo apt install nodejs
node http_server.js