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Install Node.js and PM2 in CentOS 7

Learn how to install Node.js, npm and pm2 in CentOS 7. If you are using DigitalOcean droplet with CentOS Linux distribution, you might want to learn this.

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Install Node.js 12.x

Add node.js packages to rpm

curl -sL https://rpm.nodesource.com/setup_10.x | sudo bash -

Output

## Installing the NodeSource Node.js 12.x repo...


## Inspecting system...

+ rpm -q --whatprovides redhat-release || rpm -q --whatprovides centos-release || rpm -q --whatprovides cloudlinux-release || rpm -q --whatprovides sl-release
+ uname -m

## Confirming "el7-x86_64" is supported...

+ curl -sLf -o /dev/null 'https://rpm.nodesource.com/pub_12.x/el/7/x86_64/nodesource-release-el7-1.noarch.rpm'

## Downloading release setup RPM...

+ mktemp
+ curl -sL -o '/tmp/tmp.5fD9bJcIbW' 'https://rpm.nodesource.com/pub_12.x/el/7/x86_64/nodesource-release-el7-1.noarch.rpm'

## Installing release setup RPM...

+ rpm -i --nosignature --force '/tmp/tmp.5fD9bJcIbW'

## Cleaning up...

+ rm -f '/tmp/tmp.5fD9bJcIbW'

## Checking for existing installations...

+ rpm -qa 'node|npm' | grep -v nodesource

## Run `sudo yum install -y nodejs` to install Node.js 12.x and npm.
## You may also need development tools to build native addons:
     sudo yum install gcc-c++ make
## To install the Yarn package manager, run:
     curl -sL https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo
     sudo yum install yarn

Install Node.js using yum

sudo yum install nodejs

Output

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
nodesource                                                                                                                                                                            | 2.5 kB  00:00:00     
nodesource/x86_64/primary_db                                                                                                                                                          |  34 kB  00:00:00     
Resolving Dependencies
--> Running transaction check
---> Package nodejs.x86_64 2:12.16.1-1nodesource will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================================================================
 Package                                     Arch                                        Version                                                       Repository                                       Size
=============================================================================================================================================================================================================
Installing:
 nodejs                                      x86_64                                      2:12.16.1-1nodesource                                         nodesource                                       22 M

Transaction Summary
=============================================================================================================================================================================================================
Install  1 Package

Total download size: 22 M
Installed size: 66 M
Is this ok [y/d/N]: y
Downloading packages:
warning: /var/cache/yum/x86_64/7/nodesource/packages/nodejs-12.16.1-1nodesource.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 34fa74dd: NOKEY=====-                   ] 3.7 MB/s |  16 MB  00:00:01 ETA 
Public key for nodejs-12.16.1-1nodesource.x86_64.rpm is not installed
nodejs-12.16.1-1nodesource.x86_64.rpm                                                                                                                                                 |  22 MB  00:00:02     
Retrieving key from file:///etc/pki/rpm-gpg/NODESOURCE-GPG-SIGNING-KEY-EL
Importing GPG key 0x34FA74DD:
 Userid     : "NodeSource <gpg-rpm@nodesource.com>"
 Fingerprint: 2e55 207a 95d9 944b 0cc9 3261 5ddb e8d4 34fa 74dd
 Package    : nodesource-release-el7-1.noarch (installed)
 From       : /etc/pki/rpm-gpg/NODESOURCE-GPG-SIGNING-KEY-EL
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
  Installing : 2:nodejs-12.16.1-1nodesource.x86_64                                                                                                                                                       1/1 
  Verifying  : 2:nodejs-12.16.1-1nodesource.x86_64                                                                                                                                                       1/1 

Installed:
  nodejs.x86_64 2:12.16.1-1nodesource

You can check the version of the node and npm with the following commands.

$ node --version
v12.16.1
$ npm --version
6.13.4
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Install pm2

sudo npm i -g pm2

Output

/usr/bin/pm2 -> /usr/lib/node_modules/pm2/bin/pm2
/usr/bin/pm2-dev -> /usr/lib/node_modules/pm2/bin/pm2-dev
/usr/bin/pm2-docker -> /usr/lib/node_modules/pm2/bin/pm2-docker
/usr/bin/pm2-runtime -> /usr/lib/node_modules/pm2/bin/pm2-runtime
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@~2.1.2 (node_modules/pm2/node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

+ pm2@4.2.3
added 207 packages from 202 contributors in 13.275s

Check the version of pm2 with the following command.

$ pm2 -v
4.2.3

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