Cordova platform add android

After so many attempts to add platform so that I run my app to test its native aspect on a physical device, I keep getting errors. I've been on this for almost a full day.

ionic cordova platform add android

hangs my system for about 4Hours without any result.

ionic add platform android

says [ERROR] Unable to find command: add platform android

cordova platform add android --save

gives the below error.

Using cordova-fetch for cordova-android@~6.2.2
Error: Failed to fetch platform cordova-android@~6.2.2
Probably this is either a connection problem, or platform spec is incorrect.
Check your connection and platform name/version/URL.
Error: npm: Command failed with exit code 243 Error output:
npm WARN checkPermissions Missing write access to /var/www/example.com/public_html/naice/node_modules
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm ERR! Linux 4.4.0-78-generic
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "install" "cordova-android@~6.2.2" "--save"
npm ERR! node v7.9.0
npm ERR! npm  v4.2.0
npm ERR! path /var/www/example.com/public_html/naice/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access

npm ERR! Error: EACCES: permission denied, access '/var/www/example.com/public_html/naice/node_modules'
npm ERR!  { Error: EACCES: permission denied, access '/var/www/example.com/public_html/naice/node_modules'
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'access',
npm ERR!   path: '/var/www/example.com/public_html/naice/node_modules' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR! Linux 4.4.0-78-generic
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "install" "cordova-android@~6.2.2" "--save"
npm ERR! node v7.9.0
npm ERR! npm  v4.2.0
npm ERR! path /home/bayo/.npm/_logs/2017-06-22T08_18_50_651Z-debug.log.2752372291
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall open

npm ERR! Error: EACCES: permission denied, open '/home/bayo/.npm/_logs/2017-06-22T08_18_50_651Z-debug.log.2752372291'
npm ERR!  { Error: EACCES: permission denied, open '/home/bayo/.npm/_logs/2017-06-22T08_18_50_651Z-debug.log.2752372291'
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'open',
npm ERR!   path: '/home/bayo/.npm/_logs/2017-06-22T08_18_50_651Z-debug.log.2752372291' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! Please include the following file with any support request:
npm ERR!     /home/bayo/.npm/_logs/2017-06-22T08_18_50_651Z-debug.log

Ionic info

global packages:

    @ionic/cli-utils : 1.4.0
    Cordova CLI      : 7.0.1
    Ionic CLI        : 3.4.0

local packages:

    @ionic/app-scripts              : 1.3.7
    @ionic/cli-plugin-cordova       : 1.4.0
    @ionic/cli-plugin-ionic-angular : 1.3.1
    Cordova Platforms               : none
    Ionic Framework                 : ionic-angular 3.3.0

System:

    Node       : v7.9.0
    OS         : Linux 4.4
    Xcode      : not installed
    ios-deploy : not installed
    ios-sim    : not installed
    npm        : 4.2.0

I have tested my connection and all is good.

Kindly help!