Getting nodejs v12

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  • sudo apt -y install curl dirmngr apt-transport-https lsb-release ca-certificates
  • curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -

Installing the NodeSource Node.js repo finishes with:


    1. Run `sudo apt-get install -y nodejs` to install Node.js 12.x and npm
## You may also need development tools to build native addons:
     sudo apt-get install gcc g++ make
## To install the Yarn package manager, run:
     curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/yarnkey.gpg >/dev/null
     echo "deb [signed-by=/usr/share/keyrings/yarnkey.gpg] https://dl.yarnpkg.com/debian stable main" | sudo tee 
/etc/apt/sources.list.d/yarn.list
     sudo apt-get update && sudo apt-get install yarn

Installing nodejs now automatically installs npm.

(Debian gets v7.5.2, Ubuntu gets v6.14.15)

attempting to install npm (on Debian)now causes:

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libnode72 : Conflicts: nodejs-legacy
 nodejs : Conflicts: npm
E: Unable to correct problems, you have held broken packages.

attempting to install npm (on Ubuntu)now causes:


Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 npm : Depends: nodejs (>= 6.11~)
      Depends: node-abbrev (>= 1.1.1~) but it is not going to be installed
      Depends: node-ajv but it is not going to be installed
      Depends: node-ansi but it is not going to be installed
      Depends: node-ansi-regex (>= 3.0~) but it is not going to be installed
      Depends: node-ansi-styles but it is not going to be installed
      Depends: node-ansistyles but it is not going to be installed
      Depends: node-aproba but it is not going to be installed
      Depends: node-archy (>= 1.0~) but it is not going to be installed
      Depends: node-are-we-there-yet but it is not going to be installed
      Depends: node-asap but it is not going to be installed
      Depends: node-asn1 but it is not going to be installed
      Depends: node-assert-plus but it is not going to be installed
      Depends: node-asynckit but it is not going to be installed
      Depends: node-aws4 but it is not going to be installed
      Depends: node-aws-sign2 but it is not going to be installed
      Depends: node-balanced-match but it is not going to be installed
      Depends: node-bcrypt-pbkdf but it is not going to be installed
      Depends: node-bl but it is not going to be installed
      Depends: node-bluebird but it is not going to be installed
      Depends: node-boxen but it is not going to be installed
      Depends: node-brace-expansion but it is not going to be installed
      Depends: node-builtin-modules but it is not going to be installed
      Depends: node-builtins but it is not going to be installed
      Depends: node-cacache but it is not going to be installed
      Depends: node-call-limit but it is not going to be installed
      Depends: node-camelcase but it is not going to be installed
      Depends: node-caseless but it is not going to be installed
      Depends: node-chalk but it is not going to be installed
      Depends: node-chownr but it is not going to be installed
      Depends: node-ci-info but it is not going to be installed
      Depends: node-cli-boxes but it is not going to be installed
      Depends: node-cliui but it is not going to be installed
      Depends: node-clone but it is not going to be installed
      Depends: node-co but it is not going to be installed
      Depends: node-color-convert but it is not going to be installed
      Depends: node-color-name but it is not going to be installed
      Depends: node-colors but it is not going to be installed
      Depends: node-columnify but it is not going to be installed
      Depends: node-combined-stream but it is not going to be installed
      Depends: node-concat-map but it is not going to be installed
      Depends: node-concat-stream but it is not going to be installed
      Depends: node-config-chain but it is not going to be installed
      Depends: node-configstore but it is not going to be installed
      Depends: node-console-control-strings but it is not going to be installed
      Depends: node-copy-concurrently but it is not going to be installed
      Depends: node-core-util-is but it is not going to be installed
      Depends: node-cross-spawn but it is not going to be installed
      Depends: node-crypto-random-string but it is not going to be installed
      Depends: node-cyclist but it is not going to be installed
      Depends: node-dashdash but it is not going to be installed
      Depends: node-debug but it is not going to be installed
      Depends: node-decamelize but it is not going to be installed
      Depends: node-deep-extend but it is not going to be installed
      Depends: node-defaults but it is not going to be installed
      Depends: node-define-properties but it is not going to be installed
      Depends: node-delayed-stream but it is not going to be installed
      Depends: node-delegates but it is not going to be installed
      Depends: node-detect-indent but it is not going to be installed
      Depends: node-detect-newline but it is not going to be installed
      Depends: node-dot-prop but it is not going to be installed
      Depends: node-duplexer3 but it is not going to be installed
      Depends: node-duplexify but it is not going to be installed
      Depends: node-ecc-jsbn but it is not going to be installed
      Depends: node-editor but it is not going to be installed
      Depends: node-encoding but it is not going to be installed
      Depends: node-end-of-stream but it is not going to be installed
      Depends: node-err-code but it is not going to be installed
      Depends: node-errno but it is not going to be installed
      Depends: node-es6-promise but it is not going to be installed
      Depends: node-escape-string-regexp but it is not going to be installed
      Depends: node-execa but it is not going to be installed
      Depends: node-extend but it is not going to be installed
      Depends: node-extsprintf but it is not going to be installed
      Depends: node-fast-deep-equal but it is not going to be installed
      Depends: node-find-up but it is not going to be installed
      Depends: node-flush-write-stream but it is not going to be installed
      Depends: node-forever-agent but it is not going to be installed
      Depends: node-form-data but it is not going to be installed
      Depends: node-from2 but it is not going to be installed
      Depends: node-fs.realpath but it is not going to be installed
      Depends: node-fs-vacuum but it is not going to be installed
      Depends: node-fs-write-stream-atomic but it is not going to be installed
      Depends: node-function-bind but it is not going to be installed
      Depends: node-gauge but it is not going to be installed
      Depends: node-genfun but it is not going to be installed
      Depends: node-get-caller-file but it is not going to be installed
      Depends: node-getpass but it is not going to be installed
      Depends: node-glob (>= 7.1.2~) but it is not going to be installed
      Depends: node-got but it is not going to be installed
      Depends: node-graceful-fs (>= 4.1.11~) but it is not going to be installed
      Depends: node-gyp (>= 3.6.2~) but it is not going to be installed
      Depends: node-har-schema but it is not going to be installed
      Depends: node-har-validator but it is not going to be installed
      Depends: node-has-flag but it is not going to be installed
      Depends: node-has-unicode but it is not going to be installed
      Depends: node-hosted-git-info (>= 2.6~) but it is not going to be installed
      Depends: node-http-signature but it is not going to be installed
      Depends: node-iconv-lite but it is not going to be installed
      Depends: node-iferr but it is not going to be installed
      Depends: node-import-lazy but it is not going to be installed
      Depends: node-imurmurhash but it is not going to be installed
      Depends: node-inflight but it is not going to be installed
      Depends: node-inherits (>= 2.0.3~) but it is not going to be installed
      Depends: node-ini (>= 1.3.5~) but it is not going to be installed
      Depends: node-invert-kv but it is not going to be installed
      Depends: node-ip but it is not going to be installed
      Depends: node-ip-regex but it is not going to be installed
      Depends: node-isarray but it is not going to be installed
      Depends: node-isexe but it is not going to be installed
      Depends: node-is-npm but it is not going to be installed
      Depends: node-is-obj but it is not going to be installed
      Depends: node-is-path-inside but it is not going to be installed
      Depends: node-is-retry-allowed but it is not going to be installed
      Depends: node-is-stream but it is not going to be installed
      Depends: node-isstream but it is not going to be installed
      Depends: node-is-typedarray but it is not going to be installed
      Depends: node-jsbn but it is not going to be installed
      Depends: node-jsonparse but it is not going to be installed
      Depends: node-json-parse-better-errors but it is not going to be installed
      Depends: node-json-schema but it is not going to be installed
      Depends: node-json-schema-traverse but it is not going to be installed
      Depends: node-jsonstream (>= 1.3.2~) but it is not going to be installed
      Depends: node-json-stringify-safe but it is not going to be installed
      Depends: node-jsprim but it is not going to be installed
      Depends: node-latest-version but it is not going to be installed
      Depends: node-lazy-property but it is not going to be installed
      Depends: node-lcid but it is not going to be installed
      Depends: node-libnpx but it is not going to be installed
      Depends: node-locate-path but it is not going to be installed
      Depends: node-lodash but it is not going to be installed
      Depends: node-lockfile (>= 1.0.3~) but it is not going to be installed
      Depends: node-lowercase-keys but it is not going to be installed
      Depends: node-lru-cache (>= 4.1.1~) but it is not going to be installed
      Depends: node-make-dir but it is not going to be installed
      Depends: node-mem but it is not going to be installed
      Depends: node-mime but it is not going to be installed
      Depends: node-mime-types but it is not going to be installed
      Depends: node-mimic-fn but it is not going to be installed
      Depends: node-minimatch but it is not going to be installed
      Depends: node-minimist but it is not going to be installed
      Depends: node-mississippi but it is not going to be installed
      Depends: node-mkdirp (>= 0.5.1~) but it is not going to be installed
      Depends: node-move-concurrently but it is not going to be installed
      Depends: node-ms but it is not going to be installed
      Depends: node-mute-stream but it is not going to be installed
      Depends: node-nopt but it is not going to be installed
      Depends: node-normalize-package-data (>= 2.4~) but it is not going to be installed
      Depends: node-npm-bundled but it is not going to be installed
      Depends: node-npm-package-arg (>= 6.1.1) but it is not going to be installed
      Depends: node-npmlog (>= 4.1.2~) but it is not going to be installed
      Depends: node-number-is-nan but it is not going to be installed
      Depends: node-oauth-sign but it is not going to be installed
      Depends: node-object-assign but it is not going to be installed
      Depends: node-once (>= 1.4~) but it is not going to be installed
      Depends: node-opener but it is not going to be installed
      Depends: node-osenv (>= 0.1.5~) but it is not going to be installed
      Depends: node-os-locale but it is not going to be installed
      Depends: node-os-tmpdir but it is not going to be installed
      Depends: node-package-json but it is not going to be installed
      Depends: node-parallel-transform but it is not going to be installed
      Depends: node-path-exists but it is not going to be installed
      Depends: node-path-is-absolute but it is not going to be installed
      Depends: node-path-is-inside but it is not going to be installed
      Depends: node-promise-inflight but it is not going to be installed
      Depends: node-promise-retry but it is not going to be installed
      Depends: node-promzard but it is not going to be installed
      Depends: node-performance-now but it is not going to be installed
      Depends: node-p-finally but it is not going to be installed
      Depends: node-p-is-promise but it is not going to be installed
      Depends: node-pify but it is not going to be installed
      Depends: node-p-limit but it is not going to be installed
      Depends: node-p-locate but it is not going to be installed
      Depends: node-prepend-http but it is not going to be installed
      Depends: node-process-nextick-args but it is not going to be installed
      Depends: node-proto-list but it is not going to be installed
      Depends: node-prr but it is not going to be installed
      Depends: node-pseudomap but it is not going to be installed
      Depends: node-psl but it is not going to be installed
      Depends: node-pump but it is not going to be installed
      Depends: node-pumpify but it is not going to be installed
      Depends: node-punycode but it is not going to be installed
      Depends: node-qs but it is not going to be installed
      Depends: node-qw but it is not going to be installed
      Depends: node-rc but it is not going to be installed
      Depends: node-read (>= 1.0.7~) but it is not going to be installed
      Depends: node-readable-stream but it is not going to be installed
      Depends: node-read-package-json (>= 2.0.13~) but it is not going to be installed
      Depends: node-registry-auth-token but it is not going to be installed
      Depends: node-registry-url but it is not going to be installed
      Depends: node-request (>= 2.83~) but it is not going to be installed
      Depends: node-require-main-filename but it is not going to be installed
      Depends: node-require-directory but it is not going to be installed
      Depends: node-resolve-from (>= 4.0~) but it is not going to be installed
      Depends: node-retry (>= 0.10.1~) but it is not going to be installed
      Depends: node-rimraf (>= 2.6.2~) but it is not going to be installed
      Depends: node-run-queue but it is not going to be installed
      Depends: node-safe-buffer but it is not going to be installed
      Depends: node-semver (>= 5.5~) but it is not going to be installed
      Depends: node-set-blocking but it is not going to be installed
      Depends: node-sha (>= 2.0.1~) but it is not going to be installed
      Depends: node-shebang-command but it is not going to be installed
      Depends: node-shebang-regex but it is not going to be installed
      Depends: node-signal-exit but it is not going to be installed
      Depends: node-slide (>= 1.1.6~) but it is not going to be installed
      Depends: node-sorted-object but it is not going to be installed
      Depends: node-slash but it is not going to be installed
      Depends: node-semver-diff but it is not going to be installed
      Depends: node-spdx-correct but it is not going to be installed
      Depends: node-spdx-exceptions but it is not going to be installed
      Depends: node-spdx-expression-parse but it is not going to be installed
      Depends: node-spdx-license-ids but it is not going to be installed
      Depends: node-sshpk but it is not going to be installed
      Depends: node-ssri but it is not going to be installed
      Depends: node-stream-each but it is not going to be installed
      Depends: node-stream-iterate but it is not going to be installed
      Depends: node-stream-shift but it is not going to be installed
      Depends: node-strict-uri-encode but it is not going to be installed
      Depends: node-string-decoder but it is not going to be installed
      Depends: node-string-width but it is not going to be installed
      Depends: node-strip-ansi (>= 4.0~) but it is not going to be installed
      Depends: node-strip-json-comments but it is not going to be installed
      Depends: node-strip-eof but it is not going to be installed
      Depends: node-supports-color but it is not going to be installed
      Depends: node-tar (>= 4.4~) but it is not going to be installed
      Depends: node-term-size but it is not going to be installed
      Depends: node-text-table but it is not going to be installed
      Depends: node-through but it is not going to be installed
      Depends: node-through2 but it is not going to be installed
      Depends: node-timed-out but it is not going to be installed
      Depends: node-tough-cookie but it is not going to be installed
      Depends: node-tunnel-agent but it is not going to be installed
      Depends: node-tweetnacl but it is not going to be installed
      Depends: node-typedarray but it is not going to be installed
      Depends: node-uid-number but it is not going to be installed
      Depends: node-unique-filename but it is not going to be installed
      Depends: node-unique-string but it is not going to be installed
      Depends: node-unpipe but it is not going to be installed
      Depends: node-url-parse-lax but it is not going to be installed
      Depends: node-util-deprecate but it is not going to be installed
      Depends: node-uuid but it is not going to be installed
      Depends: node-validate-npm-package-name but it is not going to be installed
      Depends: node-verror but it is not going to be installed
      Depends: node-which (>= 1.3~) but it is not going to be installed
      Depends: node-which-module but it is not going to be installed
      Depends: node-wide-align but it is not going to be installed
      Depends: node-widest-line but it is not going to be installed
      Depends: node-wrap-ansi but it is not going to be installed
      Depends: node-wrappy but it is not going to be installed
      Depends: node-wcwidth.js but it is not going to be installed
      Depends: node-write-file-atomic but it is not going to be installed
      Depends: node-xdg-basedir but it is not going to be installed
      Depends: node-xtend but it is not going to be installed
      Depends: node-yargs but it is not going to be installed
      Depends: node-yargs-parser but it is not going to be installed
      Depends: node-yallist but it is not going to be installed
      Depends: node-y18n but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

(Let's see what happens if I don't try to fix this...)

installing build-essential installs gcc g++ & make for you... & does a better job of it...

The Yarn package manager is a new thing. hhhmmm... No clue what it's actually for.