$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

Step-by-step – Dart Installation in Ubuntu 20.04 Guide

April 30, 2021 | By the+gnu+linux+evangelist.

Installing

  1. 2. Enabling Dart Repository

    Add Dart Repository for Ubuntu GNU/Linux

    Enabling Dart SDK Repo for Ubuntu
  2. 3. Installing Dart

    Then to Install Dart in Ubuntu
    Simply run:

    sudo apt install dart

    Authenticate with the User’s Admin Pass.
    If Got “User is Not in Sudoers file” then see: How to Enable sudo.

  3. 4. Amending User’s Path

    Again Append Dart Binaries into the Path
    So to append it to the Bash Configuratio File execute:

    echo 'export PATH="$PATH:/usr/lib/dart/bin"' >> ~/.bashrc

    Next Reload the Bash Path simply with:

    bash

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