diff --git a/docs/site-aliases.md b/docs/site-aliases.md
index e88395e7ad..26191ddbfd 100644
--- a/docs/site-aliases.md
+++ b/docs/site-aliases.md
@@ -75,10 +75,6 @@ drush:
       - /etc/drush/sites
 ```
 
-The command `drush core:init` will automatically configure your
-~/.drush/drush.yml configuration file to add `~/.drush/sites` and
-`/etc/drush/sites` as locations where alias files may be placed.
-
 A canonical alias named _example_ that points to a local
 Drupal site named at http://example.com like this:
 
diff --git a/examples/example.prompt.sh b/examples/example.prompt.sh
index 5e1f69ff17..7b66176fe6 100644
--- a/examples/example.prompt.sh
+++ b/examples/example.prompt.sh
@@ -4,14 +4,13 @@
 #
 # Note: This file does a lot, and is designed for Bash. If you want to show the
 # currently set alias in your prompt, use the first 2 values below as an example.
-# This example can be used directly for the POWERLEVEL9K theme for Oh My Zsh.
+
+# This section can be used for the POWERLEVEL9K theme for Oh My Zsh.
 #FILE="${TMPDIR:-/tmp/}/drush-env-${USER}/drush-drupal-site-$$"
 #POWERLEVEL9K_CUSTOM_DRUSH="[ -r $FILE ] && cat $FILE"
 #POWERLEVEL9K_CUSTOM_DRUSH_BACKGROUND="green"
 #POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context dir vcs custom_drush)
-#
-# Use `drush init` to copy this to ~/.drush/drush.prompt.sh, and source it in
-# ~/.bashrc or ~/.bash_profile.
+
 #
 # Note that your Bash session must already have the __git_ps1 function available.
 # Typically this is provided by git-prompt.sh, see instructions for downloading
diff --git a/src/Commands/core/InitCommands.php b/src/Commands/core/InitCommands.php
deleted file mode 100644
index 50be3a5a0c..0000000000
--- a/src/Commands/core/InitCommands.php
+++ /dev/null
@@ -1,191 +0,0 @@
-<?php
-namespace Drush\Commands\core;
-
-use Consolidation\SiteProcess\Util\Escape;
-use Drush\Drush;
-use Drush\Commands\DrushCommands;
-use Drush\Exceptions\UserAbortException;
-use Drush\Exec\ExecTrait;
-use Drush\Log\LogLevel;
-use Robo\LoadAllTasks;
-use Robo\Contract\IOAwareInterface;
-use Robo\Contract\BuilderAwareInterface;
-
-class InitCommands extends DrushCommands implements BuilderAwareInterface, IOAwareInterface
-{
-    use LoadAllTasks;
-    use ExecTrait;
-
-    /**
-     * Enrich the bash startup file with bash aliases and a smart command prompt.
-     *
-     * @command core:init
-     *
-     * @option $edit Open the new config file in an editor.
-     * @option $add-path Always add Drush to the $PATH in the user's .bashrc
-     *   file, even if it is already in the $PATH. Use --no-add-path to skip
-     *   updating .bashrc with the Drush $PATH. Default is to update .bashrc
-     *   only if Drush is not already in the $PATH.
-     * @optionset_get_editor
-     * @aliases init,core-init
-     * @usage core-init --edit
-     *   Enrich Bash and open drush config file in editor.
-     * @usage core-init --edit --bg
-     *   Return to shell prompt as soon as the editor window opens
-     */
-    public function initializeDrush($options = ['edit' => false, 'add-path' => ''])
-    {
-        $home = $this->getConfig()->home();
-        $drush_config_dir = $home . "/.drush";
-        $drush_config_file = $drush_config_dir . "/drush.yml";
-        $drush_bashrc = $drush_config_dir . "/drush.bashrc";
-        $drush_prompt = $drush_config_dir . "/drush.prompt.sh";
-        $examples_dir = DRUSH_BASE_PATH . "/examples";
-        $example_configuration = $examples_dir . "/example.drush.yml";
-        $example_bashrc = $examples_dir . "/example.bashrc";
-        $example_prompt = $examples_dir . "/example.prompt.sh";
-
-        /**
-         * That's right. Robo collections and tasks are usable in Drush.
-         */
-        $collection = $this->collectionBuilder();
-
-        // Create a ~/.drush directory if it does not yet exist
-        $collection->taskFilesystemStack()->mkdir($drush_config_dir);
-
-        // If there is no ~/.drush/drush.yml, copy example there.
-        if (!is_file($drush_config_file)) {
-            $collection->taskWriteToFile($drush_config_file)->textFromFile($example_configuration);
-            $collection->progressMessage('Copied example.drush.yml to {path}', ['path' => $drush_config_file], LogLevel::OK);
-            $this->logger()->notice('Copied drush.yml to ' . $drush_config_file);
-        } else {
-            $this->logger()->debug($drush_config_file . ' already exists. Skip copy.');
-        }
-
-        // Decide whether we want to add our Bash commands to
-        // ~/.bashrc or ~/.bash_profile, and create a task to
-        // update it with includes of the various files we write,
-        // as needed.  If it is, then we will add it to the collection.
-        $bashrc = $this->findBashrc($home);
-        $taskUpdateBashrc = $this->taskWriteToFile($bashrc)->append();
-
-        // List of Drush bash configuration files, and
-        // their source templates.
-        $drushBashFiles = [
-            $drush_bashrc => $example_bashrc,
-            $drush_prompt => $example_prompt,
-        ];
-
-        // Mapping from Drush bash configuration files
-        // to a description of what each one is.
-        $drushBashFileDescriptions = [
-            $drush_bashrc => 'Drush bash customizations',
-            $drush_prompt => 'Drush prompt customizations',
-        ];
-
-        foreach ($drushBashFiles as $destFile => $sourceFile) {
-            // If the destination file does not exist, then
-            // copy the example file there.
-            if (!is_file($destFile)) {
-                $collection->taskWriteToFile($destFile)->textFromFile($sourceFile);
-                $description = $drushBashFileDescriptions[$destFile];
-                $collection->progressMessage('Copied {description} to {path}', ['description' => $description, 'path' => $destFile], LogLevel::OK);
-                $pattern = basename($destFile);
-                $taskUpdateBashrc->appendUnlessMatches("#$pattern#", "\n# Include $description.". $this->bashAddition($destFile));
-            }
-        }
-
-        // If Drush is not in the $PATH, then figure out which
-        // path to add so that Drush can be found globally.
-        $add_path = $options['add-path'];
-        if ((!self::programExists('drush') || $add_path) && ($add_path !== false)) {
-            $drush_path = $this->findPathToDrush();
-            $drush_path = preg_replace("%^" . preg_quote($home) . "/%", '$HOME/', $drush_path);
-            $pattern = "$drush_path";
-            $taskUpdateBashrc->appendUnlessMatches("#$pattern#", "\n# Path to Drush, added by 'drush init'.\nexport PATH=\"\$PATH:$drush_path\"\n\n");
-        }
-
-        $openEditor = false;
-        if ($taskUpdateBashrc->wouldChange()) {
-            if ($this->io()->confirm(dt("Modify !file to include Drush configuration files?", ['!file' => $bashrc]))) {
-                $collection->addTask($taskUpdateBashrc);
-                $collection->progressMessage('Updated bash configuration file {path}', ['path' => $bashrc], LogLevel::OK);
-                $collection->progressMessage('Start a new shell in order to experience the improvements (e.g. `{shell}`).', ['shell' => 'bash'], LogLevel::OK);
-                $openEditor = $options['edit'];
-            } else {
-                throw new UserAbortException();
-            }
-        } else {
-            $collection->progressMessage('No code added to {path}', ['path' => $bashrc]);
-        }
-        $result = $collection->run();
-
-        if ($result->wasSuccessful() && $openEditor) {
-            $editor = self::getEditor();
-            // A bit awkward due to backward compat.
-            $cmd = sprintf($editor, Escape::shellArg($drush_config_file));
-            $process = $this->processManager()->shell($cmd);
-            $process->setTty(true);
-            $process->mustRun();
-        }
-
-        return $result;
-    }
-
-    /**
-     * Determine which .bashrc file is best to use on this platform.
-     */
-    protected function findBashrc($home)
-    {
-        # Set a default value in case nothing else exists.
-        $file = $home . '/.bashrc';
-
-        if (!empty($_ENV['SHELL']) && strstr($_ENV['SHELL'], 'zsh')) {
-            $file = $home . '/.zshrc';
-        } elseif (file_exists($home . '/.bash_profile')) {
-            $file = $home . '/.bash_profile';
-        } elseif (file_exists($home . '/.bashrc')) {
-            $file = $home . '/.bashrc';
-        } elseif (file_exists($home . '/.profile')) {
-            $file = $home . '/.profile';
-        } elseif (file_exists($home . '/.functions')) {
-            $file = $home . '/.functions';
-        }
-
-        return $file;
-    }
-
-    /**
-     * Determine where Drush is located, so that we can add
-     * that location to the $PATH.
-     */
-    protected function findPathToDrush()
-    {
-        // First test: is Drush inside a vendor directory?
-        // Does vendor/bin exist?  If so, use that.  We do
-        // not have a good way to locate the 'bin' directory
-        // if it has been relocated in the composer.json config
-        // section.
-        if ($vendor_pos = strpos(DRUSH_BASE_PATH, "/vendor/")) {
-            $vendor_dir = substr(DRUSH_BASE_PATH, 0, $vendor_pos + 7);
-            $vendor_bin = $vendor_dir . '/bin';
-            if (is_dir($vendor_bin)) {
-                return $vendor_bin;
-            }
-        }
-
-        // Fallback is to use the directory that Drush is in.
-        return DRUSH_BASE_PATH;
-    }
-
-    protected function bashAddition($file)
-    {
-        return <<<EOD
-
-if [ -f "$file" ] ; then
-  source $file
-fi
-
-EOD;
-    }
-}
diff --git a/tests/functional/InitCommandTest.php b/tests/functional/InitCommandTest.php
deleted file mode 100644
index 578d73827e..0000000000
--- a/tests/functional/InitCommandTest.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-namespace Unish;
-
-use Webmozart\PathUtil\Path;
-
-/**
- *  Test to see if the `drush init` command does the
- *  setup that it is supposed to do.
- *
- *  @group base
- */
-class InitCommandCase extends CommandUnishTestCase
-{
-
-    public function testInitCommand()
-    {
-        // Call `drush core-init`
-        $this->drush('core-init', [], ['add-path' => true, 'yes' => null, 'no-ansi' => null]);
-        $logOutput = $this->getErrorOutput();
-        // First test to ensure that the command claimed to have made the expected progress
-        $this->assertStringContainsString("Copied Drush bash customizations", $logOutput);
-        $this->assertStringContainsString("Updated bash configuration file", $logOutput);
-
-        // Next we test to see if there is evidence that those operations worked.
-        $home = Path::join($this->getSandbox(), 'home');
-        $this->assertFileExists("$home/.drush/drush.yml", $this->buildProcessMessage());
-        $this->assertFileExists("$home/.drush/drush.bashrc", $this->buildProcessMessage());
-        $this->assertFileExists("$home/.bashrc", $this->buildProcessMessage());
-
-        // Check to see if the .bashrc file sources our drush.bashrc file,
-        // and whether it adds the path to self::getDrush() to the $PATH
-        $bashrc_contents = file_get_contents("$home/.bashrc");
-        $this->assertStringContainsString('drush.bashrc', $bashrc_contents);
-
-        $this->assertStringContainsString(Path::canonicalize(realpath(dirname(self::getDrush()))), $bashrc_contents);
-    }
-}