diff --git a/README.md b/README.md
index 6d681124f..70003d8ef 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,12 @@ brew install pantheon-systems/external/terminus
 
 ### Ubuntu / WinWSL+Ubuntu:
 
-`*** TBD ***`
+```
+# Setup repository
+curl -s https://packagecloud.io/install/repositories/pantheon/public/script.deb.sh | bash
+# Install package
+apt install -y terminus
+```
 
 ### Other installation methods
 
diff --git a/config/constants.yml b/config/constants.yml
index f55f369cb..31736112a 100644
--- a/config/constants.yml
+++ b/config/constants.yml
@@ -54,7 +54,8 @@ TERMINUS_COMMAND_SITE_OPTIONS_REGION: null
 # Package Settings
 TERMINUS_BREW_TAP:               '*** TBD ***'
 TERMINUS_BREW_PACKAGE:           'pantheon-systems/external/terminus'
-TERMINUS_DEBIAN_PACKAGE_INSTALL: '*** TBD ***'
+TERMINUS_DEBIAN_APT_REPO:        'pantheon/public'
+TERMINUS_DEBIAN_PACKAGE_INSTALL: 'apt install -y terminus'
 
 # Testing
 TERMINUS_TEST_MODE:    false
diff --git a/templates/README.twig b/templates/README.twig
index 3546bae7a..a11eff9d9 100644
--- a/templates/README.twig
+++ b/templates/README.twig
@@ -58,7 +58,15 @@ brew install {{ brew_package }}
 
 ### Ubuntu / WinWSL+Ubuntu:
 
-`{{ debian_package_install | raw }}`
+```
+git clone https://github.com/pantheon-systems/terminus \
+    && cd terminus \
+    && git checkout 3.x \
+    && composer install \
+    && composer phar:build \
+    && composer phar:install \
+    && rm -Rf /tmp/terminus
+```
 
 ### Other installation methods