Install icons.

app/app.pro

@@ -20,3 +20,20 @@ RESOURCES += qml/resources.qrc
 target.path += /usr/bin/
 
 INSTALLS += target
+
+# Install icons
+unix {
+    icon32.files = icons/32x32/cool-retro-term.png
+    icon32.path = /usr/share/icons/hicolor/32x32/apps
+    icon64.files = icons/64x64/cool-retro-term.png
+    icon64.path = /usr/share/icons/hicolor/64x64/apps
+    icon128.files = icons/128x128/cool-retro-term.png
+    icon128.path = /usr/share/icons/hicolor/128x128/apps
+    icon256.files = icons/256x256/cool-retro-term.png
+    icon256.path = /usr/share/icons/hicolor/256x256/apps
+
+    pixmap.files = icons/128x128/cool-retro-term.png
+    pixmap.path = /usr/share/pixmaps
+
+    INSTALLS += icon32 icon64 icon128 icon256 pixmap
+}

cool-retro-term.desktop

@@ -2,7 +2,7 @@
 Comment=Use the command line the old way
 Exec=cool-retro-term
 GenericName=Terminal emulator
-Icon=utilities-terminal
+Icon=cool-retro-term
 MimeType=
 Name=Cool Retro Term
 Categories=Qt;System;Utility;TerminalEmulator;