Article: Open the folder where you downloaded the texture pack. Right-click on it and select Copy. To do this, open the terminal and type ~/.minecraft/texturepacks/. A window will open showing the contents of the texture pack directory. Paste the .zip file into the texture pack folder. To run the new textures, open Minecraft and select Texture Packs from the menu. Your new texture pack will be listed. Select it and click Done.

What is a summary?
Copy the texture pack. Open the Minecraft texture pack directory. Paste the pack. Open Minecraft.