Generalise version number in linux install instructions

Author: ljden

content/software/ide-v1/tutorials/Linux/Linux.md

@@ -25,9 +25,9 @@ The file is compressed and you have to extract it in a suitable folder, remember
 
 ### Run the Install Script
 
-Open the **arduino-1.6.x** folder just created by the extraction process and spot the **install.sh** file. Right click on it and choose **Run in Terminal** from the contextual menu. The installation process will quickly end and you should find a new icon on your desktop.
+Open the **arduino-1.x.x** folder just created by the extraction process and spot the **install.sh** file. Right click on it and choose **Run in Terminal** from the contextual menu. The installation process will quickly end and you should find a new icon on your desktop.
 
-If you don't find the option to run the script from the contextual menu, you have to open a Terminal window and move into the **arduino-1.6.x** root directory and run the following command:
+If you don't find the option to run the script from the contextual menu, you have to open a Terminal window and move into the **arduino-1.x.x** root directory and run the following command:
 
 ```
 sudo sh install.sh