readme: small update to installing on Ubuntu section
@@ -74,10 +74,11 @@ https://launchpad.net/~mraa/+archive/ubuntu/mraa
```bash
sudo add-apt-repository ppa:mraa/mraa
sudo apt-get update
-sudo apt-get install libmraa1 libmraa-dev mraa-tools python-mraa python3-mraa
+sudo apt-get install libmraa1 libmraa-dev libmraa-java python-mraa python3-mraa node-mraa mraa-tools
```
-Node.js package is available separately.
+Running MRAA tools or applications on Ubuntu systems requires elevated permissions
+(e.g. run with `sudo`).
Install on Arch Linux
---------------------
@@ -99,7 +100,7 @@ sudo zypper in mraa
Installing for Node.js only
---------------------------
-> Note: Node.js 7.0.0+ is not currntly supported. You'll have to downgrade to 6.x.x.
+> Note: Node.js 7.0.0+ is not currently supported. You'll have to downgrade to 6.x.x.
You can also install just the node.js mraa module by using npm. You will need a
C++ compiler and the node development headers, however it's not required to
