Question: Instructions on the [airwave github](https://github.com/phantom-code/airwave) requires me to download and install the Audio Plugins SDK.

This step confuses me as new Ubuntu user: 

> 
> Unpack the VST SDK archive. Further I'll assume that you have unpacked it in your home directory: `${HOME}/VST3\ SDK.`
> 
> 
> 

I have two options:

1. Create a folder in home directory. I am unable to do that and my guess it has to do with root privileges. I believe it is recommended to use `sudo` for temporary access root privileges? I don’t know what command to use or how to create a folder in home directory otherwise
2. Use another folder in my user directory, but can someone explain the following `${HOME}/VST3\ SDK.`. What is with the slash and backslash etc. Can someone explain? I wouldn’t know how to direct the command to my user directory in here:

```
cmake -DCMAKE_BUILD_TYPE="Release" -DCMAKE_INSTALL_PREFIX=/opt/airwave -DVSTSDK_PATH=${HOME}/VST3\ SDK ..

```

Since I am a new user to Ubuntu some basic explanation would do me well.

Thank you for your time and answers

Answer: 
${HOME} means your home directory which is /home/username by default. Simply create a new Folder there named "VST3 SDK" and unpack the archive there.

The "\ " is used to indicate a whitespace, because if you would use a terminal command a whitespace also seperates arguments.
To create a folder in home, do the following:

1. Open up the terminal
2. You should already be in home (if not, do: `cd ~`)
3. `mkdir <folder_name>` or `sudo mkdir <folder_name>`