I use TortoiseSVN and want to use command line SVN options.

I used the command:

```
svn checkout [-N] [--ignore-externals] [-r rev] URL PATH

```

and get the following error:

> 
> 'svn' is not recognized as an internal or external command
> 
> 
> 

Is it because I need to add some environment variable? Or can't TortoiseSVN be used from the command line?