You will need Window or Linux. Use a virtual machine if you have a Mac. Ubuntu 14 and 16 are supported. Ubuntu 17 is not supported.
Install .NET Core.
On Linux, install the LevelDB and SQLite3 dev packages. E.g. on Ubuntu:
sudo apt-get install libleveldb-dev sqlite3 libsqlite3-dev libunwind8-dev
On Windows, use the Neo version of LevelDB.
See also official docs. Download and unzip latest release.
dotnet neo-cli.dll
Clone the neo-cli repository.
cd neo-cli
dotnet restore
dotnet publish -c Release
In order to run, you need version 1.1.2 of .Net Core. Download the SDK binary.
Assuming you extracted .Net in the parent folder:
../dotnet bin/Release/netcoreapp1.0/neo-cli.dll .
See documentation. E.g. try show state
or create wallet wallet.db3
.