If you want to install NoMachine server or player on a Gentoo or Arch Linux distribution,  you have to download the compressed tar package from the web site:

https://www.nomachine.com/download

Then, to install any of the NoMachine packages:

1) Extract the archive in the /usr/NX directory:

# tar -C /usr/ -xzf   pkgName...tar.gz

2) Run the installation script:

# /usr/NX/nxinstall --install

For versions previous than 10.2, use, according to the package type you're installing:

# /usr/NX/nxserver --install redhat
# /usr/NX/nxclient --install redhat
# /usr/NX/nxnode --install redhat

Note for Gentoo users: installation could fail (e.g. on Gentoo 2006.1) either because some of the required programs (as cp, rm, touch, flock etc...) are missing or placed in a different path from the usual path used on redhat. In this case you can try to install the required programs or create symbolic links to them to let the setup script for completing the installation.