No, the platform you use to create the DCP is not relevant. They may be wanting the content on a EXT2 drive.
If it is small enough, you can provide it on a USB thumb drive formatted using FAT32. (Most USB drives come formatted that way.)
Leslie
From: dcpomatic@carlh.net
Sent: January 10, 2017 4:28 PM
To: dcpomatic@carlh.net
Reply-to: jjverrico@gmail.com
Subject: [DCP-o-matic] DCP for Linux
Hello
I've used DCP-o-Matic on a Windows machine to create a DCP for a short film I made. Worked great. I entered the short film in a film festival and got accepted. They are asking me for a Linux compatible DCP. Do I need to create the DCP on Linux for it to be Linux compatible?