Alot of (Linux) package managers use dashes within package names and within package versions and underscores to split name from version. This is the convention I try to follow.

Example: package-name_1.0-rc1.pkg

I keep getting that question regarding this certain point. It's an arbitrary style preference. Hopefully this makes it clear: https://github.com/agis-/git-style-guide/commit/92455c1d85fd...