问题
The specific package I'm referring to is trac-1.0.1-1.sdl6.noarch.rpm. According to this page:
http://www.rpm.org/max-rpm/ch-rpm-file-format.html
it seems to be part of the package release version. The fact that "sdl" does not appear in my /usr/lib/rpm/rpmrc file also suggests that it's not related to the architecture.
If you search google for sdl6, just about every hit is the name of an RPM package. Nowhere, however, could I find an explanation of what it means.
回答1:
That's the distro tag (for CentOS normally el#). In this case sdl appears to be for Springdale Linux.
来源：https://stackoverflow.com/questions/23542804/what-does-sdl6-in-an-rpm-package-name-refer-to