Some days ago their was a discussion about converting ADIF files to Cabrillo.
I never needed a Cabrillo output so I was not aware that their was (AFAIK) no convertor available for Linux.
A couple of hours later ( in reality a week later ), I have the first release of adif2cabrillo.
Please download version 1.0.5 from the download folder
Documentation on how to install and use adif2cabrillo