darktable-generate-cache -V (return code: 1)
Unable to init server: Could not connect: Connection refused this is darktable-generate-cache copyright (c) 2014 johannes hanika; 2015 LebedevRI
darktable-generate-cache -HELP (return code: 1)
Unable to init server: Could not connect: Connection refused usage: darktable-generate-cache [-h, --help; --version] [--min-mip <0-7> (default = 0)] [-m, --max-mip <0-7> (default = 2)] [--min-imgid <N>] [--max-imgid <N>] [--core <darktable options>] When multiple mipmap sizes are requested, the biggest one is computed while the rest are quickly downsampled. The --min-imgid and --max-imgid specify the range of internal image ID numbers to work on.