OS Manuals

/usr/bin/zckdl

A file format designed for highly efficient deltas while maintaining good compression

From zchunk 1.5.5-r2 (enterprise-packages), captured 2026-11-08 by running zckdl --help (exit 0). permalink

Usage: zckdl [OPTION...] <file>
zckdl - Download zchunk file

      --fail-no-ranges       If server doesn't support ranges, fail instead of
                             downloading full file
  -q, --quiet                Only show warnings (can be specified twice to only
                             show errors)
  -s, --source=FILE          File to use as delta source
  -v, --verbose              Increase verbosity
  -?, --help                 Give this help list
      --usage                Give a short usage message
  -V, --version              Show program version

Mandatory or optional arguments to long options are also mandatory or optional
for any corresponding short options.
Options (7)
OptionDescriptionSource
--fail-no-rangesIf the server does not support ranges, fail instead of downloading the whole file.help + man
-q, --quietOnly show warnings (can be specified twice to only show errors)help + man
-s, --source FILESpecify the file to use as a source with the premise that most of the chunks in the downloaded file will be the same.help + man
-v, --verboseIncrease verbosityhelp + man
-?, --helpDisplay program usage information and exit.help + man
--usageDisplay brief program usage information and exit.help + man
-V, --versionDisplay program version information and exit.help + man
Exit status (1) from the manual page
0success

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.