rclone/docs/content/commands/rclone_checksum.md

title	description	slug	url	versionIntroduced
rclone checksum	Checks the files in the source against a SUM file.	rclone_checksum	/commands/rclone_checksum/	v1.56

rclone checksum

Checks the files in the source against a SUM file.

Synopsis

Checks that hashsums of source files match the SUM file. It compares hashes (MD5, SHA1, etc) and logs a report of files which don't match. It doesn't alter the file system.

If you supply the --download flag, it will download the data from remote and calculate the contents hash on the fly. This can be useful for remotes that don't support hashes or if you really want to check all the data.

Note that hash values in the SUM file are treated as case insensitive.

If you supply the --one-way flag, it will only check that files in the source match the files in the destination, not the other way around. This means that extra files in the destination that are not in the source will not be detected.

The --differ, --missing-on-dst, --missing-on-src, --match and --error flags write paths, one per line, to the file name (or stdout if it is -) supplied. What they write is described in the help below. For example --differ will write all paths which are present on both the source and destination but different.

The --combined flag will write a file (or stdout) which contains all file paths with a symbol and then a space and then the path to tell you what happened to it. These are reminiscent of diff files.

• = path means path was found in source and destination and was identical
• - path means path was missing on the source, so only in the destination
• + path means path was missing on the destination, so only in the source
• * path means path was present in source and destination but different.
• ! path means there was an error reading or hashing the source or dest.

The default number of parallel checks is 8. See the --checkers=N option for more information.

rclone checksum <hash> sumfile src:path [flags]

Options

      --combined string         Make a combined report of changes to this file
      --differ string           Report all non-matching files to this file
      --download                Check by hashing the contents
      --error string            Report all files with errors (hashing or reading) to this file
  -h, --help                    help for checksum
      --match string            Report all matching files to this file
      --missing-on-dst string   Report all files missing from the destination to this file
      --missing-on-src string   Report all files missing from the source to this file
      --one-way                 Check one way only, source files must exist on remote

See the global flags page for global options not listed here.

SEE ALSO

• rclone - Show help for rclone commands, flags and backends.