113 lines
5.7 KiB
Markdown
113 lines
5.7 KiB
Markdown
---
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title: "rclone checksum"
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description: "Checks the files in the destination against a SUM file."
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versionIntroduced: v1.56
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# autogenerated - DO NOT EDIT, instead edit the source code in cmd/checksum/ and as part of making a release run "make commanddocs"
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---
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# rclone checksum
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Checks the files in the destination against a SUM file.
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## Synopsis
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Checks that hashsums of destination files match the SUM file.
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It compares hashes (MD5, SHA1, etc) and logs a report of files which
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don't match. It doesn't alter the file system.
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The sumfile is treated as the source and the dst:path is treated as
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the destination for the purposes of the output.
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If you supply the `--download` flag, it will download the data from the remote
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and calculate the content hash on the fly. This can be useful for remotes
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that don't support hashes or if you really want to check all the data.
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Note that hash values in the SUM file are treated as case insensitive.
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If you supply the `--one-way` flag, it will only check that files in
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the source match the files in the destination, not the other way
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around. This means that extra files in the destination that are not in
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the source will not be detected.
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The `--differ`, `--missing-on-dst`, `--missing-on-src`, `--match`
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and `--error` flags write paths, one per line, to the file name (or
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stdout if it is `-`) supplied. What they write is described in the
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help below. For example `--differ` will write all paths which are
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present on both the source and destination but different.
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The `--combined` flag will write a file (or stdout) which contains all
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file paths with a symbol and then a space and then the path to tell
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you what happened to it. These are reminiscent of diff files.
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- `= path` means path was found in source and destination and was identical
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- `- path` means path was missing on the source, so only in the destination
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- `+ path` means path was missing on the destination, so only in the source
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- `* path` means path was present in source and destination but different.
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- `! path` means there was an error reading or hashing the source or dest.
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The default number of parallel checks is 8. See the [--checkers=N](/docs/#checkers-n)
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option for more information.
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```
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rclone checksum <hash> sumfile dst:path [flags]
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```
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## Options
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```
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--combined string Make a combined report of changes to this file
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--differ string Report all non-matching files to this file
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--download Check by hashing the contents
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--error string Report all files with errors (hashing or reading) to this file
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-h, --help help for checksum
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--match string Report all matching files to this file
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--missing-on-dst string Report all files missing from the destination to this file
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--missing-on-src string Report all files missing from the source to this file
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--one-way Check one way only, source files must exist on remote
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```
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Options shared with other commands are described next.
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See the [global flags page](/flags/) for global options not listed here.
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### Filter Options
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Flags for filtering directory listings
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```
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--delete-excluded Delete files on dest excluded from sync
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--exclude stringArray Exclude files matching pattern
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--exclude-from stringArray Read file exclude patterns from file (use - to read from stdin)
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--exclude-if-present stringArray Exclude directories if filename is present
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--files-from stringArray Read list of source-file names from file (use - to read from stdin)
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--files-from-raw stringArray Read list of source-file names from file without any processing of lines (use - to read from stdin)
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-f, --filter stringArray Add a file filtering rule
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--filter-from stringArray Read file filtering patterns from a file (use - to read from stdin)
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--ignore-case Ignore case in filters (case insensitive)
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--include stringArray Include files matching pattern
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--include-from stringArray Read file include patterns from file (use - to read from stdin)
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--max-age Duration Only transfer files younger than this in s or suffix ms|s|m|h|d|w|M|y (default off)
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--max-depth int If set limits the recursion depth to this (default -1)
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--max-size SizeSuffix Only transfer files smaller than this in KiB or suffix B|K|M|G|T|P (default off)
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--metadata-exclude stringArray Exclude metadatas matching pattern
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--metadata-exclude-from stringArray Read metadata exclude patterns from file (use - to read from stdin)
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--metadata-filter stringArray Add a metadata filtering rule
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--metadata-filter-from stringArray Read metadata filtering patterns from a file (use - to read from stdin)
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--metadata-include stringArray Include metadatas matching pattern
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--metadata-include-from stringArray Read metadata include patterns from file (use - to read from stdin)
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--min-age Duration Only transfer files older than this in s or suffix ms|s|m|h|d|w|M|y (default off)
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--min-size SizeSuffix Only transfer files bigger than this in KiB or suffix B|K|M|G|T|P (default off)
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```
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### Listing Options
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Flags for listing directories
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```
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--default-time Time Time to show if modtime is unknown for files and directories (default 2000-01-01T00:00:00Z)
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--fast-list Use recursive list if available; uses more memory but fewer transactions
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```
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## See Also
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* [rclone](/commands/rclone/) - Show help for rclone commands, flags and backends.
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