rclone/docs/content/commands/rclone_checksum.md
2023-08-02 12:53:09 +01:00

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---
title: "rclone checksum"
description: "Checks the files in the source against a SUM file."
slug: rclone_checksum
url: /commands/rclone_checksum/
groups: Filter,Listing
versionIntroduced: v1.56
# autogenerated - DO NOT EDIT, instead edit the source code in cmd/checksum/ and as part of making a release run "make commanddocs"
---
# 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](/docs/#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
```
## Filter Options
Flags for filtering directory listings.
```
--delete-excluded Delete files on dest excluded from sync
--exclude stringArray Exclude files matching pattern
--exclude-from stringArray Read file exclude patterns from file (use - to read from stdin)
--exclude-if-present stringArray Exclude directories if filename is present
--files-from stringArray Read list of source-file names from file (use - to read from stdin)
--files-from-raw stringArray Read list of source-file names from file without any processing of lines (use - to read from stdin)
-f, --filter stringArray Add a file filtering rule
--filter-from stringArray Read file filtering patterns from a file (use - to read from stdin)
--ignore-case Ignore case in filters (case insensitive)
--include stringArray Include files matching pattern
--include-from stringArray Read file include patterns from file (use - to read from stdin)
--max-age Duration Only transfer files younger than this in s or suffix ms|s|m|h|d|w|M|y (default off)
--max-depth int If set limits the recursion depth to this (default -1)
--max-size SizeSuffix Only transfer files smaller than this in KiB or suffix B|K|M|G|T|P (default off)
--metadata-exclude stringArray Exclude metadatas matching pattern
--metadata-exclude-from stringArray Read metadata exclude patterns from file (use - to read from stdin)
--metadata-filter stringArray Add a metadata filtering rule
--metadata-filter-from stringArray Read metadata filtering patterns from a file (use - to read from stdin)
--metadata-include stringArray Include metadatas matching pattern
--metadata-include-from stringArray Read metadata include patterns from file (use - to read from stdin)
--min-age Duration Only transfer files older than this in s or suffix ms|s|m|h|d|w|M|y (default off)
--min-size SizeSuffix Only transfer files bigger than this in KiB or suffix B|K|M|G|T|P (default off)
```
## Listing Options
Flags for listing directories.
```
--default-time Time Time to show if modtime is unknown for files and directories (default 2000-01-01T00:00:00Z)
--fast-list Use recursive list if available; uses more memory but fewer transactions
```
See the [global flags page](/flags/) for global options not listed here.
# SEE ALSO
* [rclone](/commands/rclone/) - Show help for rclone commands, flags and backends.