# OldCheckSum

The checksum of the old configuration file. The checksum of the older version of the file must match the current version of the file, otherwise the action does not run, because the file must have changed.

NOTE: You can use the GetSharedFile action to retrieve the checksum.

Actions: | UpdateSharedFile UpdateServiceConfig
Type: | String
Default: | None
Required: | Required for `UpdateServiceConfig`. Optional for UpdateSharedFile, unless you set `Operation` to `update` or `delete`, in which case it is required.
Example: | `OldCheckSum=ad215bc3e76e021f7cf4c9284e57bf8d`
See Also: | SharedFilePath (configuration parameter)

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