`mc cp`

Table of Contents

Syntax
- Parameters
- Global Flags
Examples
Behavior
- S3 Compatibility

Syntax

The mc cp command copies objects to or from a MinIO deployment, where the source can MinIO or a local filesystem.

You can also use mc cp against the local filesystem to produce similar results to the cp commandline tool.

EXAMPLE

The following command copies files from a local filesystem directory to the mydata bucket on the myminio MinIO deployment:

mc cp --recursive ~/mydata/ myminio/mydata/

SYNTAX

The mc cp command has the following syntax:

mc [GLOBALFLAGS] cp                                                        \
                 [--attr "string"]                                         \
                 [--continue]                                              \
                 [--disable-multipart]                                     \
                 [--encrypt "string"]                                      \
                 [--encrypt-key]                                           \
                 [--legal-hold "on"]                                       \
                 [--md5]                                                   \
                 [--newer-than "string"]                                   \
                 [--older-than "string"]                                   \
                 [--preserve]                                              \
                 [--recursive]                                             \
                 [--retention-mode "string" --retention-duration "string"] \
                 [--rewind "string"]                                       \
                 [--storage-class "string"]                                \
                 [--tags "string"]                                         \
                 [--version-id "string"]                                   \
                 SOURCE [SOURCE ...]                                       \
                 TARGET

Brackets [] indicate optional parameters.
Parameters sharing a line are mutually dependent.
Parameters seperated using the pipe | operator are mutually exclusive.

Copy the example to a text editor and modify as-needed before running the command in the terminal/shell.

Parameters

SOURCE

Required The object or objects to copy.

For copying an object from MinIO, specify the alias and the full path to that object (e.g. bucket and path to object). For example:

mc cp play/mybucket/object.txt ~/mydata/object.txt

Specify multiple SOURCE paths to copy multiple objects to the specified TARGET. mc cp treats the last specified alias or filesystem path as the TARGET. For example:

mc cp ~/data/object.txt myminio/mydata/object.txt play/mydata/object.txt

For copying an object from a local filesystem, specify the full path to that object. For example:

mc cp ~/mydata/object.txt play/mybucket/object.txt

If you specify a directory or bucket to SOURCE, you must also specify --recursive to recursively copy the contents of that directory or bucket. If you omit the --recursive argument, cp only copies objects in the top level of the specified directory or bucket.

TARGET

Required The full path to which mc cp copies the object.

For copying an object to MinIO, specify the alias and the full path to that object (e.g. bucket and path to object). For example:

mc cp ~/mydata/object.txt play/mybucket/object.txt

For copying an object from a local filesystem, specify the full path to that object. For example:

mc cp play/mybucket/object.txt ~/mydata/object.txt

--attr: Optional Add custom metadata for the object. Specify key-value pairs as KEY=VALUE\;. For example, --attr key1=value1\;key2=value2\;key3=value3.

--continue, c: Optional Create or resume a copy session.

--disable-multipart: Optional Disables multipart upload for the copy session.

--encrypt

Optional Encrypt or decrypt objects using server-side encryption with server-managed keys. Specify key-value pairs as KEY=VALUE.

Each KEY represents a bucket or object.
Each VALUE represents the data key to use for encrypting
object(s).

Enclose the entire list of key-value pairs passed to --encrypt in double-quotes ".

--encrypt can use the MC_ENCRYPT environment variable for retrieving a list of encryption key-value pairs as an alternative to specifying them on the command line.

--encrypt-key

Optional Encrypt or decrypt objects using server-side encryption with client-specified keys. Specify key-value pairs as KEY=VALUE.

Each KEY represents a bucket or object.
Each VALUE represents the data key to use for encrypting
object(s).

Enclose the entire list of key-value pairs passed to --encrypt-key in double quotes ".

--encrypt-key can use the MC_ENCRYPT_KEY environment variable for retrieving a list of encryption key-value pairs as an alternative to specifying them on the command line.

--legal-hold

Optional Enables indefinite Legal Hold object locking on the copied objects.

Specify on.

md5: Optional Forces all uploads to calculate MD5 checksums.

--newer-than

Optional Remove object(s) newer than the specified number of days. Specify a string in #d#hh#mm#ss format. For example: --older-than 1d2hh3mm4ss

Defaults to 0 (all objects).

--older-than

Optional Remove object(s) older than the specified time limit. Specify a string in #d#hh#mm#ss format. For example: --older-than 1d2hh3mm4ss

Defaults to 0 (all objects).

--preserve, a: Optional Preserve file system attributes and bucket policy rules of the SOURCE directories, buckets, and objects on the TARGET bucket(s).

--recursive, r: Optional Recursively copy the contents of each bucket or directory SOURCE to the TARGET bucket.

--retention-duration

Optional The duration of the WORM retention mode to apply to the copied object(s).

Specify the duration as a string in #d#hh#mm#ss format. For example: --retention-duration "1d2hh3mm4ss".

Requires specifying --retention-mode.

--retention-mode

Optional enables object locking mode on the copied object(s). Supports the following values:

GOVERNANCE
COMPLIANCE

Requires specifying --retention-duration.

--rewind

Optional Directs mc cp to operate only on the object version(s) that existed at specified point-in-time.

To rewind to a specific date in the past, specify the date as an ISO8601-formatted timestamp. For example: --rewind "2020.03.24T10:00".
To rewind a duration in time, specify the duration as a string in #d#hh#mm#ss format. For example: --rewind "1d2hh3mm4ss".

--rewind requires that the specified SOURCE be an S3-compatible service that supports Bucket Versioning. For MinIO deployments, use mc version to enable or disable bucket versioning.

storage-class, sc

Optional Set the storage class for the new object(s) on the TARGET.

See AmazonS3/latest/dev/storage-class-intro.html for more information on S3 storage classses.

--tags

Optional Applies one or more tags to the copied objects.

Specify an ampersand-seperated list of key-value pairs as KEY1=VALUE1&KEY2=VALUE2, where each pair represents one tag to assign to the objects.

--version-id, vid

Optional Directs mc cp to operate only on the specified object version.

--version-id requires that the specified SOURCE be an S3-compatible service that supports Bucket Versioning. For MinIO deployments, use mc version to enable or disable bucket versioning.

Global Flags

--debug

Optional

Enables verbose output to the console.

For example:

mc --debug COMMAND

--config-dir: Optional
The path to a JSON formatted configuration file that mc uses for storing data. See Configuration File for more information on how mc uses the configuration file.

--JSON

Optional

Enables JSON lines formatted output to the console.

For example:

mc --JSON COMMAND

--no-color: Optional
Disables the built-in color theme for console output. Useful for dumb terminals.

--quiet: Optional
Suppresses console output.

--insecure: Optional
Disables TLS/SSL certificate verification. Allows TLS connectivity to servers with invalid certificates. Exercise caution when using this option against untrusted S3 hosts.

--version: Optional
Displays the current version of mc.

--help: Optional
Displays a summary of command usage on the terminal.

Examples

Copy Object to S3

Use mc cp to copy an object to an S3-compatible host:

Filesystem to S3

mc cp SOURCE ALIAS/PATH

Replace SOURCE with the filesystem path to the object.
Replace ALIAS with the alias of a configured S3-compatible host.
Replace PATH with the path to the object on the S3-compatible host. You can specify a different object name to “rename” the object on copy.

S3 to S3

mc cp SRCALIAS/SRCPATH TGTALIAS/TGTPATH

Replace SRCALIAS with the alias of a source S3-compatible host.
Replace SRCPATH with the path to the object on the S3-compatible host.
Replace TGTALIAS with the alias of a target S3-compatible host.
Replace TGTPATH with the path to the object on a target S3-compatible host. Omit the object name to use the SRCPATH object name.

Recursively Copy Objects to S3

Use mc cp --recursive to recursively copy objects to an S3-compatible host:

Filesystem to S3

mc cp --recursive SOURCE ALIAS/PATH

Replace SOURCE with the filesystem path to the directory containing the file(s).
Replace ALIAS with the alias of a configured S3-compatible host.
Replace PATH with the path to the object on the S3-compatible host. mc cp uses the SOURCE filenames when creating the objects on the target host.

S3 to S3

mc cp --recursive SRCALIAS/SRCPATH TGTALIAS/TGTPATH

Replace SRCALIAS with the alias of a source S3-compatible host.
Replace SRCPATH with the path to the bucket or bucket prefix on the source S3-compatible host.
Replace TGTALIAS with the alias of a target S3-compatible host.
Replace TGTPATH with the path to the object on the target S3-compatible host. mc cp uses the SRCPATH object names when creating objects on the target host.

Copy Point-In-Time Version of Object

Use mc cp --rewind to copy an object as it existed at a specific point in time. This command only applies to S3-to-S3 copy.

mc cp --rewind DURATION SRCALIAS/SRCPATH TGTALIAS/TGTPATH

Replace DURATION with the point-in-time in the past at which the command copies the object. For example, specify 30d to copy the version of the object 30 days prior to the current date.
Replace SRCALIAS with the alias of a source S3-compatible host.
Replace SRCPATH with the path to the object on the source S3-compatible host.
Replace TGTALIAS with the alias of a target S3-compatible host.
Replace TGTPATH with the path to the object on the target S3-compatible host. Omit the object name to use the SRCPATH object name.

Requires Versioning

mc cp requires bucket versioning to use this feature. Use mc version to enable versioning on a bucket.

Copy Specific Version of Object

Use mc cp --version-id to copy a specific version of an object. This command only applies to S3-to-S3 copy.

mc cp --version-id VERSION SRCALIAS/SRCPATH TGTALIAS/TGTPATH

Replace VERSION with the version of the object to copy.
Replace SRCALIAS with the alias of a source S3-compatible host.
Replace SRCPATH with the path to the object on the source S3-compatible host.
Replace TGTALIAS with the alias of a target S3-compatible host.
Replace TGTPATH with the path to the object on the target S3-compatible host. Omit the object name to use the SRCPATH object name.

Requires Versioning

mc cp requires bucket versioning to use this feature. Use mc version to enable versioning on a bucket.

Behavior

mc cp verifies all copy operations to object storage using MD5SUM checksums.

Interrupted or failed copy operations can resume from the point of failure by issuing the mc cp operation again with the --continue argument.

S3 Compatibility

The mc commandline tool is built for compatibility with the AWS S3 API and is tested MinIO and AWS S3 for expected functionality and behavior.

MinIO provides no guarantees for other S3-compatible services, as their S3 API implementation is unknown and therefore unsupported. While mc commands may work as documented, any such usage is at your own risk.