mc cat command concatenates the contents of a file or
object to another file or object. You can also use the command to
display the contents of the specified file or object to
cat has similar functionality to
The following command concatenates the contents of an object on a
MinIO deployment to
mc cat play/mybucket/myobject.txt
mc cat command has the following syntax:
mc [GLOBALFLAGS] cat \
ALIAS [ALIAS ...]
indicate optional parameters.
Parameters sharing a line are mutually dependent.
Parameters separated 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.
You can also use
mc cat against a local filesystem to produce similar
results to the
cat commandline tool:
The alias of a MinIO deployment and the full path to the object. For example:
mc cat myminio/mybucket/myobject.txt
You can specify multiple objects on the same or different MinIO deployment. For example:
mc cat myminio/mybucket/object.txt myminio/myotherbucket/object.txt
For an object on a local filesystem, specify the full path to that object. For example:
mc cat ~/data/object.txt
mc catto 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:
To rewind a duration in time, specify the duration as a string in
#d#hh#mm#ssformat. For example:
- --version-id, vid
mc catto operate only on the specified object version.
Encrypt or decrypt objects using server-side encryption with client-specified keys. Specify key-value pairs as
KEYrepresents a bucket or object.
VALUErepresents the data key to use for encrypting
Enclose the entire list of key-value pairs passed to
--encrypt-keyin double quotes
--encrypt-keycan use the
MC_ENCRYPT_KEYenvironment variable for retrieving a list of encryption key-value pairs as an alternative to specifying them on the command line.
This command supports any of the global flags.
mc cat to return the object:
mc cat ALIAS/PATH
mc cat --rewind to return the object at a specific
point-in-time in the past:
mc cat ALIAS/PATH --rewind DURATION
PATHwith the path to the object on the S3-compatible host.
DURATIONwith the point-in-time in the past at which the command returns the object. For example, specify
30dto return the version of the object 30 days prior to the current date.
mc cat --version-id to return a specific version of the
mc cat ALIAS/PATH --version-id VERSION
The mc commandline tool is built for compatibility with the AWS S3 API and is tested with 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.