Minio Client Complete Guide Slack

Minio Client (mc) provides a modern alternative to UNIX commands like ls, cat, cp, mirror, diff etc. It supports filesystems and Amazon S3 compatible cloud storage service (AWS Signature v2 and v4).

ls            List files and folders.
mb            Make a bucket or folder.
cat           Display contents of a file.
pipe          Write contents of stdin to target. When no target is specified, it writes to stdout.
share         Generate URL for sharing.
cp            Copy one or more objects to a target.
mirror        Mirror folders recursively from a single source to single destination.
diff          Compute differences between two folders.
rm            Remove file or bucket [WARNING: Use with care].
events        Manage bucket notification.
watch         Watch for events on object storage and filesystem.
policy        Set public policy on bucket or prefix.
session       Manage saved sessions of cp and mirror operations.
config        Manage configuration file.
update        Check for a new software update.
version       Print version.

1. Download Minio Client

Platform Architecture URL
GNU/Linux 64-bit Intel
32-bit Intel
32-bit ARM
Apple OS X 64-bit Intel
Microsoft Windows 64-bit
FreeBSD 64-bit
Solaris/Illumos 64-bit

Install from Homebrew

Install minio packages using Homebrew

brew install minio-mc
mc --help

Install from Source

Source installation is intended only for developers and advanced users. mc update command does not support upgrading from source based installation. Please download official releases from

If you do not have a working Golang environment, please follow How to install Golang.

go get -u

2. Run Minio Client


chmod +x mc
./mc --help


chmod 755 mc
./mc --help

Microsoft Windows

mc.exe --help


chmod 755 mc
./mc --help


chmod 755 mc
./mc --help

3. Add a Cloud Storage Service

Note: If you are planning to use mc only on POSIX compatible filesystems, you may skip this step and proceed to Step 4.

To add one or more Amazon S3 compatible hosts, please follow the instructions below. mc stores all its configuration information in ~/.mc/config.json file.



Alias is simply a short name to you cloud storage service. S3 end-point, access and secret keys are supplied by your cloud storage provider. API signature is an optional argument. By default, it is set to "S3v4".

Example - Minio Cloud Storage

Minio server displays URL, access and secret keys.

mc config host add minio BKIKJAA5BMMU2RHO6IBB V7f1CwQqAcwo80UEIJEjc5gVQUSSx5ohQ9GSrr12 S3v4

Example - Amazon S3 Cloud Storage

Get your AccessKeyID and SecretAccessKey by following AWS Credentials Guide.

mc config host add s3 BKIKJAA5BMMU2RHO6IBB V7f1CwQqAcwo80UEIJEjc5gVQUSSx5ohQ9GSrr12 S3v4

Example - Google Cloud Storage

Get your AccessKeyID and SecretAccessKey by following Google Credentials Guide

mc config host add gcs BKIKJAA5BMMU2RHO6IBB V8f1CwQqAcwo80UEIJEjc5gVQUSSx5ohQ9GSrr12 S3v2

NOTE: Google Cloud Storage only supports Legacy Signature Version 2, so you have to pick - S3v2

4. Test Your Setup

mc is pre-configured with, aliased as "play". It is a hosted Minio server for testing and development purpose. To test Amazon S3, simply replace "play" with "s3" or the alias you used at the time of setup.


List all buckets from

mc ls play
[2016-03-22 19:47:48 PDT]     0B my-bucketname/
[2016-03-22 22:01:07 PDT]     0B mytestbucket/
[2016-03-22 20:04:39 PDT]     0B mybucketname/
[2016-01-28 17:23:11 PST]     0B newbucket/
[2016-03-20 09:08:36 PDT]     0B s3git-test/

5. Everyday Use

You may add shell aliases to override your common Unix tools.

alias ls='mc ls'
alias cp='mc cp'
alias cat='mc cat'
alias mkdir='mc mb'
alias pipe='mc pipe'

6. Global Options

Option [--debug]

Debug option enables debug output to console.

Example: Display verbose debug output for ls command.

mc --debug ls play
mc: <DEBUG> GET / HTTP/1.1
User-Agent: Minio (darwin; amd64) minio-go/1.0.1 mc/2016-04-01T00:22:11Z
Authorization: AWS4-HMAC-SHA256 Credential=**REDACTED**/20160408/us-east-1/s3/aws4_request, SignedHeaders=expect;host;x-amz-content-sha256;x-amz-date, Signature=**REDACTED**
Expect: 100-continue
X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Date: 20160408T145236Z
Accept-Encoding: gzip

mc: <DEBUG> HTTP/1.1 200 OK
Transfer-Encoding: chunked
Accept-Ranges: bytes
Content-Type: text/xml; charset=utf-8
Date: Fri, 08 Apr 2016 14:54:55 GMT
Server: Minio/DEVELOPMENT.2016-04-07T18-53-27Z (linux; amd64)
Vary: Origin
X-Amz-Request-Id: HP30I0W2U49BDBIO

mc: <DEBUG> Response Time:  1.220112837s


[2016-04-08 03:56:14 IST]     0B albums/
[2016-04-04 16:11:45 IST]     0B backup/
[2016-04-01 20:10:53 IST]     0B deebucket/
[2016-03-28 21:53:49 IST]     0B guestbucket/

Option [--json]

JSON option enables parseable output in JSON format.

Example: List all buckets from Minio play service.

mc --json ls play

Option [--no-color]

This option disables the color theme. It useful for dumb terminals.

Option [--quiet]

Quiet option suppress chatty console output.

Option [--config-folder]

Use this option to set a custom config path.

Option [ --insecure]

Skip SSL certificate verification.

7. Commands

ls - List buckets and objects mb - Make a bucket cat - Concatenate an object
cp - Copy objects rm - Remove objects pipe - Pipe to an object
share - Share access mirror - Mirror buckets diff - Diff buckets
policy - Set public policy on bucket or prefix session - Manage saved sessions config - Manage config file
watch - Watch for events events - Manage events on your buckets
update - Manage software updates version - Show version

Command ls - List Objects

ls command lists files, objects and objects. Use --incomplete flag to list partially copied content.

   mc ls [FLAGS] TARGET [TARGET ...]

  --help, -h                    Help of ls.
  --recursive, -r               List recursively.
  --incomplete, -I              List incomplete uploads.

Example: List all buckets on

mc ls play
[2016-04-08 03:56:14 IST]     0B albums/
[2016-04-04 16:11:45 IST]     0B backup/
[2016-04-01 20:10:53 IST]     0B deebucket/
[2016-03-28 21:53:49 IST]     0B guestbucket/
[2016-04-08 20:58:18 IST]     0B mybucket/

Command mb - Make a Bucket

mb command creates a new bucket on an object storage. On a filesystem, it behaves like mkdir -p command. Bucket is equivalent of a drive or mount point in filesystems and should not be treated as folders. Minio does not place any limits on the number of buckets created per user. On Amazon S3, each account is limited to 100 buckets. Please refer to Buckets Restrictions and Limitations on S3 for more information.

   mc mb [FLAGS] TARGET [TARGET...]

  --help, -h                    Help of mb.
  --region "us-east-1"          Specify bucket region. Defaults to ‘us-east-1’.

Example: Create a new bucket named "mybucket" on

mc mb play/mybucket
Bucket created successfully ‘play/mybucket’.

Command cat - Concatenate Objects

cat command concatenates contents of a file or object to another. You may also use it to simply display the contents to stdout

   mc cat [FLAGS] SOURCE [SOURCE...]

  --help, -h                    Help of cat.

Example: Display the contents of a text file myobject.txt

mc cat play/mybucket/myobject.txt
Hello Minio!!

Command pipe - Pipe to Object

pipe command copies contents of stdin to a target. When no target is specified, it writes to stdout.

   mc pipe [FLAGS] [TARGET]

  --help, -h                    Help of pipe.

Example: Stream MySQL database dump to Amazon S3 directly.

mysqldump -u root -p ******* accountsdb | mc pipe s3/ferenginar/backups/accountsdb-oct-9-2015.sql

Command cp - Copy Objects

cp command copies data from one or more sources to a target. All copy operations to object storage are verified with MD5SUM checksums. Interrupted or failed copy operations can be resumed from the point of failure.


  --help, -h                    Help of cp.
  --recursive, -r               Copy recursively.

Example: Copy a text file to to an object storage.

mc cp myobject.txt play/mybucket
myobject.txt:    14 B / 14 B  ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓  100.00 % 41 B/s 0

Command rm - Remove Buckets and Objects

Use rm command to remove file or bucket

   mc rm [FLAGS] TARGET [TARGET ...]

  --help, -h                Show this help.
  --recursive, -r           Remove recursively.
  --force                   Force a dangerous remove operation.
  --prefix                  Remove objects matching this prefix.
  --incomplete, -I          Remove an incomplete upload(s).
  --fake                    Perform a fake remove operation.
  --stdin                   Read object list from STDIN.
  --older-than value        Remove objects older than N days. (default: 0)

Example: Remove a single object.

mc rm play/mybucket/myobject.txt
Removed ‘play/mybucket/myobject.txt’.

Example: Recursively remove a bucket and all its contents. Since this is a dangerous operation, you must explicitly pass --force option.

mc rm --recursive --force play/myobject
Removed ‘play/myobject/newfile.txt’.
Removed 'play/myobject/otherobject.txt’.

Example: Remove all incompletely uploaded files from mybucket.

mc rm  --incomplete --recursive --force play/mybucket
Removed ‘play/mybucket/mydvd.iso’.
Removed 'play/mybucket/backup.tgz’.

Example: Remove object only if its created older than one day.

mc rm --force --older-than=1 play/mybucket/oldsongs

Command share - Share Access

share command securely grants upload or download access to object storage. This access is only temporary and it is safe to share with remote users and applications. If you want to grant permanent access, you may look at mc policy command instead.

Generated URL has access credentials encoded in it. Any attempt to tamper the URL will invalidate the access. To understand how this mechanism works, please follow Pre-Signed URL technique.

   mc share [FLAGS] COMMAND

  --help, -h                    Help of share.

   download   Generate URLs for download access.
   upload     Generate ‘curl’ command to upload objects without requiring access/secret keys.
   list       List previously shared objects and folders.

Sub-command share download - Share Download

share download command generates URLs to download objects without requiring access and secret keys. Expiry option sets the maximum validity period (no more than 7 days), beyond which the access is revoked automatically.

   mc share download [OPTIONS] TARGET [TARGET...]

  --help, -h                    Help of share download.
  --recursive, -r               Share all objects recursively.
  --expire, -E "168h"           Set expiry in NN[h|m|s].

Example: Grant temporary access to an object with 4 hours expiry limit.

mc share download --expire 4h play/mybucket/myobject.txt
Expire: 0 days 4 hours 0 minutes 0 seconds

Sub-command share upload - Share Upload

share upload command generates a ‘curl’ command to upload objects without requiring access/secret keys. Expiry option sets the maximum validity period (no more than 7 days), beyond which the access is revoked automatically. Content-type option restricts uploads to only certain type of files.

   mc share upload [OPTIONS] TARGET [TARGET...]

  --help, -h                    Help of share upload.
  --recursive, -r               Recursively upload any object matching the prefix.
  --expire, -E "168h"           Set expiry in NN[h|m|s].

Example: Generate a curl command to enable upload access to play/mybucket/myotherobject.txt. User replaces <FILE> with the actual filename to upload

mc share upload play/mybucket/myotherobject.txt
Expire: 7 days 0 hours 0 minutes 0 seconds
Share: curl -F x-amz-date=20160408T182356Z -F x-amz-signature=de343934bd0ba38bda0903813b5738f23dde67b4065ea2ec2e4e52f6389e51e1 -F bucket=mybucket -F policy=eyJleHBpcmF0aW9uIjoiMjAxNi0wNC0xNVQxODoyMzo1NS4wMDdaIiwiY29uZGl0aW9ucyI6W1siZXEiLCIkYnVja2V0IiwibXlidWNrZXQiXSxbImVxIiwiJGtleSIsIm15b3RoZXJvYmplY3QudHh0Il0sWyJlcSIsIiR4LWFtei1kYXRlIiwiMjAxNjA0MDhUMTgyMzU2WiJdLFsiZXEiLCIkeC1hbXotYWxnb3JpdGhtIiwiQVdTNC1ITUFDLVNIQTI1NiJdLFsiZXEiLCIkeC1hbXotY3JlZGVudGlhbCIsIlEzQU0zVVE4NjdTUFFRQTQzUDJGLzIwMTYwNDA4L3VzLWVhc3QtMS9zMy9hd3M0X3JlcXVlc3QiXV19 -F x-amz-algorithm=AWS4-HMAC-SHA256 -F x-amz-credential=Q3AM3UQ867SPQQA43P2F/20160408/us-east-1/s3/aws4_request -F key=myotherobject.txt -F file=@<FILE>

Sub-command share list - Share List

share list command lists unexpired URLs that were previously shared

   mc share list COMMAND

   upload:   list previously shared access to uploads.
   download: list previously shared access to downloads.

Command mirror - Mirror Buckets

mirror command is similar to rsync, except it synchronizes contents between filesystems and object storage.

   mc mirror [FLAGS] SOURCE TARGET

  --help, -h                Help of mirror.
  --force                   Force overwrite of an existing target(s).
  --fake                    Perform a fake mirror operation.
  --watch, -w               Watch and mirror for changes.
  --remove                  Remove extraneous file(s) on target.

Example: Mirror a local directory to 'mybucket' on

mc mirror localdir/ play/mybucket
localdir/b.txt:  40 B / 40 B  ┃▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓┃  100.00 % 73 B/s 0

Example: Continuously watch for changes on a local directory and mirror the changes to 'mybucket' on

mc mirror -w localdir play/mybucket
localdir/new.txt:  10 MB / 10 MB  ┃▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓┃  100.00 % 1 MB/s 15s

Command diff - Show Difference

diff command computes the differences between the two directories. It only lists the contents which are missing or which differ in size.

It DOES NOT compare the contents, so it is possible that the objects which are of same name and of the same size, but have difference in contents are not detected. This way, it can perform high speed comparison on large volumes or between sites


  --help, -h                    Help of diff.

Example: Compare a local directory and a remote object storage.

 mc diff localdir play/mybucket
‘localdir/notes.txt’ and ‘’ - only in first.

Command watch - Watch for events object storage and filesystem.

watch provides a convenient way to watch on various types of event notifications on object storage and filesystem.

   mc watch [FLAGS]

   --help, -h                   Help of watch.
   --events "put,delete"        Filter specific type of events. Defaults to all events by default.
   --prefix                     Filter events for a prefix.
   --suffix                     Filter events for a suffix.
   --recursive                  Recursively watch for events.

Example: Watch for all events on object storage

mc watch play/testbucket
[2016-08-18T00:51:29.735Z] 2.7KiB ObjectCreated
[2016-08-18T00:51:29.780Z]  1009B ObjectCreated
[2016-08-18T00:51:29.839Z] 6.9KiB ObjectCreated

Example: Watch for all events on local directory

mc watch ~/Photos
[2016-08-17T17:54:19.565Z] 3.7MiB ObjectCreated /home/minio/Downloads/tmp/5467026530_a8611b53f9_o.jpg
[2016-08-17T17:54:19.565Z] 3.7MiB ObjectCreated /home/minio/Downloads/tmp/5467026530_a8611b53f9_o.jpg
[2016-08-17T17:54:19.565Z] 7.5MiB ObjectCreated /home/minio/Downloads/tmp/8771468997_89b762d104_o.jpg

Command events - Manage bucket event notification.

events provides a convenient way to configure various types of event notifications on a bucket. Minio event notification can be configured to use AMQP, Redis, ElasticSearch, NATS and PostgreSQL services. Minio configuration provides more details on how these services can be configured.

   mc events [FLAGS] COMMAND

   add          Add new bucket notification.
   remove       Remove a bucket notification. With '--force' can remove all bucket notifications.
   list         List bucket notifications.

   --help, -h                   Help of events.

Example: List all configured bucket notifications

mc events list play/andoria
MyTopic        arn:minio:sns:us-east-1:1:TestTopic    s3:ObjectCreated:*,s3:ObjectRemoved:*   suffix:.jpg

Example: Add a new 'sqs' notification resource only to notify on ObjectCreated event

mc events add play/andoria arn:minio:sqs:us-east-1:1:your-queue --events put

Example: Add a new 'sqs' notification resource with filters

Add prefix and suffix filtering rules for sqs notification resource.

mc events add play/andoria arn:minio:sqs:us-east-1:1:your-queue --prefix photos/ --suffix .jpg

Example: Remove a 'sqs' notification resource

mc events remove play/andoria arn:minio:sqs:us-east-1:1:your-queue

Command policy - Manage bucket policies

Manage anonymous bucket policies to a bucket and its contents

   mc policy [FLAGS] TARGET

   Allowed policies are: [none, download, upload, public].

  --help, -h                    Help of policy.

Example: Show current anonymous bucket policy Show current anonymous bucket policy for mybucket/myphotos/2020/ sub-directory

mc policy play/mybucket/myphotos/2020/
Access permission for ‘play/mybucket/myphotos/2020/’ is ‘none’

Example : Set anonymous bucket policy to download only Set anonymous bucket policy for mybucket/myphotos/2020/ sub-directory and its objects to download only, Now your objects are publicly accessible at

mc policy download play/mybucket/myphotos/2020/
Access permission for ‘play/mybucket/myphotos/2020/’ is set to 'download'

Example : Remove current anonymous bucket policy

Remove any bucket policy for mybucket/myphotos/2020/ sub-directory.

mc policy none play/mybucket/myphotos/2020/
Access permission for ‘play/mybucket/myphotos/2020/’ is set to 'none'

Command session - Manage Sessions

session command manages previously saved sessions for cp and mirror operations

   mc session [FLAGS] OPERATION [ARG]

   resume                Resume a previously saved session.
   clear                 Clear a previously saved session.
   list                  List all previously saved sessions.

   SESSION - Session can either be $SESSION-ID or "all".

  --help, -h                    Help of session.

Example: List all previously saved sessions.

mc session list
IXWKjpQM -> [2016-04-08 19:11:14 IST] cp assets.go play/mybucket
ApwAxSwa -> [2016-04-08 01:49:19 IST] mirror miniodoc/ play/mybucket

Example: Resume a previously saved session.

mc session resume IXWKjpQM 
...assets.go: 1.68 KB / 1.68 KB  ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓  100.00 % 784 B/s 2s

Example: Drop a previously saved session.

$mc session clear ApwAxSwa
Session ‘ApwAxSwa’ cleared successfully.

Command config - Manage Config File

config host command provides a convenient way to manage host entries in your config file ~/.mc/config.json. It is also OK to edit the config file manually using a text editor.

   mc config host OPERATION

   remove ALIAS

  --help, -h                    Help of config.

Example: Manage Config File

Add Minio server access and secret keys to config file host entry. Note that, the history feature of your shell may record these keys and pose a security risk. On bash shell, use set -o and set +o to disable and enable history feature momentarily.

set +o history
mc config host add myminio http://localhost:9000 OMQAGGOL63D7UNVQFY8X GcY5RHNmnEWvD/1QxD3spEIGj+Vt9L7eHaAaBTkJ
set -o history

Command update - Software Updates

Check for new software updates from Experimental flag checks for unstable experimental releases primarily meant for testing purposes.

   mc update [FLAGS]

  --help, -h                    Help for update.
  --experimental, -E            Check experimental update.

Example: Check for an update.

mc update
You are already running the most recent version of ‘mc’.

Command version - Display Version

Display the current version of mc installed

   mc version [FLAGS]

  --help, -h                    Help for version.

Example: Print version of mc.

mc version
Version: 2016-04-01T00:22:11Z
Release-tag: RELEASE.2016-04-01T00-22-11Z
Commit-id: 12adf3be326f5b6610cdd1438f72dfd861597fce