s3cmd man page

s3cmd — tool for managing Amazon S3 storage space and Amazon CloudFront content delivery network


s3cmd [Options] COMMAND [PARAMETERS]


s3cmd is a command line client for copying files to/from Amazon S3 (Simple Storage Service) and performing other related tasks, for instance creating and removing buckets, listing objects, etc.


s3cmd can do several actions specified by the following commands.

s3cmd mb s3://BUCKET
Make bucket
s3cmd rb s3://BUCKET
Remove bucket
s3cmd ls [s3://BUCKET[/PREFIX]]
List objects or buckets
s3cmd la
List all object in all buckets
s3cmd put FILE [FILE...] s3://BUCKET[/PREFIX]
Put file into bucket
Get file from bucket
s3cmd del s3://BUCKET/OBJECT
Delete file from bucket
s3cmd rm s3://BUCKET/OBJECT
Delete file from bucket (alias for del)
s3cmd restore s3://BUCKET/OBJECT
Restore file from Glacier storage
Synchronize a directory tree to S3 (checks files freshness using size and md5 checksum, unless overridden by options, see below)
s3cmd du [s3://BUCKET[/PREFIX]]
Disk usage by buckets
s3cmd info s3://BUCKET[/OBJECT]
Get various information about Buckets or Files
s3cmd cp s3://BUCKET1/OBJECT1 s3://BUCKET2[/OBJECT2]
Copy object
s3cmd modify s3://BUCKET1/OBJECT
Modify object metadata
s3cmd mv s3://BUCKET1/OBJECT1 s3://BUCKET2[/OBJECT2]
Move object
s3cmd setacl s3://BUCKET[/OBJECT]
Modify Access control list for Bucket or Files
s3cmd setpolicy FILE s3://BUCKET
Modify Bucket Policy
s3cmd delpolicy s3://BUCKET
Delete Bucket Policy
s3cmd setcors FILE s3://BUCKET
Modify Bucket CORS
s3cmd delcors s3://BUCKET
Delete Bucket CORS
s3cmd payer s3://BUCKET
Modify Bucket Requester Pays policy
s3cmd multipart s3://BUCKET [Id]
Show multipart uploads
s3cmd abortmp s3://BUCKET/OBJECT Id
Abort a multipart upload
s3cmd listmp s3://BUCKET/OBJECT Id
List parts of a multipart upload
s3cmd accesslog s3://BUCKET
Enable/disable bucket access logging
s3cmd sign STRING-TO-SIGN
Sign arbitrary string using the secret key
s3cmd signurl s3://BUCKET/OBJECT <expiry_epoch|+expiry_offset>
Sign an S3 URL to provide limited public access with expiry
s3cmd fixbucket s3://BUCKET[/PREFIX]
Fix invalid file names in a bucket
s3cmd expire s3://BUCKET
Set or delete expiration rule for the bucket
s3cmd setlifecycle FILE s3://BUCKET
Upload a lifecycle policy for the bucket
s3cmd dellifecycle s3://BUCKET
Remove a lifecycle policy for the bucket

Commands for static WebSites configuration

s3cmd ws-create s3://BUCKET
Create Website from bucket
s3cmd ws-delete s3://BUCKET
Delete Website
s3cmd ws-info s3://BUCKET
Info about Website

Commands for CloudFront management

s3cmd cflist
List CloudFront distribution points
s3cmd cfinfo [cf://DIST_ID]
Display CloudFront distribution point parameters
s3cmd cfcreate s3://BUCKET
Create CloudFront distribution point
s3cmd cfdelete cf://DIST_ID
Delete CloudFront distribution point
s3cmd cfmodify cf://DIST_ID
Change CloudFront distribution point parameters
s3cmd cfinvalinfo cf://DIST_ID[/INVAL_ID]
Display CloudFront invalidation request(s) status


Some of the below specified options can have their default values set in s3cmd config file (by default $HOME/.s3cmd). As it's a simple text file feel free to open it with your favorite text editor and do any changes you like.

-h, --help
show this help message and exit
Invoke interactive (re)configuration tool. Optionally use as '--configure s3://some-bucket' to test access to a specific bucket instead of attempting to list them all.
-c FILE, --config=FILE
Config file name. Defaults to $HOME/.s3cfg
Dump current configuration after parsing config files and command line options and exit.
AWS Access Key
AWS Secret Key
-n, --dry-run
Only show what should be uploaded or downloaded but don't actually do it. May still perform S3 requests to get bucket listings and other information though (only for file transfer commands)
-s, --ssl
Use HTTPS connection when communicating with S3. (default)
Don't use HTTPS.
-e, --encrypt
Encrypt files before uploading to S3.
Don't encrypt files.
-f, --force
Force overwrite and other dangerous operations.
Continue getting a partially downloaded file (only for [get] command).
Continue uploading partially uploaded files or multipart upload parts. Restarts/parts files that don't have matching size and md5. Skips files/parts that do. Note: md5sum checks are not always sufficient to check (part) file equality. Enable this at your own risk.
UploadId for Multipart Upload, in case you want continue an existing upload (equivalent to --continue- put) and there are multiple partial uploads. Use s3cmd multipart [URI] to see what UploadIds are associated with the given URI.
Skip over files that exist at the destination (only for [get] and [sync] commands).
-r, --recursive
Recursive upload, download or removal.
Check MD5 sums when comparing files for [sync]. (default)
Do not check MD5 sums when comparing files for [sync]. Only size will be compared. May significantly speed up transfer but may also miss some changed files.
-P, --acl-public
Store objects with ACL allowing read for anyone.
Store objects with default ACL allowing access for you only.
Grant stated permission to a given amazon user. Permission is one of: read, write, read_acp, write_acp, full_control, all
Revoke stated permission for a given amazon user. Permission is one of: read, write, read_acp, wr ite_acp, full_control, all
-D NUM, --restore-days=NUM
Number of days to keep restored file available (only for 'restore' command).
Delete remote objects with no corresponding local file [sync]
Don't delete remote objects.
Perform deletes after new uploads [sync]
*OBSOLETE* Put all updated files into place at end [sync]
Do not delete more than NUM files. [del] and [sync]
Additional destination for parallel uploads, in addition to last arg. May be repeated.
Delete remote objects after fetching to local file (only for [get] and [sync] commands).
-p, --preserve
Preserve filesystem attributes (mode, ownership, timestamps). Default for [sync] command.
Don't store FS attributes
Filenames and paths matching GLOB will be excluded from sync
Read --exclude GLOBs from FILE
Filenames and paths matching REGEXP (regular expression) will be excluded from sync
Read --rexclude REGEXPs from FILE
Filenames and paths matching GLOB will be included even if previously excluded by one of --(r)exclude(-from) patterns
Read --include GLOBs from FILE
Same as --include but uses REGEXP (regular expression) instead of GLOB
Read --rinclude REGEXPs from FILE
Read list of source-file names from FILE. Use - to read from stdin.
--region=REGION, --bucket-location=REGION
Region to create bucket in. As of now the regions are: us-east-1, us-west-1, us-west-2, eu-west-1, eu- central-1, ap-northeast-1, ap-southeast-1, ap- southeast-2, sa-east-1
HOSTNAME:PORT for S3 endpoint (default: s3.amazonaws.com, alternatives such as s3-eu- west-1.amazonaws.com). You should also set --host- bucket.
DNS-style bucket+hostname:port template for accessing a bucket (default: %(bucket)s.s3.amazonaws.com)
--reduced-redundancy, --rr
Store object with 'Reduced redundancy'. Lower per-GB price. [put, cp, mv]
--no-reduced-redundancy, --no-rr
Store object without 'Reduced redundancy'. Higher per- GB price. [put, cp, mv]
Store object with specified CLASS (STANDARD, STANDARD_IA, or REDUCED_REDUNDANCY). Lower per-GB price. [put, cp, mv]
Target prefix for access logs (S3 URI) (for [cfmodify] and [accesslog] commands)
Disable access logging (for [cfmodify] and [accesslog] commands)
Default MIME-type for stored objects. Application default is binary/octet-stream.
-M, --guess-mime-type
Guess MIME-type of files by their extension or mime magic. Fall back to default MIME-Type as specified by --default-mime-type option
Don't guess MIME-type and use the default type instead.
Don't use mime magic when guessing MIME-type.
-m MIME/TYPE, --mime-type=MIME/TYPE
Force MIME-type. Override both --default-mime-type and --guess-mime-type.
Add a given HTTP header to the upload request. Can be used multiple times. For instance set 'Expires' or 'Cache-Control' headers (or both) using this option.
Remove a given HTTP header. Can be used multiple times. For instance, remove 'Expires' or 'Cache- Control' headers (or both) using this option. [modify]
Specifies that server-side encryption will be used when putting objects. [put, sync, cp, modify]
Specifies the key id used for server-side encryption with AWS KMS-Managed Keys (SSE-KMS) when putting objects. [put, sync, cp, modify]
Override autodetected terminal and filesystem encoding (character set). Autodetected: UTF-8
Add encoding to these comma delimited extensions i.e. (css,js,html) when uploading to S3 )
Use the S3 name as given on the command line. No pre- processing, encoding, etc. Use with caution!
Disable multipart upload on files bigger than --multipart-chunk-size-mb
Size of each chunk of a multipart upload. Files bigger than SIZE are automatically uploaded as multithreaded- multipart, smaller files are uploaded using the traditional method. SIZE is in Mega-Bytes, default chunk size is 15MB, minimum allowed chunk size is 5MB, maximum is 5GB.
Include MD5 sums in bucket listings (only for 'ls' command).
-H, --human-readable-sizes
Print sizes in human readable form (eg 1kB instead of 1234).
Name of index-document (only for [ws-create] command)
Name of error-document (only for [ws-create] command)
Indicates when the expiration rule takes effect. (only for [expire] command)
Indicates the number of days after object creation the expiration rule takes effect. (only for [expire] command)
Identifying one or more objects with the prefix to which the expiration rule applies. (only for [expire] command)
Display progress meter (default on TTY).
Don't display progress meter (default on non-TTY).
Give some file-transfer stats.
Enable given CloudFront distribution (only for [cfmodify] command)
Enable given CloudFront distribution (only for [cfmodify] command)
Invalidate the uploaded filed in CloudFront. Also see [cfinval] command.
When using Custom Origin and S3 static website, invalidate the default index file.
When using Custom Origin and S3 static website, don't invalidate the path to the default index file.
Add given CNAME to a CloudFront distribution (only for [cfcreate] and [cfmodify] commands)
Remove given CNAME from a CloudFront distribution (only for [cfmodify] command)
Set COMMENT for a given CloudFront distribution (only for [cfcreate] and [cfmodify] commands)
Set the default root object to return when no object is specified in the URL. Use a relative path, i.e. default/index.html instead of /default/index.html or s3://bucket/default/index.html (only for [cfcreate] and [cfmodify] commands)
-v, --verbose
Enable verbose output.
-d, --debug
Enable debug output.
Show s3cmd version (1.6.1) and exit.
-F, --follow-symlinks
Follow symbolic links as if they are regular files
Cache FILE containing local source MD5 values
-q, --quiet
Silence output on stdout
Path to SSL CA certificate FILE (instead of system default)
Check SSL certificate validity
Do not check SSL certificate validity
Check SSL certificate hostname validity
Do not check SSL certificate hostname validity
Use AWS Signature version 2 instead of newer signature methods. Helpful for S3-like systems that don't have AWS Signature v4 yet.
Limit the upload or download speed to amount bytes per second. Amount may be expressed in bytes, kilobytes with the k suffix, or megabytes with the m suffix
Set the REQUESTER PAYS flag for operations
-l, --long-listing
Produce long listing [ls]
stop if error in transfer
Provide a Content-Disposition for signed URLs, e.g., "inline; filename=myvideo.mp4"
Provide a Content-Type for signed URLs, e.g., "video/mp4"


One of the most powerful commands of s3cmd is s3cmd sync used for synchronising complete directory trees to or from remote S3 storage. To some extent s3cmd put and s3cmd get share a similar behaviour with sync.

Basic usage common in backup scenarios is as simple as:

s3cmd sync /local/path/ s3://test-bucket/backup/

This command will find all files under /local/path directory and copy them to corresponding paths under s3://test-bucket/backup on the remote side. For example:

/local/path/file1.ext         ->  s3://bucket/backup/file1.ext
/local/path/dir123/file2.bin  ->  s3://bucket/backup/dir123/file2.bin

However if the local path doesn't end with a slash the last directory's name is used on the remote side as well. Compare these with the previous example:

s3cmd sync /local/path s3://test-bucket/backup/

will sync:

/local/path/file1.ext         ->  s3://bucket/backup/path/file1.ext
/local/path/dir123/file2.bin  ->  s3://bucket/backup/path/dir123/file2.bin

To retrieve the files back from S3 use inverted syntax:

s3cmd sync s3://test-bucket/backup/ ~/restore/

that will download files:

s3://bucket/backup/file1.ext         ->  ~/restore/file1.ext
s3://bucket/backup/dir123/file2.bin  ->  ~/restore/dir123/file2.bin

Without the trailing slash on source the behaviour is similar to what has been demonstrated with upload:

s3cmd sync s3://test-bucket/backup ~/restore/

will download the files as:

s3://bucket/backup/file1.ext         ->  ~/restore/backup/file1.ext
s3://bucket/backup/dir123/file2.bin  ->  ~/restore/backup/dir123/file2.bin

All source file names, the bold ones above, are matched against exclude rules and those that match are then re-checked against include rules to see whether they should be excluded or kept in the source list.

For the purpose of --exclude and --include matching only the bold file names above are used. For instance only path/file1.ext is tested against the patterns, not /local/path/file1.ext

Both --exclude and --include work with shell-style wildcards (a.k.a. GLOB). For a greater flexibility s3cmd provides Regular-expression versions of the two exclude options named --rexclude and --rinclude. The options with ...-from suffix (eg --rinclude-from) expect a filename as an argument. Each line of such a file is treated as one pattern.

There is only one set of patterns built from all --(r)exclude(-from) options and similarly for include variant. Any file excluded with eg --exclude can be put back with a pattern found in --rinclude-from list.

Run s3cmd with --dry-run to verify that your rules work as expected. Use together with --debug get detailed information about matching file names against exclude and include rules.

For example to exclude all files with ".jpg" extension except those beginning with a number use:

--exclude '*.jpg' --rinclude '[0-9].*.jpg'

To exclude all files except "*.jpg" extension, use:

--exclude '*' --include '*.jpg'

To exclude local directory 'somedir', be sure to use a trailing forward slash, as such:

--exclude 'somedir/'

See Also

For the most up to date list of options run: s3cmd --help
For more info about usage, examples and other related info visit project homepage at: http://s3tools.org


Written by Michal Ludvig and contributors

Contact, Support

Preferred way to get support is our mailing list:
or visit the project homepage:

Reporting Bugs

Report bugs to s3tools-bugs@lists.sourceforge.net


This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.