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# Portable mode
SFTPGo allows to share a single directory on demand using the `portable` subcommand:
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```console
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sftpgo portable --help
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To serve the current working directory with auto generated credentials simply
use:
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$ sftpgo portable
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Please take a look at the usage below to customize the serving parameters
Usage:
sftpgo portable [flags]
Flags:
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-C, --advertise-credentials If the SFTP service is advertised via
multicast DNS, this flag allows to put
username/password inside the advertised
TXT record
-S, --advertise-service Advertise SFTP service using multicast
DNS
--allowed-extensions stringArray Allowed file extensions case
insensitive. The format is
/dir::ext1,ext2.
For example: "/somedir::.jpg,.png"
--denied-extensions stringArray Denied file extensions case
insensitive. The format is
/dir::ext1,ext2.
For example: "/somedir::.jpg,.png"
-d, --directory string Path to the directory to serve.
This can be an absolute path or a path
relative to the current directory
(default ".")
-f, --fs-provider int 0 means local filesystem,
1 Amazon S3 compatible,
2 Google Cloud Storage
--gcs-automatic-credentials int 0 means explicit credentials using
a JSON credentials file, 1 automatic
(default 1)
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--gcs-bucket string
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--gcs-credentials-file string Google Cloud Storage JSON credentials
file
--gcs-key-prefix string Allows to restrict access to the
virtual folder identified by this
prefix and its contents
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--gcs-storage-class string
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-h, --help help for portable
-l, --log-file-path string Leave empty to disable logging
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-v, --log-verbose Enable verbose logs
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-p, --password string Leave empty to use an auto generated
value
-g, --permissions strings User's permissions. "*" means any
permission (default [list,download])
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-k, --public-key strings
--s3-access-key string
--s3-access-secret string
--s3-bucket string
--s3-endpoint string
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--s3-key-prefix string Allows to restrict access to the
virtual folder identified by this
prefix and its contents
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--s3-region string
--s3-storage-class string
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--s3-upload-concurrency int How many parts are uploaded in
parallel (default 2)
--s3-upload-part-size int The buffer size for multipart uploads
(MB) (default 5)
-s, --sftpd-port int 0 means a random unprivileged port
-c, --ssh-commands strings SSH commands to enable.
"*" means any supported SSH command
including scp
(default [md5sum,sha1sum,cd,pwd,scp])
-u, --username string Leave empty to use an auto generated
value
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```
In portable mode, SFTPGo can advertise the SFTP service and, optionally, the credentials via multicast DNS, so there is a standard way to discover the service and to automatically connect to it.
Here is an example of the advertised service including credentials as seen using `avahi-browse` :
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```console
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= enp0s31f6 IPv4 SFTPGo portable 53705 SFTP File Transfer local
hostname = [p1.local]
address = [192.168.1.230]
port = [53705]
txt = ["password=EWOo6pJe" "user=user" "version=0.9.3-dev-b409523-dirty-2019-10-26T13:43:32Z"]
```
