partitioning - How to move a partition in GNU/Linux?

How to move a partition to the beginning of the disk a bit? Parted wants a filesystem for some reason (I don't know why), I want just to shift all sectors left...

r@l:15:32:45:~# parted /dev/sdb
GNU Parted 2.3
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                
Model: HGST HTS 541010A9E680 (scsi)
Disk /dev/sdb: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  32.2GB  32.2GB  primary  fat32
 2      32.2GB  37.6GB  5360MB  primary
 3      37.6GB  1000GB  963GB   primary

(parted) move 3                                                           
WARNING: you are attempting to use parted to operate on (move) a file system.
parted's file system manipulation code is not as robust as what you'll find in
dedicated, file-system-specific packages like e2fsprogs.  We recommend
you use parted only to manipulate partition tables, whenever possible.
Support for performing most operations on most types of file systems
will be removed in an upcoming release.
Error: Could not detect file system.

Answer

sfdisk, which intents to be a scriptable fdisk, has since some version the --move-data option. Example from their man page:

echo '+100M,' | sfdisk --move-data /dev/sdc -N 1

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