Dreambox Telnet cmd needed

[slickjdip]

I used this method of backup and restore of my image:
BACKUP your image:
1) Telnet to your dreambox, login as root
2) type in "cat /dev/mtd/3 > /var/tmp/backup.img"
3) you can download this image to your pc via ftp


RESTORE your image:
1) login to dreambox via ftp as root
2) upload the backup.img file from your pc to the dreambox in /var/tmp/
3) telnet to the box as root
4) type "cd /var/tmp"
5) type "eraseall /dev/mtd/3 && cp backup.img /dev/mtd/3"
6) type "reboot"

The issue is on restore eraseall is not recognised:
-sh: eraseall: not found

Any ideas?