partclone.dd: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/sbin/partclone.dd - from package: partclone

You may install the required package with command apt-get install {package}
Error in other languages:
partclone.dd: bevel nie gevind nie
partclone.dd: comandă negăsită
partclone.dd: comando não encontrado
partclone.dd: commande introuvable
partclone.dd: command not found
partclone.dd: käsku ei ole
partclone.dd: không tìm thấy lệnh
partclone.dd: komanda nerasta
partclone.dd: Kommando nicht gefunden.
partclone.dd: kommandot finns inte
partclone.dd: komut yok
partclone.dd: nie znaleziono polecenia
partclone.dd: níor aimsíodh an t-ordú
partclone.dd: no se encontró la orden
partclone.dd: no s'ha trobat l'ordre
partclone.dd: opdracht niet gevonden
partclone.dd: parancs nem található
partclone.dd: perintah tidak ditemukan
partclone.dd: príkaz nenájdený
partclone.dd: příkaz nenalezen
partclone.dd: команда не найдена
partclone.dd: командата не е открита
partclone.dd: 命令找不到
partclone.dd: コマンドが見つかりません