ntfsclone: command not found

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 CentOS possible default full paths are:

/sbin/ntfsclone - from package: ntfsprogs
/usr/sbin/ntfsclone - from package: ntfsprogs

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/sbin/ntfsclone - from package: ntfs-3g

You may install the required package with command apt-get install {package}

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