ntfscluster: 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:

/bin/ntfscluster - from package: ntfsprogs
/usr/bin/ntfscluster - from package: ntfsprogs

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

On Debian possible default full paths are:

/bin/ntfscluster - from package: ntfs-3g

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

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