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

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

On Debian possible default full paths are:

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

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

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