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

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

On Debian possible default full paths are:

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

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

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