ncftpput: 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:

/usr/bin/ncftpput - from package: ncftp

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

On Debian possible default full paths are:

/usr/bin/ncftpput - from package: ncftp

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

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