inetutils-ftp: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/bin/inetutils-ftp - from package: inetutils-ftp

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