cdfzisot: 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 Debian possible default full paths are:

/usr/bin/cdfzisot - from package: cdftools

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

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