cdfcsp: 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

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/cdfcsp - from package: cdftools

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