cdfcmp: 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/cdfcmp - from package: cdftools

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

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