cdfmocsig: 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/cdfmocsig - from package: cdftools

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