cfdpclock: 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/cfdpclock - from package: ion

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

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