radioclkd: 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
/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/sbin/radioclkd - from package: radioclk

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