radium_compressor: 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/radium_compressor - from package: radium-compressor

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

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