cgm-release-agent: 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:

/sbin/cgm-release-agent - from package: cgmanager

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