powerd: 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:

/sbin/powerd - from package: olpc-powerd

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