pnmto565fb: 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:

/usr/bin/pnmto565fb - from package: olpc-powerd

You may install the required package with command apt-get install {package}
Error in other languages:
pnmto565fb: bevel nie gevind nie
pnmto565fb: comandă negăsită
pnmto565fb: comando não encontrado
pnmto565fb: commande introuvable
pnmto565fb: command not found
pnmto565fb: käsku ei ole
pnmto565fb: không tìm thấy lệnh
pnmto565fb: komanda nerasta
pnmto565fb: Kommando nicht gefunden.
pnmto565fb: kommandot finns inte
pnmto565fb: komut yok
pnmto565fb: nie znaleziono polecenia
pnmto565fb: níor aimsíodh an t-ordú
pnmto565fb: no se encontró la orden
pnmto565fb: no s'ha trobat l'ordre
pnmto565fb: opdracht niet gevonden
pnmto565fb: parancs nem található
pnmto565fb: perintah tidak ditemukan
pnmto565fb: príkaz nenájdený
pnmto565fb: příkaz nenalezen
pnmto565fb: команда не найдена
pnmto565fb: командата не е открита
pnmto565fb: 命令找不到
pnmto565fb: コマンドが見つかりません