olpc-nosleep: 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/olpc-nosleep - from package: olpc-powerd

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

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