p910nd: 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/sbin/p910nd - from package: p910nd

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

Error in other languages:
p910nd: bevel nie gevind nie
p910nd: comandă negăsită
p910nd: comando não encontrado
p910nd: commande introuvable
p910nd: command not found
p910nd: käsku ei ole
p910nd: không tìm thấy lệnh
p910nd: komanda nerasta
p910nd: Kommando nicht gefunden.
p910nd: kommandot finns inte
p910nd: komut yok
p910nd: nie znaleziono polecenia
p910nd: níor aimsíodh an t-ordú
p910nd: no se encontró la orden
p910nd: no s'ha trobat l'ordre
p910nd: opdracht niet gevonden
p910nd: parancs nem található
p910nd: perintah tidak ditemukan
p910nd: príkaz nenájdený
p910nd: příkaz nenalezen
p910nd: команда не найдена
p910nd: командата не е открита
p910nd: 命令找不到
p910nd: コマンドが見つかりません