isatapd: 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:

/usr/sbin/isatapd - from package: isatapd

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