owwrite: 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/owwrite - from package: ow-shell

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

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