osgwindows: 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/osgwindows - from package: openscenegraph

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

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