osgsimulation: 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/osgsimulation - from package: openscenegraph

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

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