osgvirtualprogram: 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/osgvirtualprogram - from package: openscenegraph

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

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