osgfxbrowser: 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

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/osgfxbrowser - from package: openscenegraph

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