osgparticle: 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/osgparticle - from package: openscenegraph

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

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