osgparticleshader: 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/osgparticleshader - from package: openscenegraph

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