osgsimpleshaders: 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/osgsimpleshaders - from package: openscenegraph

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

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