osgvolume: 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/osgvolume - from package: openscenegraph

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

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