osgunittests: 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/osgunittests - from package: openscenegraph

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

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