freefoam-rhoPiso: 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/freefoam-rhoPiso - from package: freefoam

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

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