freefoam-interDyM: 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
/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-interDyM - from package: freefoam

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