freefoam-debugSwitches: 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

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-debugSwitches - from package: freefoam

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