freefoam-removeFaces: 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-removeFaces - from package: freefoam

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