exfalso: 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/exfalso - from package: exfalso

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

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