fiaif-update: 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/sbin/fiaif-update - from package: fiaif

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

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