fai2ldif: 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/fai2ldif - from package: argonaut-fai-server

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

Error in other languages:
fai2ldif: bevel nie gevind nie
fai2ldif: comandă negăsită
fai2ldif: comando não encontrado
fai2ldif: commande introuvable
fai2ldif: command not found
fai2ldif: käsku ei ole
fai2ldif: không tìm thấy lệnh
fai2ldif: komanda nerasta
fai2ldif: Kommando nicht gefunden.
fai2ldif: kommandot finns inte
fai2ldif: komut yok
fai2ldif: nie znaleziono polecenia
fai2ldif: níor aimsíodh an t-ordú
fai2ldif: no se encontró la orden
fai2ldif: no s'ha trobat l'ordre
fai2ldif: opdracht niet gevonden
fai2ldif: parancs nem található
fai2ldif: perintah tidak ditemukan
fai2ldif: príkaz nenájdený
fai2ldif: příkaz nenalezen
fai2ldif: команда не найдена
fai2ldif: командата не е открита
fai2ldif: 命令找不到
fai2ldif: コマンドが見つかりません