sfacctd: 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/sfacctd - from package: pmacct

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

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