spl-config: 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/spl-config - from package: spl-dev

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

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