sa-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/sa-config - from package: libossp-sa-dev

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

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