sdas8051: 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/sdas8051 - from package: sdcc

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

Error in other languages:
sdas8051: bevel nie gevind nie
sdas8051: comandă negăsită
sdas8051: comando não encontrado
sdas8051: commande introuvable
sdas8051: command not found
sdas8051: käsku ei ole
sdas8051: không tìm thấy lệnh
sdas8051: komanda nerasta
sdas8051: Kommando nicht gefunden.
sdas8051: kommandot finns inte
sdas8051: komut yok
sdas8051: nie znaleziono polecenia
sdas8051: níor aimsíodh an t-ordú
sdas8051: no se encontró la orden
sdas8051: no s'ha trobat l'ordre
sdas8051: opdracht niet gevonden
sdas8051: parancs nem található
sdas8051: perintah tidak ditemukan
sdas8051: príkaz nenájdený
sdas8051: příkaz nenalezen
sdas8051: команда не найдена
sdas8051: командата не е открита
sdas8051: 命令找不到
sdas8051: コマンドが見つかりません