sdldgb: 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/sdldgb - from package: sdcc

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

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