sdcc-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 CentOS possible default full paths are:

/usr/bin/sdcc-sdas8051 - from package: sdcc

You may install the required package with command yum install {package}

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