mcu8051ide: 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/mcu8051ide - from package: mcu8051ide

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

Error in other languages:
mcu8051ide: bevel nie gevind nie
mcu8051ide: comandă negăsită
mcu8051ide: comando não encontrado
mcu8051ide: commande introuvable
mcu8051ide: command not found
mcu8051ide: käsku ei ole
mcu8051ide: không tìm thấy lệnh
mcu8051ide: komanda nerasta
mcu8051ide: Kommando nicht gefunden.
mcu8051ide: kommandot finns inte
mcu8051ide: komut yok
mcu8051ide: nie znaleziono polecenia
mcu8051ide: níor aimsíodh an t-ordú
mcu8051ide: no se encontró la orden
mcu8051ide: no s'ha trobat l'ordre
mcu8051ide: opdracht niet gevonden
mcu8051ide: parancs nem található
mcu8051ide: perintah tidak ditemukan
mcu8051ide: príkaz nenájdený
mcu8051ide: příkaz nenalezen
mcu8051ide: команда не найдена
mcu8051ide: командата не е открита
mcu8051ide: 命令找不到
mcu8051ide: コマンドが見つかりません