macchanger: 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/macchanger - from package: macchanger

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

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