mzc: 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/mzc - from package: racket

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

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