mzip: 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/mzip - from package: mtools

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

On Debian possible default full paths are:

/usr/bin/mzip - from package: mtools

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

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