gcnmz: 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/gcnmz - from package: namazu2-index-tools

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

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