aranym-mmu: 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/aranym-mmu - from package: aranym

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

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