mirabait: 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/mirabait - from package: mira-assembler

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

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