moap: command not found

Have You tried accessing the binary with the full path?

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/moap - from package: moap

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