mhonarc: 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/mhonarc - from package: mhonarc

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

On Debian possible default full paths are:

/usr/bin/mhonarc - from package: mhonarc

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

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