mhlist: 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/mh/mhlist - from package: nmh

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

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