wmnd: 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/wmnd - from package: wmnd-snmp
/usr/bin/wmnd - from package: wmnd

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

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