wmnet: 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/wmnet - from package: wmnet

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