zhm: 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/sbin/zhm - from package: zephyr-clients

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

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