cmph: 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/cmph - from package: libcmph-tools

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

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