kphononplayer: 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/kphononplayer - from package: kmplayer

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

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