lxmms2: 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/lxmms2 - from package: lxmms2

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

Error in other languages:
lxmms2: bevel nie gevind nie
lxmms2: comandă negăsită
lxmms2: comando não encontrado
lxmms2: commande introuvable
lxmms2: command not found
lxmms2: käsku ei ole
lxmms2: không tìm thấy lệnh
lxmms2: komanda nerasta
lxmms2: Kommando nicht gefunden.
lxmms2: kommandot finns inte
lxmms2: komut yok
lxmms2: nie znaleziono polecenia
lxmms2: níor aimsíodh an t-ordú
lxmms2: no se encontró la orden
lxmms2: no s'ha trobat l'ordre
lxmms2: opdracht niet gevonden
lxmms2: parancs nem található
lxmms2: perintah tidak ditemukan
lxmms2: príkaz nenájdený
lxmms2: příkaz nenalezen
lxmms2: команда не найдена
lxmms2: командата не е открита
lxmms2: 命令找不到
lxmms2: コマンドが見つかりません