lily-image-commands: 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/lily-image-commands - from package: texlive-music

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

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