luaotfload-tool: 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/luaotfload-tool - from package: texlive-luatex

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

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