texluac: 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/texluac - from package: texlive-binaries

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

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