live-config-update: 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:

/bin/live-config-update - from package: live-config

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

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