live-persistence: 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-persistence - from package: live-tools

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

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