lava-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/lava-tool - from package: lava-tool

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

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