ocs-lvm2-stop: 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/sbin/ocs-lvm2-stop - from package: clonezilla

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

Error in other languages:
ocs-lvm2-stop: bevel nie gevind nie
ocs-lvm2-stop: comandă negăsită
ocs-lvm2-stop: comando não encontrado
ocs-lvm2-stop: commande introuvable
ocs-lvm2-stop: command not found
ocs-lvm2-stop: käsku ei ole
ocs-lvm2-stop: không tìm thấy lệnh
ocs-lvm2-stop: komanda nerasta
ocs-lvm2-stop: Kommando nicht gefunden.
ocs-lvm2-stop: kommandot finns inte
ocs-lvm2-stop: komut yok
ocs-lvm2-stop: nie znaleziono polecenia
ocs-lvm2-stop: níor aimsíodh an t-ordú
ocs-lvm2-stop: no se encontró la orden
ocs-lvm2-stop: no s'ha trobat l'ordre
ocs-lvm2-stop: opdracht niet gevonden
ocs-lvm2-stop: parancs nem található
ocs-lvm2-stop: perintah tidak ditemukan
ocs-lvm2-stop: príkaz nenájdený
ocs-lvm2-stop: příkaz nenalezen
ocs-lvm2-stop: команда не найдена
ocs-lvm2-stop: командата не е открита
ocs-lvm2-stop: 命令找不到
ocs-lvm2-stop: コマンドが見つかりません