cnvt-ocs-dev: 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/cnvt-ocs-dev - from package: clonezilla

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

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