ocs-cnvt-usb-zip-to-dsk: 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-cnvt-usb-zip-to-dsk - from package: clonezilla

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

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