ocs-onthefly: 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-onthefly - from package: clonezilla

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

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