oc-update: 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/oc-update - from package: opencaster

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

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