o2image: 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:

/sbin/o2image - from package: ocfs2-tools

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

Error in other languages:
o2image: bevel nie gevind nie
o2image: comandă negăsită
o2image: comando não encontrado
o2image: commande introuvable
o2image: command not found
o2image: käsku ei ole
o2image: không tìm thấy lệnh
o2image: komanda nerasta
o2image: Kommando nicht gefunden.
o2image: kommandot finns inte
o2image: komut yok
o2image: nie znaleziono polecenia
o2image: níor aimsíodh an t-ordú
o2image: no se encontró la orden
o2image: no s'ha trobat l'ordre
o2image: opdracht niet gevonden
o2image: parancs nem található
o2image: perintah tidak ditemukan
o2image: príkaz nenájdený
o2image: příkaz nenalezen
o2image: команда не найдена
o2image: командата не е открита
o2image: 命令找不到
o2image: コマンドが見つかりません