obex_push: 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 CentOS possible default full paths are:

/usr/bin/obex_push - from package: openobex-apps

You may install the required package with command yum install {package}

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