oobase: 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/oobase - from package: libreoffice-base

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

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