xbase-config: 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/xbase-config - from package: xbase-devel

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

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