xmined: 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/xmined - from package: xmined

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

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