lvmdump: 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:

/sbin/lvmdump - from package: lvm2

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

On Debian possible default full paths are:

/sbin/lvmdump - from package: lvm2

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

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