lvmetad: 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/lvmetad - from package: lvm2

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

On Debian possible default full paths are:

/sbin/lvmetad - from package: lvm2

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

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