lvchange: 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/lvchange - from package: lvm2

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

On Debian possible default full paths are:

/sbin/lvchange - from package: lvm2

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

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