lvs: 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/lvs - from package: lvm2

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

On Debian possible default full paths are:

/sbin/lvs - from package: lvm2

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

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