lvsd: 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/sbin/lvsd - from package: piranha

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

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