lvmsadc: 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/lvmsadc - from package: lvm2

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

On Debian possible default full paths are:

/sbin/lvmsadc - from package: lvm2

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

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