lvresize: 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/lvresize - from package: lvm2

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

On Debian possible default full paths are:

/sbin/lvresize - from package: lvm2

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

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