tpmnv_lock: 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/tpmnv_lock - from package: tboot

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

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