pmvers: 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/bin/pmvers - from package: perl-pmtools

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

On Debian possible default full paths are:

/usr/bin/pmvers - from package: pmtools

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

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