pmpath: 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/pmpath - from package: perl-pmtools

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

On Debian possible default full paths are:

/usr/bin/pmpath - from package: pmtools

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

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