pmgetopt: 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/libexec/pcp/bin/pmgetopt - from package: pcp

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

On Debian possible default full paths are:

/usr/lib/pcp/bin/pmgetopt - from package: pcp

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

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