pmlogsummary: 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/pmlogsummary - from package: pcp

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

On Debian possible default full paths are:

/usr/bin/pmlogsummary - from package: pcp

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

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