pmcollectl: command not found

Have You tried accessing the binary with the full path?

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/pmcollectl - from package: pcp-system-tools

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

On Debian possible default full paths are:

/usr/bin/pmcollectl - from package: pcp

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