plpa-taskset: 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/plpa-taskset - from package: plpa

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

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