newhelp: 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/newhelp - 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/newhelp - from package: pcp

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

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