pmcd_wait: 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/pmcd_wait - 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/pmcd_wait - from package: pcp

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

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