rpdcp: 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/rpdcp - from package: pdsh

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

On Debian possible default full paths are:

/usr/bin/rpdcp - from package: pdsh

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

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