rcopy: 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/rcopy - from package: librdmacm-utils

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

On Debian possible default full paths are:

/usr/bin/rcopy - from package: rdmacm-utils

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

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