myproxy-replicate: 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/sbin/myproxy-replicate - from package: myproxy-admin

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

On Debian possible default full paths are:

/usr/sbin/myproxy-replicate - from package: myproxy-admin

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

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