narcissus-zeromq-source: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/narcissus-zeromq-source - from package: python-narcissus-common

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