numptyphysics: 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/numptyphysics - from package: numptyphysics

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

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