pure-config.py: 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/pure-config.py - from package: pure-ftpd

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

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