askbot.wsgi: 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/askbot.wsgi - from package: askbot

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

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