celeryev.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"

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