web2py: 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 Debian possible default full paths are:

/usr/bin/web2py - from package: python-web2py

You may install the required package with command apt-get install {package}

Error in other languages:
web2py: bevel nie gevind nie
web2py: comandă negăsită
web2py: comando não encontrado
web2py: commande introuvable
web2py: command not found
web2py: käsku ei ole
web2py: không tìm thấy lệnh
web2py: komanda nerasta
web2py: Kommando nicht gefunden.
web2py: kommandot finns inte
web2py: komut yok
web2py: nie znaleziono polecenia
web2py: níor aimsíodh an t-ordú
web2py: no se encontró la orden
web2py: no s'ha trobat l'ordre
web2py: opdracht niet gevonden
web2py: parancs nem található
web2py: perintah tidak ditemukan
web2py: príkaz nenájdený
web2py: příkaz nenalezen
web2py: команда не найдена
web2py: командата не е открита
web2py: 命令找不到
web2py: コマンドが見つかりません