behave: 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/behave - from package: python-behave

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

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