As I unsuccessfully tried to connect my Pi to a new wifi network at work I kind of blow up the "original setting" and i'm however still unable to connect to internet using my pi.
I had the situation where i was able to ping 8.8.8.8 but couldn't load google.com
Here are the content of my etc/network/interfaces 

    auto lo
    iface lo inet loopback
    iface eth0 inet static 
        address 10.93.128.114
        netmask 255.255.255.0
        network 10.93.128.0
        broadcast 10.93.128.255
        gateway 10.93.128.254

and /etc/dhcpcd.conf 

    interface eth0
    static ip_address=10.93.128.114/24
    static routers=
    static domain_name_servers=    
    static domain_search=

route -v :

    destination -> 10.93.128.0 
    gateway -> *
    genmask -> 255.255.255.0

ifconfig :

    inet addr:10.93.128.114 Bcast:10.93.128.255 Mask:255.255.255.0