Connect to network and internet from your linux terminal

So... you dont have access to graphical interface and still want to connect to internet from you linux-box?

I wanted to install popcorn-time to see what it was, and i had to do something with the libudev.. a symlink something.

then I managed to delete the file libudev.so.0: 
/lib/x86_64-linux-gnu/libudev.so.0

and rebooted, then I only got the terminal login, and had to manage from there. I needed the network to get hold of a packet and install it again or something, but the network didnt get loaded at startup so had to do that too..

Here's what I did, and it worked for me.
To get the internet working again:

Started out with this:
http://linuxcommando.blogspot.no/2013/10/how-to-connect-to-wpawpa2-wifi-network.html

When the above doesnt succeed, here is an option:
http://www.cyberciti.biz/faq/howto-linux-renew-dhcp-client-ip-address/


Find the wireless device name, often wlan0:

/sbin/iw dev

phy#0
        Interface wlan0
                ifindex 3
                type managed


Is your device up and running? Check it with:

ip link show wlan0

result maybe:

wlan0: (NO-CARRIER,BROADCAST,MULTICAST,UP) mtu 1500 qdisc mq state DOWN mode DEFAULT qlen 1000
    link/ether 74:e5:43:a1:ce:65 brd ff:ff:ff:ff:ff:ff

note the UP.. if it doesnt say UP, then its not up. 

if not up, do this:

sudo ip link set wlan0 up 

To scan your wifi for networks:

sudo /sbin/iw wlan0 scan

if you want less details and only the ssid:

sudo /sbin/iw wlan0 scan | grep SSID


to be continued...


A little on-the-side below..

Something about apt-get, and libudev:
http://askubuntu.com/questions/441924/problems-with-libudev0-libudev0i386-libgudev-1-0-0-libgudev-1-0-0i386-breaks

and something about dpkg, the debian package manager:
http://askubuntu.com/questions/173992/how-do-i-remove-only-one-specific-package-with-apt-get