Connect Internet via Terminal

**intelligence storm** · January 9th, 2012

Hi all,
I want to write a script that would connect to the Internet when it runs so I have to know how to connect the internet via Terminal.
I've read a lot of posts, threads,....etc over the Internet but nothing could help me

As mentioned with this thread it solved for him and I tried the same commands but still not solved

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well, I added the commands here to /etc/network/interfaces:

Code:

auto lo iface lo inet loopback  auto wlan0 iface wlan0 inet dhcp wpa-ssid mynetworkname wpa-psk mypassphrase

but still the problem comes !!
it shows these messages:

Code:

No DHCPOFFERS received.
Trying recorded lease 192.168.1.100
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.

then how could I check if it connected or NOT ??

**KrisDouglas** · January 9th, 2012

Hello,

Your system should remember the fact that it is connected to the internet when it boots.

The questions I need to ask are do you use WiFi, an Ethernet cable, or a USB modem to connect?

**intelligence storm** · January 9th, 2012

It's WI-fi connection

Hmmm.....does that means if the script runs on other computer it does not work ??

**chili555** · January 9th, 2012

Is the interfaces file correctly formatted?

Code:

auto lo
iface lo inet loopback

auto wlan0 
iface wlan0 inet dhcp 
wpa-ssid mynetworkname 
wpa-psk mypassphrase

Is Network Manager removed?

You can check to see if you are really connected with:

Code:

ping -c3 www.google.com

**intelligence storm** · January 9th, 2012

Network-manger is not removed.
the format of file is correctly as you mentioned.
after write :

Code:

sudo ifdown wlan0 && sudo ifup wlan0

it tells:

Code:

ifdown: interface wlan0 not configured

but when type :

Code:

sudo ifup wlan0

it tells:

Code:

ifup: interface wlan0 already configured

!!!
The end of command run is :

Code:

No DHCPOFFERS received.
Trying recorded lease 192.168.1.100
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.

--- 192.168.1.1 ping statistics ---
1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms

No working leases in persistent database - sleeping.

**chili555** · January 9th, 2012

Network-manger is not removed.

Manual methods, that is, shell scripts, /etc/network/interfaces, etc. are very unlikely to work correctly as long as NM has a firm grip on your system. I can't do it and I know quite a bit about networking!