Internet Good but update manager not good

Posted by Raja on Ask Ubuntu See other posts from Ask Ubuntu or by Raja
Published on 2012-06-28T14:32:39Z Indexed on 2012/06/28 15:24 UTC
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Filed under:

12.04

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update-manager

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usb-modem

I am using Ubuntu 12.04 . I am doing Internet with a USB Modem of 236kbps . My issue is , If i am accessing webpage through browser its good but if i am doing sudo apt-get update through terminal , its not responding & its just hanging there .I am unable to get whats my issue . help me to solve this .

one more thing , i am unable to change my dns also .

raja@badfox:~$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 220.226.100.40
nameserver 220.226.6.104
nameserver 127.0.0.1

I wanna replace them to dns ip's linked here http://www.cyberciti.biz/faq/free-dns-server/

see the picture to have some idea about my issue . enter image description here

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