Short note on Configuring Linux inside IITM

Two things to configure:
a) Make software installation work for Ubuntu Software Center, apt-get, synaptic package manager etc..
b) Configure proxy for Internet access
First Open network proxy from System>preferences/Administration & choose No Proxy and apply systemwide.

Configure Software installation or updates.

1)Open Terminal  & type following lines,
   cp /etc/apt/sources.list sources.list.bak

   sudo gedit /etc/apt/sources.list

2)delete all lines and add following in the file
  deb ftp://ftp.iitm.ac.in/ubuntu onieric main multiverse universe restricted

  deb ftp://ftp.iitm.ac.in/ubuntu onieric-updates main multiverse universe restricted

  deb ftp://ftp.iitm.ac.in/ubuntu onieric-security main multiverse universe restricted

3)Save the file & close.
4)type following in terminal
   sudo apt-get update

Now you can open Ubuntu Software center and start installing applications or updates. If you want synaptic package manager, search in Ubuntu Software center and install (or type this in terminal "sudo apt-get install synaptic").

  Configure Proxy for Internet access

1) In  Ubuntu Software center, search dconf and install.
 (or in synaptic, search dconf-tools and install)
(or type these in terminal  "sudo apt-get install dconf-tools")
2) In terminal type
    dconf-editor
3)Within dconf-editor, goto “system > proxy” and change “mode” to manual.
   Then select “use-same-proxy”
   After that, go to “system > proxy > http”, enter your proxy information and   select “enable”.
   Make sure ftp, https and socks have “0″ (zero) on “port” and nothing on “Host” field
4) close dconf-editor & start using Internet.
To configure Proxy for Firefox.
  1)Open Edit>Preferences>Advanced>Network. Click Settings.
  2)Choose manual configuration, check "use this for all protocols"
  3) Enter the proxy information & port 3128

Your doubts in comments are welcome.