'apt-get' does not work with Proxy

For my corporate network I was given by my administrator the proxy name in the format:

http://[username]:[password]@[proxy-webaddress]:[port]

For our Windows network our username is in the format:

[domain]\[username]

For example:

http://mywindowsdomain\fossfreedom:[email protected]:8080

This was added to the following NEW file (it doesnt exist by default):

gksudo gedit /etc/apt/apt.conf.d/01proxy

The following text was added:

Acquire::http::Proxy "http://mywindowsdomain\fossfreedom:[email protected]:8080";

If you are using an anonymous proxy then you don't need your login credentials:

Acquire::http::Proxy "http://askubuntu-proxy.com:8080";

Save the file and then checked that all was ok with:

sudo apt-get update

I have found that USERNAME and PASSWORD entered into the "Network Proxy" applet does not get stored into the apt.conf file you must manually add the username and password in the /etc/apt/apt.conf file.

The "Network Proxy" applet only stores the hostname and the port.

The basic syntax is

Acquire::http::proxy "http://User:Password@host:port/";

Acquire::ftp::proxy "ftp://User:Password@host:port/";

Acquire::https::proxy "https://User:Password@host:port/";

If you are using Windows usernames and password follow this advice:

User = Domain/Username

(windows users use / not \)

If you are using Windows strong/complex password with special characters you must use the URL encoding for the values, for example an "@" in the password would be "%40".

Try setting http_proxy to http://user:pass@proxyserver:port/

edit:
If setting http_proxy does not work try editing apt.conf. In
Ubuntu apt.conf is fragmented in /etc/apt/apt.conf.d/ directory.
In this directory edit /etc/apt/apt.conf.d/01ubuntu:

APT {
    Acquire {
        http {
            Proxy "http://user:password@server:port";
        };
    };
};

or try setting it using Synaptic: Settings -> Preferences -> Network
And then set your proxy settings in "Manual proxy configuration".

I'm behind a MS ISA proxy and I'm using Cntlm Authentication Proxy; in the apt.conf I have 4 lines; I've read somewhere that the last line must be empty, but I'm not sure about it. It works perfectly:

Acquire::http::proxy "http://127.0.0.1:3128/";
Acquire::ftp::proxy "ftp://127.0.0.1:3128/";
Acquire::https::proxy "https://127.0.0.1:3128/";

cntlm has a discovery option that helps find the right config to work with the NTLM auth of your network, try this:

cntlm -I -M http://test.com

copy and paste the results in /etc/cntlm.conf

restart cntlm

How to apply apt-get update or install in Ubuntu ? I was behind a proxy server and after installing Ubuntu i coulden`t update or install anything using the apt-get command. After searching i found that The apt package has been changed, now there is no more apt.conf on /etc/apt directory.

What i did to resolve this issue is the follow :

Open terminal and the file

sudo -H gedit /etc/bash.bashrc

and add at the bottom of the file these 2 lines :

#proxy 
export http_proxy=http://user:password@host:port/
export ftp_proxy=http://user:pass@host:port/

Now save and exit, Now you will be able to update, upgrade or install packages in Ubuntu

1. Open terminal and add the following lines to /etc/apt/apt.conf.

   gksu gedit /etc/apt/apt.conf
   

2. Add these 2 lines:

   Acquire::http::Proxy "http://user:pass@proxy-host:port/";
   Acquire::ftp::Proxy "http://user:pass@proxy-host:port/";
   

3. Save and exit.

   Now apt-get update and should work behind a proxy, but you will notice that still something is not working, that is the add-apt-repository command.

   To be able to add repository behind a proxy, type the following commands:

   # export https_proxy="http://192.168.1.5:8080"
   # sed -i 's/"keyserver.ubuntu.com"/"hkp://keyserver.ubuntu.com:80"/' /usr/share`/pyshared/softwareproperties/ppa.py`
   

   Now you can add repositories in Lucid and Natty using LANG=C add-apt-repository

   Example:

   root@ubuntu:~# LANG=C add-apt-repository ppa:motumedia/mplayer-daily

Via Unixmen

This one has been working for me!!

(adding proxy manually from the GUI via system-settings->network etc should work) But if doesn't and you export env variable from the terminal:

export http_proxy=http://<your proxy url>:<proxy port>

and again for https:

export https_proxy= <usually the same as the http>

Most important to add the -E: To run sudo apt-get install or sudo apt-get update you must run:

sudo -E <command>

The "-E" use your user environment variables for the root (sudo) , for that matter the http_proxy/https_proxy you've just exported.

Hope it helps :)

With a BlueCoat proxy, for me the format of the apt.conf file was required to look like:

Acquire::http::proxy "http://Domain%5cUserID:[email protected]:80/";
Acquire::ftp::proxy "ftp://Domain%5cUserID:[email protected]:80/";
Acquire::https::proxy "https://Domain%5cUserID:[email protected]:80/";

^ ^ ^ ^ Blank line after 3rd proxy line, do not enter this line. ^ ^ ^ ^

This one-liner solution worked for me:

sudo env http_proxy=http://<ip>:<port> apt-get update