How do I set a system-wide proxy in Ubuntu 14.04 using the terminal screen?

Set the following environment variables: 

export http_proxy=http://proxy2.somedomain.com:8080
export https_proxy=http://:proxy2.somedomain.com:8080

Problems with RTL8169 after Ubuntu 11.10 upgrade -- SOLVED!

I recently encountered a problem with my onboard LAN controller after installing Ubuntu 11.10.

root@WATCHER:/home/val# lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 11.10
Release:    11.10
Codename:    oneiric
root@WATCHER:/home/val#

I have a dual-boot setup with Windows XP. My PC is wired to the router.

The culprit

PROBLEM:  After booting to Linux, no link can be detected from my LAN controller to the router.

TRIAL #1: I tried booting to Windows and to my horror the LAN controller appeared to be really dead! CONCLUSION: LAN is FRIED!

TRIAL #2: I tried resetting the BIOS defaults and enabled/disabled LAN after several reboots but it was really dead no matter which OS I booted to! CONCLUSION: LAN is REALLY FRIED!

TRIAL #3: In my frustration, I shut down the PC, UNPLUGGED the POWER CORD and was thinking of getting a USB wireless adapter. A few minutes later, I was still not ready to give up and POWERED UP the PC to try another trick.  Miraculously, the LAN controller worked!!! CONCLUSION: LAN is still OK!

Explanation (after some investigation):

My chipset is RTL8169 (Realtek) and there is a bug submitted here.

It seems that Windows is disabling the NIC WAKE-ON LAN during shutdown and is the only one that can enable it during the next Windows boot.  Linux is not checking this state so it cannot detect the NIC when you reboot to Linux after a Windows session.

The hard solution is:

1. unload driver - rmmod r8169
2. load the driver again - modprobe r8169

The easy solution is to POWER OFF (unplug!) your PC for a few seconds and the NIC will forget its settings causing Linux to detect its original state.


Whew! Total time wasted: 1 hour 45 minutes.

How to install Vulture's Eye in Ubuntu 10.10

UPDATE:  This should work also for Ubuntu 11.04. Please let me know if it doesn't.

Here's a guide to installing and playing nethack with isometric tiles.

1. Download the latest source code here. It is a 7z compressed archive.

2. Open a terminal and install the 7-zip utilities

$ sudo apt-get install p7zip

3. Install the dpkg-dev package.  This is needed to build a .deb package from the vulture's eye source code that you have downloaded earlier.  Just answer "Y" when prompted.

3. Install other essential packages for building this game.  Expect a download of 18Mb.

$ sudo apt-get install debhelper libsdl1.2-dev libncurses5-dev bison flex libpng12-dev libsdl-mixer1.2-dev libsdl-ttf2.0-dev

4. Extract the game source code and put in your home directory, i.e. /home/valman

5. Go to the source directory and run the patch provided by the game developers.

$ patch -Np1 -i dist/linux/debian/debian.patch

6. Now, still in the game source directory, let's build the package!  Expect to wait for a few minutes while your computer compiles the C++ code.

$ sudo dpkg-buildpackage

7. Now, go to your main downloads directory where you saved the file downloaded in Step 1.  You should see a listing of .deb packages there.

8. Install the game data package

$ sudo gdebi vultures-data_2.1.90-1_all.deb

9. Install the game package (same as above)

$ sudo gdebi vultureseye_2.1.90-1_i386.deb

10. Play the game! It's the Applications > Games > Vulture's Eye

Have fun!!


//ValMan