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life with ubuntu on a thinkpad T40

Archive for the ‘Networking’ Category

Remote X Applications

Posted by ubuntufan on August 17, 2007

I know, I know…I’ve disappeared for a while. Summer is busy for me and I had to…..well I really have no excuse, but I’m back again for at least a while.

As you may or probably do not know, my work environment is composed of 29 glorious, non-windows servers. A fair amount of them are Solaris 9 with a dusting of Solaris 10, with the rest being various Linux distros. I wish I could change them all to the same distro but everything works, so I won’t complain too much. I occasionally wander away from the command line and need to run an X application of some sort; usually an installer. No problem right? From a CLI, just type xhost + , ssh to the Solaris box I need, export the display and that’s it…run any X app you like. Wait…what’s this? Error: Can’t open display: ????

This was making me mad….I had to install Oracle and didn’t feel like having to dig around to find out what the problem was. I brought up my Chatzilla window and logged into #ubuntu ( a great place for answers) The solution was simple and I believe it is a new security “feature” in 7.04 ( but I’m not 100% sure) All you have to do is go to the system menu, click on Administration and then click on Login Window. From there, click on the security tab and un-check the “Deny TCP connections to Xserver” check box….that’s it. Everything will work as expected from there.

There is a chance that this could possibly be a security hole but it’s easy enough to toggle on and off when needed if you’re paranoid. Hope this helps.



Posted in Administration, Networking, ubuntu, xorg | 16 Comments »

Network Manager Applet Tips

Posted by ubuntufan on March 24, 2007

I know, I know…it’s been a while. I switched jobs and don’t have my T40 anymore. I was given a Dell Latitude D600 at my new job. This job is great..not a single windows server in the building 🙂 I was setting up the network manager applet and couldn’t get it to see my wireless interface. It would just say “no connection” After poking around the Google for a bit, I ran across the solution.

It appears that if you’ve already accessed an access point, the nm-applet won’t see your wireless interface. The solution? Edit /etc/network/interfaces. Find the section that has the line with your access point followed by your wep key, if applicable, and delete them…yep just whack em. Right click on the nm-applet icon and disable networking. Right click on it again, enable networking, and you should be set.

I used automatix2 to install the networ manager, but you can also use apt….I think it’s just apt-get install network-manager but someone correct me if I’m wrong

Posted in Administration, General Linux, Networking, ubuntu | Leave a Comment »