X Server

Linux: Configure Xorg X11 Window System

by Vivek Gite on May 13, 2010 · 3 comments

My xorg.conf file is missing as I deleted accidentally for some reason. Now, Xorg try to probe my hardware on every startup. How do I configure Xorg under Debian or any Linux distro / operating systems?

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I‘d like to only allow ssh or console based login (ssh, su, sudo commands) but restrict specific users from using GDM / KDM / X Windows based login under Linux operating systems. How do I stop direct GUI user login using GDM / KDM / X Windows login managers and only allow text based logins?

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Linux / UNIX: Run Multiple X Sessions

by Vivek Gite on April 28, 2010 · 5 comments

How do I run multiple X Session under Linux or UNIX operating systems? How do I switch between X sessions?

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I need Photoshop alternative under Ubuntu Linux for basic editing. I know Photoshop can be run using Wine but I’m not able to afford expensive software for just basic editing. Can you suggest a few free FOSS apps that works as alternatives to Photoshop under Ubuntu or Fedora Linux desktop operating systems?

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I revived my new Dell server pre installed with Red Hat Enterprise Linux server v5.2. However, my box boot with a GUI login system ( Gnome ). There is no reason to run X Windows on my dedicated mail and Apache web server. I only need ssh. How do I disable X login and windows without reinstalling the operating system to improve security and performance?

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I‘ve ssh gateway behind my NAT firewall. So all users must first login to my gateway host from the internet and then login to other machines on the LAN. This works great for cli based apps. However, few users would like to run x apps from internal LAN hosts and tunnel X display through intermediate ssh gateway and display back output on their local system. For example, from localsystem user makes connection as follows:

ssh -X user@gateway.example.com
ssh -X user@somelan.example.com

X forwarding fails with an error:

Error: Can’t open display:

How do I fix this problem and allow users to use X apps with my intermediate Linux / BSD gateway?

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Linux ATI HD3750 Drive Configuration Hangs

by Vivek Gite on January 12, 2009 · 0 comments

I’m not able to boot into GUI under Dell desktop system, which uses an ATI HD3750 display card. The display only works with CLI and but when I type startx and get some sort of error or a black screen. How do I fix this issue?

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