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RPM commands

Posted 06-03-2011 at 03:41 AM by blue_print
Updated 06-03-2011 at 04:23 AM by blue_print

RPM package is a powerful utility to manage the software in all major Linux distributions. RPMs can be used to,
  • Install packages
  • Remove packages
  • Upgrade packages
  • Verify packages

Here are some useful command to manage RPM packages,

1. Getting detailed information about the package httpd

rpm -qi httpd
2. Determining which package installed the file /etc/httpd/conf.d/httpd-portal.conf,

Posted in Linux Basics
Views 857 Comments 0 blue_print is offline

hiding the GUI of an application

Posted 06-03-2011 at 02:11 AM by neonsignal

The GUI of an X windows application can be 'hidden' by creating a dummy frame buffer:
Xvfb :display-number -screen 0 1x1x8
This frame buffer can then be used to run the application:
DISPLAY=:display-number application
Senior Member
Posted in Uncategorized
Views 577 Comments 0 neonsignal is offline

Usability Problems With Unity

Posted 06-02-2011 at 11:35 AM by MTK358
Updated 06-02-2011 at 11:39 AM by MTK358

I think that the sidebar is really confusing. When you click on an icon, it launches the app. You click on it again, and it brings that app to the top. There's no obvious way to start another instance (you have to right-click). If there are multiple instances of an app open, you have to go through two steps to choose it: first click on the icon, then on the instance you want. Why combine the unrelated concepts of launching a process and window management?

Second, the way the menubar...
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Posted in Uncategorized
Views 2682 Comments 1 MTK358 is offline

beep in ubuntu

Posted 06-02-2011 at 06:24 AM by sumeet inani
Updated 06-02-2011 at 06:29 AM by sumeet inani

I wanted to hear beep from my sound card with speaker unattached

echo -e "\a"
Dos not work in any case.

I installed package 'beep'.
Run 'lsmod' to see if the module "pcspkr" is loaded by kernel.
(maybe because '/etc/modprobe.d/blacklist.conf' contains 'blacklist pcspkr').
In my case it wasn't.
So I ran
sudo modprobe pcspkr
Now beep can be heard.
If you want to get info about...
Posted in Uncategorized
Views 930 Comments 0 sumeet inani is offline

playing video on the desktop background

Posted 06-01-2011 at 08:29 AM by neonsignal

The '-rootwin' flag can be used with mplayer to play moving images on the desktop background.

mplayer -rootwin -nosound -loop 0 -vf scale=width video.avi
Some desktop environments will need to have the normal background management disabled.
Senior Member
Posted in Uncategorized
Views 3414 Comments 1 neonsignal is offline


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