Linux Run Levels

so , what's the meaning of Runlevels?

Runlevels define what services or processes should be running on the system.

in other words : A runlevel is a software configuration of the system that allows only a selected group of processes to exist, Init can run the system in one of 6 runlevels.

Linux Documentation

Hi everybody!

This time let’s talk about something that every single Linux user – from the typical user to the system admin – almost use it everyday !!

Wow !! That’s cool. But, What is it?

Yeah as the title tels you, “Linux Documentation”.

So, What is the Linux Documentation? why we use it rapidly? and how to use it? that is what this post about.
We will not cover all Documentation tools in this post, but it will be followed by other posts to describe the next tools isA.

Nvidia is not working

yeah … sometimes kmod-nvidia conflicts with other packages

so you can’t install it directly

even when you go to nvidia site and try to install it to your linux, you’ll be disappointed because compiz and other 3d effects won’t work perfectly

so you’ll have to install the “akmod-nvidia” package

first, know what’s your kernel version by typing:

#uname -r

then install nvidia

for redhat based:

#yum install akmod-nvidia-#kernel number

in ubuntu:

apt-get install akmod-nvidia-#kernel number

note that the bold words are comments

you can try using:

yum install akmod-nvidia-$(uname -r)

instead of the two lines above (but i didn’t test this one)

regards …

flash plugin doesn’t support sound

Hello guys

Problem

you might install the flash plugin to enjoy watching youtube or whatever

but unfortunately, the sound is not working!!

Installing Virtualbox

Problem

i faced an error while installing Virtualbox on my fedora machine, and i could not create any virtual machines!!

but i found that there were some steps required to complete the installation

so i had to install some packages and do the steps

Solution

Permissions and umask

you might have found that sometimes you can’t -for example- copy (or write) files into X directory when you’re using your user

but at the same time you can copy files into the same X directory using the “root” user

so how do i get the permission for writing in X using any user … not root only!!