Explain the concept of run levels and briefly describe them.

Have you tried using Google for this yet ?

the VERY FIRST hit for "linux run levels"
is
http://en.wikipedia.org/wiki/Runlevel
the second hit
http://www.ibm.com/developerworks/li...pic1-v3-101-3/

but this is only for the OLDER int systems
runlevels are NOT used in new systems any longer

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Sorry what? I beg to differ..

Did I misunderstand that statement?

systemD
systemctl

freedesktop
http://freedesktop.org/wiki/Software/systemd/

the arch wiki page
https://wiki.archlinux.org/index.php/Systemd

though there is some accommodation to mimic the runlevels
like adding a 3 to the end of the boot line

there is not really a runlevel 1 ,3 ,5


and it is going to take a bit of time to RELEARN the start up

Right, thanks for reminding me! So many new things all the time. I quite like System V though, but most distroes have moved to Systemd, including Mageia that I use nowadays.

First it was Lilo to Grub and now Grub2.
Initrd and initram.
System V and Systemd.
Mnt and Media.
HAL and udev.

And now one that I really have big hopes for. Moving away from Xorg. I like X and find it to be a good method of doing things, and when I moved from Windows in the old days, it really made me clearly understand the difference between a Kernel, userland, graphical server and desktop environment. I have high hopes for Wayland and hope they come true, although I have to admit I don't really understand the specifications for Wayland quite yet. But if it will be as clean as I hope and empower the desktop creators and hardware, then it will be another wonderful addition.

I best jump into systemd

thanks.

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