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Old 02-21-2010, 02:30 PM   #1
saminbama
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Newbie, sort of has a question...


I was going to read the FAQs but the Welcome screen suggested posting my first question instead.

I have plenty, but I will keep it brief.

I am currently (while I type this) running a live CD version of KNOPPIX. Is that Linux? How come all the little programs have different companies, such as LXPanel 0.5.4.1, Iceweasel, Transmission 1.82 (10007), et. al.

When I typed this command, I get this output:

knoppix@Microknoppix:~$ cat /proc/version
Linux version 2.6.32.6 (root@Knoppix) (gcc version 4.4.3 20100108 (prerelease) (Debian 4.4.2-9) ) #8 SMP PREEMPT Thu Jan 28 10:51:16 CET 2010
knoppix@Microknoppix:~$

What does all that mean? I just want to install an Adobe Flash add on for Iceweasel.

When I do, I get this message and then Synaptic Package Manager opens but then I don't know how to proceed:

"The '/usr/sbin/synaptic' program was started with the privileges of the root user without the need to ask for a password, due to your system's authentication mechanism setup. It is possible that you are being allowed to run specific programs as user root without the need for a password, or that the password is cached.
This is not a problem report; it's simply a notification to make sure you are aware of this."

I obviously need some refreshers and basics. The last time I used Unix/Linux it had no GUI.

When would you use administrator terminal (SU?) over regular terminal?

Thanks!

Sam

Last edited by saminbama; 02-21-2010 at 02:34 PM. Reason: ease of reading
 
Old 02-21-2010, 02:42 PM   #2
yancek
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Quote:
I am currently (while I type this) running a live CD version of KNOPPIX. Is that Linux?
It is one version, there are hundreds of different versions and you can get some info on this by clicking "Distro Reviews" on the right of this page and also by googling "distrowatch" and going to their web site.

Quote:
How come all the little programs have different companies
They're not companies, they are referring to software packages for specific functions.

Quote:
Linux version 2.6.32.6 (root@Knoppix) (gcc version 4.4.3 20100108 (prerelease) (Debian 4.4.2-9) ) #8 SMP PREEMPT Thu Jan 28 10:51:16 CET 2010
The Linux version number is the version of the Linux kernel being usedd, the gcc is its version and Knoppix is based on the Debian Linux OS and that is its release version.

Quote:
I just want to install an Adobe Flash add on for Iceweasel.
Where? You are using a Live CD which isn't writable, or did I miss something?

The part about using Synaptic without a root passwrod is probably because Knoppix runs as root by default, usually when using Linux you need a root password to make system changes. Are you planning to install Linux to your hard drive? Knoppix is good and has its uses but isn't really designed to be installed permanently to a hard drive.
 
Old 02-21-2010, 02:58 PM   #3
saminbama
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flash...

I want to install Flash plug in so I can browse the web and go to YouTube

Quote:
Originally Posted by yancek View Post
It is one version, there are hundreds of different versions and you can get some info on this by clicking "Distro Reviews" on the right of this page and also by googling "distrowatch" and going to their web site.



They're not companies, they are referring to software packages for specific functions.



The Linux version number is the version of the Linux kernel being usedd, the gcc is its version and Knoppix is based on the Debian Linux OS and that is its release version.



Where? You are using a Live CD which isn't writable, or did I miss something?

The part about using Synaptic without a root passwrod is probably because Knoppix runs as root by default, usually when using Linux you need a root password to make system changes. Are you planning to install Linux to your hard drive? Knoppix is good and has its uses but isn't really designed to be installed permanently to a hard drive.
 
Old 02-21-2010, 03:12 PM   #4
salasi
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Quote:
Originally Posted by saminbama View Post
I am currently (while I type this) running a live CD version of KNOPPIX. Is that Linux?
Knoppix is a Linux variant (distribution). There are many of these; essentially Linux is a kernel and you need much more than a kernel to have a system that is useful for, eg, desktop computing.

If you have a Live CD, you will have difficulty installing programs permanently as the live CD will not be writeable. You could install it to your hard disk, or you could select a distribution that is intended for hard disk installation.

I'm not totally sure what would happen if you had your distro on a writeable CD...you probably wouldn't enough room to install anything useful, anyway.

Quote:
How come all the little programs have different companies, such as LXPanel 0.5.4.1, Iceweasel, Transmission 1.82 (10007), et. al.
A collection of programs...anyway, the ones that you quote look like program names, rather than companies.

When I typed this command, I get this output:


Quote:
Linux version 2.6.32.6 (root@Knoppix)
it is a linux kernel, and the version is 2.6.32.6, and it was probably compiled by someone known to his computer as root...

Quote:
(gcc version 4.4.3 20100108 (prerelease)
..using that compiler...

Quote:
(Debian 4.4.2-9) )
...based on that version of debian..

Quote:
#8 SMP PREEMPT
...the kernel is symmetrical multicore processor-capable...

Quote:
Thu Jan 28 10:51:16 CET 2010
...and that was the date on which it was compiled....all of which seem irrelevant to

Quote:
I just want to install an Adobe Flash add on for Iceweasel.
Quote:
When I do, I get this message and then Synaptic Package Manager opens but then I don't know how to proceed:
In principle, click on the thing that you want to add in synaptic, confirm that you want to do it and let it be done. However, using a live CD in Live CD mode, as mentioned earlier, the best outcome that I can see happening is that you have Flash until you reboot. OTOH, if this was a hard disk install, installing programs should just work. (I don't use either firefox or iceweasel, and there might be a wrinkle with getting Iceweasel to know that it should use flash, I'm not sure.)


Quote:
"The '/usr/sbin/synaptic' program was started with the privileges of the root user without the need to ask for a password, due to your system's authentication mechanism setup. It is possible that you are being allowed to run specific programs as user root without the need for a password, or that the password is cached.
This is not a problem report; it's simply a notification to make sure you are aware of this."
For any live CD, there is a problem having a secret root password, unless you can somehow customise it at build time. If anyone, or more specifically potential miscreants can know the root password, insisting on the end user supplying the root password for administrative tasks is basically just an annoyance for the user, and you are being told that, somewhat obliquely.

If you are concerned about the security aspects of this, on the one hand, you do not have the extra protection that needing to know this extra piece of information before making system alterations could give. OTOH, if the problem has started because the CD is non-writeable for you, there is the protection given by the fact that it is not writeable
for malefactors too.

Quote:
When would you use administrator terminal (SU?) over regular terminal?
Substitute (or switch) User gives you the power of the user to whom you switch. Separating the really 'can destroy anything' power from the 'ordinary user' power is part of the security model used in most unix-like OSs.

With great power comes great responsibility.
 
Old 02-21-2010, 03:28 PM   #5
saminbama
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Registered: Feb 2010
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"just works..."?

"OTOH, if this was a hard disk install, installing programs should just work. (I don't use either firefox or iceweasel, and there might be a wrinkle with getting Iceweasel to know that it should use flash, I'm not sure.)"

can you bring it down another level; what do you mean "just works" what do you click on or access or open or navigate to? None of the files have extensions so you don't know which one is the installer.

Thanks.


Quote:
Originally Posted by salasi View Post
Knoppix is a Linux variant (distribution). There are many of these; essentially Linux is a kernel and you need much more than a kernel to have a system that is useful for, eg, desktop computing.

If you have a Live CD, you will have difficulty installing programs permanently as the live CD will not be writeable. You could install it to your hard disk, or you could select a distribution that is intended for hard disk installation.

I'm not totally sure what would happen if you had your distro on a writeable CD...you probably wouldn't enough room to install anything useful, anyway.



A collection of programs...anyway, the ones that you quote look like program names, rather than companies.

When I typed this command, I get this output:




it is a linux kernel, and the version is 2.6.32.6, and it was probably compiled by someone known to his computer as root...



..using that compiler...



...based on that version of debian..



...the kernel is symmetrical multicore processor-capable...



...and that was the date on which it was compiled....all of which seem irrelevant to





In principle, click on the thing that you want to add in synaptic, confirm that you want to do it and let it be done. However, using a live CD in Live CD mode, as mentioned earlier, the best outcome that I can see happening is that you have Flash until you reboot. OTOH, if this was a hard disk install, installing programs should just work. (I don't use either firefox or iceweasel, and there might be a wrinkle with getting Iceweasel to know that it should use flash, I'm not sure.)




For any live CD, there is a problem having a secret root password, unless you can somehow customise it at build time. If anyone, or more specifically potential miscreants can know the root password, insisting on the end user supplying the root password for administrative tasks is basically just an annoyance for the user, and you are being told that, somewhat obliquely.

If you are concerned about the security aspects of this, on the one hand, you do not have the extra protection that needing to know this extra piece of information before making system alterations could give. OTOH, if the problem has started because the CD is non-writeable for you, there is the protection given by the fact that it is not writeable
for malefactors too.



Substitute (or switch) User gives you the power of the user to whom you switch. Separating the really 'can destroy anything' power from the 'ordinary user' power is part of the security model used in most unix-like OSs.

With great power comes great responsibility.
 
Old 02-21-2010, 05:22 PM   #6
chrism01
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The main points are

1. don't worry about the version nums; they're nicely explained above

2. you've got a Live CD version (known as a distribution aka 'distro') of Linux. This is only designed to be run from a CD so you can get a feel for Linux. It's not really suitable for an install on your hard drive.
The CD is NOT writeable, so you can't install stuff in the normal way.

3. The best thing to do (if you now like Linux) is to go to www.distrowatch.com and pick something of the top 10 and try it on your hard disk ie burn it (as an ISO .img file) to a CD/DVD and install it from the CD/DVD onto a normal hard disk.
By default you should end up with a GUI which will include a tool to do further application/tools installs.
Tell us which distro you've chosen and we'll be able to give you more specific help.
 
Old 02-21-2010, 06:16 PM   #7
onebuck
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Hi,

Just a few links to aid you to the road of understanding;

Linux Documentation Project
Rute Tutorial & Exposition
Linux Command Guide
Utimate Linux Newbie Guide
LinuxSelfHelp
Getting Started with Linux
Advanced Bash-Scripting Guide
Linux Home Networking


The above links and others can be found at 'Slackware-Links'. More than just SlackwareŽ links!
 
1 members found this post helpful.
Old 02-22-2010, 06:11 PM   #8
salasi
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Quote:
Originally Posted by saminbama View Post
can you bring it down another level; what do you mean "just works" what do you click on or access or open or navigate to?
Just works, as in just works. You do:

Quote:
click on the thing that you want to add in synaptic, confirm that you want to do it and let it be done.
and it does it.

So, open synaptic. There is a list of things that you could install. Select some. It installs them, probably after asking you to confirm.

Quote:
None of the files have extensions so you don't know which one is the installer.
..and you ignore these, unless the items that you want don't appear in synaptic. And anyway that is probably only a matter of adding a repository for the 'community' or 'non-free' items.
 
Old 02-23-2010, 07:09 AM   #9
cantab
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To contradict what has previously been said - you probably can install the Flash Player fine (provided your Knoppix version is reasonably recent). But it will only be installed until you reboot. If the install process is simple, that's not too much of an issue. (I've compiled software from source in a LiveCD environment, it worked fine.)
 
Old 02-23-2010, 08:33 AM   #10
thorkelljarl
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Just to give you an impression...

If you want to try a live-cd that will give you an idea of what an installed linux installation can do, you might try PCLinuxOS. It has several of the packages that are not usually included in a live-cd already configured and ready to function upon booting. This includes flash and the proprietary Nvidia driver.

live-cds have several uses, one of which is to introduce the distribution to a potential user, but there may be a marked difference in the look, feel and function between the live version of a given linux and its installed version.

An installation may include different packages, added proprietary packages and drivers, and the many changes that a user may choose to make, A live-cd is an impression, not the expression of what a distribution can and is when installed.

http://pclinuxos.com/

There are many flavors of linux to choose among.

http://www.livecdlist.com/
 
  


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