Re: Nine linux questions
From: Jeffrey Silverman (jeffrey_at_jhu.edu)
Date: 12/10/03
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Date: Wed, 10 Dec 2003 11:39:00 -0500
On Wed, 10 Dec 2003 13:17:46 +0000, user245(AT)hotmail.com wrote:
> I've got some issues with RedHat9, hopefully someone can point me
> towards the right direction. Web searches have not been helpful so far.
>
> 1. How do I install new hardware without rebooting? I plugged in a usb
> camera and would like to know the command line/gui command to make it
> work, sort of like Windows "Add/Remove Hardware."
>
In the case of USB cameras that support the "USB MAss Storage Driver"
(Sony, Nikon, and I'm sure many others) you will have to do very little to
a stock Red Hat 9 install to mount the camera.
Try this:
1) Plug in camera to USB port, turn it on, wait a moment. Well, wait one
full minute, for kicks.
2) Open a terminal and type "mount /mnt/<TAB><TAB>" where <TAB> is
actually pressing the TAB key. you should see a list of possible
directories that are under the /mnt directory. Type the name that most
closely resembles "camera". The resulting final command is "mount
/mnt/camera"
3) Open a file manager or stick with the terminal and browse (change
directory) to the directory you just mounted. "cd /mnt/camera" in my
example.
If these steps don't work, please post again with exactly what you did,
exactly, VERBATIM, error messages, etc.
> 2. How can I change the path on root? I dont know where its .profile
> file is as it has no home folder. Sometimes when I do an su I can even
> run ifconfig. Also can I just do a SUDO that lasts 10 hours or so, when
> I know I'll be doing a lot of installing and changes?
>
try "su -"
that is, add a hyphen after the command "su". This will do a full login
and process the profile.
> 3. What is the "best practice" when installing software? Should I just
> be content to leave the stuff in /home or should I be putting them in
> one of the /bin directories?
It varies widely. Generally, binary package installs (e.g.
OpenOffice.org) should go in /opt/ . Source installs in /usr/local/
(i.e. configure; make; make install). And RPM installs go wherever the RPM
tells them to. You can do whatever you like; but write it down!
>
> 4. Is there a wireless driver that lets me save multiple keys for
> multiple access points and automatically scans for open APs like WinXP's
> wireless manager?
Don't know.
>
> 5. How can I get root priveldges while using Gnautilus? I'd like to be
> able to edit .conf files and such within the GUI framework. Mandrake
> has a file browser with root privs but I have not seen this anywhere on
> RH9. I guess I can login as root, but that doesn't seem like much of a
> solution. Of course I can SU while in a term window but then I'm stuck
> using apps like MC and Nano while the nifty GUI apps go unused.
>
su -
(password)
nautilus
Or
sudo nautilus
I don't see why you can't use nautilus as root. Have you tried typing
nautiuls in a terminal when su'ed as root?
> 6. If I generate my own SSL cert for S/MIME will others be able to use
> it without security warnings saying it not might be me?
>
You need to exchange SSL certs in a secure fashion with other computers.
Secure can be as simple as putting on floppy, physically going to other
computer, copying it to that computer.
If an SSL cert is not verified by a known authority then most client
programs will give an error regardless.
> 7. Just out of curiousity, why does whereis work so fast? Does Linux
> keep a database of where every file is stored? I'm using Ext3.
>
Don't know how whereis works, really. Other programs to use to get
similar results are "locate" and "find".
> 8. Is there a document explaining why the filesystem is setup as it is?
> For instance why is there both /bin and /sbin? What does /usr stand
> for? etc
>
Yes. Google on that one. A lot of unixy names come from the era of small,
expensive memory space. /usr is a character shoter than /user and one
byte really did make a difference in 1973. Heck, in 1983. Even in 1993,
frankly.
> 9. Can I create encrypted directories/folders? Does GPG do this?
>
GPG does not do this, AFAIK. but i'm pretty sure it can be done.
> Any info would be greatly appreciated.
There you go, some info.
--
Jeffrey D. Silverman | jeffrey AT jhu DOT edu
Website | http://www.wse.jhu.edu/newtnotes/
- Next message: Noi: "Re: file association"
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