wait.
why would the system create elements tied to those not actually using
the system?
Forgive my lack of information here, but would that not be a security
risk?
If they were not created by me, who would create them?
I have no means for typing that command, but I am curious about the
concept.
Karen
On Sat, 24 Jan 2015, John G. Heim wrote:
> Multi-user just means that each process is owned by a user. Some
> user ID is tied to each process. Most of the processes are owned by
> users you probably didn't create directly. Examine the /etc/passwd
> file to see all the users on your system.
>
>
> On 01/24/2015 01:36 PM, Karen Lewellen wrote:
> > Hi,
> > Why would I have a multi user system?
> > Oh wait I might know the answer to this one.
> > no. this box was built for me, I have an admin password, and I am
> > the
> > only user. Something I have done once from the computer itself. No
> > ssh
> > this time, I have no idea yet if the debian configuration on the
> > machine
> > even supports dsl.
> > I will be turning it on to find out.
> > I will want to turn it off again when I am through, so thanks for
> > all
> > the prospects.
> > While Halt seems like the most fun, better to just try shutdown -h.
> > Thanks,
> > Karen
> >
> >
> > On Sat, 24 Jan 2015, Tim Chase wrote:
> >
> > > On January 24, 2015, Karen Lewellen wrote:
> > > > what is the keystroke for leaving Linux basically to shut down
> > > > the
> > > > computer?
> > > > Unlike DOS, i understand you cannot just turn off the machine.
> > > > Depending on how new the computer is, you can usually just hit
> > > > the
> > > power button to initiate a shutdown (as opposed to holding it in
> > > for
> > > 3-5 seconds which does a hard power-off). The press (rather than
> > > press-and-hold) sends a shutdown signal to the operating system.
> > > > If you want to initiate it from the command-line or over SSH,
> > you can
> > > usually use one of "halt", "reboot", or "shutdown". You might have
> > > to prefix it with "sudo" because on a multi-user system, it would
> > > be
> > > rude to allow any old user to reboot it out from under other users.
> > > I usually use "halt" to power down the machine, and "reboot" to,
> > > well, reboot (that's rare). The "shutdown" command allows for
> > > additional options like sending messages to users that are logged
> > > in,
> > > deferring the shutdown for a period of time, etc.
> > > > So those are the graceful ways to shut down.
> > > > That said, if you're running a modern vintage of Linux, it
> > should be
> > > fairly robust to handling abrupt power-offs. Mostly it boils down
> > > to
> > > things that your software thinks has been written to the drive but
> > > hasn't actually made it to the drive. If you use a journaling
> > > file-system (unless you're running a REALLY old version of Linux or
> > > you intentionally chose EXT2 or a FAT partition type on
> > > installation,
> > > you've likely have a journaling file-system since it's been the
> > > default for years). Also, if you have external drives like a USB
> > > drive, you'd want to make sure that either it's set to write
> > > synchronously or that you properly unmount it since it's usually a
> > > FAT file-system which can lose data.
> > > > And if you're booting off a live CD, doing all your work on the
> > > internet, and not actually saving anything locally? Feel free to
> > > unceremoniously rip the cord from the wall since there's nothing
> > > that
> > > won't be restored on a fresh boot. Though I still usually just do
> > > a
> > > regular shutdown out of habit. (grins)
> > > > -tim
> > > > > > > >
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> >
>
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