How Linux is multi user operating system ?
 

Hi Experts,

I am new in linux....I am eager to know about Linux functionality
Everyone says that Linux is Multi User Operating system. How ?

I heard that linux can login only 7 or 12 Maximum user at
same time. it depend on Clrl + Alt + F1 to 12 ??
Am i right ?

Somebody says linux can handles 65.000 users for 2.4 kernels,
and 4 billion for 2.6 kernels...
i am very confuse in this Topic so please help me ?

Because multiple users can use the system, even in the same time (and each of them can run multiple processess). It has nothing to do with the virtual terminals (Alt+F1..Fn) -- those aren't meant to be used be different people. Usually there is many remote users and zero or one local user; the remote users use telnet/ssh/rlogin or special programs such as smtp, ftp, httpd etc

thanks Nevem for reply,

That what does mean of Clrl+Alt+F1 to 12 in Linux...

> That what does mean of Clrl+Alt+F1 to 12 in Linux...

They switch between virtual terminals / X-terminals. They are all for the single local user's convenience.

Hi nevem,

You mean to say, Clrl + Alt + F1 to 12 terminals only usable for Single user. am i right ?
How these all virtual terminals are differ from each other.....Plz explain with simple example ?

You can run different programs on them. Eg:

#1: mcedit program.c
#2: make
#3: man printf
#4: man scanf
#5: /usr/games/robots

Hi Nevem,

I am planning to connect 6 monitors without CPU to Linux OS computer.
so that each user can work seperatly.
how to do this ? what will be the Hardware requirements like
Card..........

No idea. I think you should ask a HW expert, but I guess it will cost you much more than buying six normal PC.

Hi Nevem,

Currently we are accessing Linux OS computer through SSH from other computers(Monitor + CPU).
But now i want to use Multiuser functionality of Linux so i am planning to access linux Computer
through monitors + keyboard only. is it practically possible ?

Here is some documentation on multiseat.

http://wiki.x.org/wiki/Development/D...tion/Multiseat

Perhaps possible, but quite likely very expensive. Especially if it is only for experimenting.

PS: Yet another way to use your linux box remotely: X protocol (eg:http://mobaxterm.mobatek.net/)

Hi Nevem,

As you said earlier that Virtual Terminal "Clrl + Alt + F1 to 12 only usable for Single user who are currently working.
am i right ? there are no involvement of other users...............

Second question, how many users access single Linux OS Graphically mean to say GUI mode ?

Why, can you imagine two or more people using the same keyboard and monitor taking turns in every few seconds? Well, I cannot.

Hi nevem,

Plz read my question once i added one more thing.......

There are many possibilities:
- you can run two (or more) X-sessions on two (or more) monitors
- one X-session can cover two (or more) monitors
- you can run more than one X-sessions with only one monitor (and switch between them with Ctrl+Alt+F6,F7,...)

+1: X protocols allow you to run GUI-programs remotely (eg: you can play with ksokoban or xbill on a Windows PC)