Learn How UNIX Multitasks

BlueVoodoo writes "On UNIX systems, each system and end-user task is contained within a process. Learn how to control processes and use a number of commands to peer into your system."

Comments

exciting

[Anonymous Coward]

Wow! ps, top, sleep, kill, PIDs? This is some pretty groundbreaking stuff here!

Re:exciting

[PPH]

Now, that wasn't very nice.

Re:exciting

[morgan_greywolf]

I especially liked this one:

$ ls -l /usr/bin/top
-r-xr-sr-x 1 root tty 19388 Mar 20 2005 /usr/bin/wall

Wow. That's a neat trick.

Re:exciting

[Matt Perry]

Don't forget to set the I_WANT_A_BROKEN_PS [rt.com] environment variable!

POSIX_ME_HARDER would have been a much better variable name.

Next...

[ari_j]

Learn how UNIX stores files. This revolutionary new article will show you how to use ls and cd, and you will walk away with a complete understanding of how files are stored. More magic demystified, indeed!

Re:Next...

[drinkypoo]

We had to eliminate that command because it was giving pedophiles ideas. From now on, touch will be replaced with echo redirected into a file. Just redirect nothing onto the end of a file to update the mtime... Won't someone think of the children?

know your sysadmin

[Anonymous Coward]

alias renice 'echo Renice\? You must mean kill -9.; kill -9 \!*'

please, hepl

[Anonymous Coward]

I get
"ps: Command not found"

What do to? Heeeeeelp.

Re:please, hepl

[EricTheGreen]

Try this instead:

"c:\program files\internet explorer\iexplore.exe" http://www.ubuntu.com/getubuntu/download

Hope this hepls....

Incredible!

[Wuhao]

With several businesses now owning their own Unix mainframes, and with some futurists speculating that hobbyists may one day have full-fledged Unix systems in their basements, a detailed understanding of Unix operation -- including its intricacies, like these "processes" -- becomes increasingly important, even for people not charged with the operation of one of these computational goliaths. I for one plan to study these "processes" carefully.

Re:Incredible!

[0racle]

Na, not behind the times, just missing something.

It's called a sense of humour.

Re:Incredible!

[Wuhao]

I envision there one day being a vast network of computers, accessible to all, containing limitless mountains of data -- and on this network, the common man will finally be able to communicate with his kinsmen worldwide and transcend all borders. Finally, free of the tyranny of governments and liberated from the logistics of contemporary communication, Mankind shall at last realize his full artistic potential. No more need a man hide his drawings of the horribly mutated, furry Mr. Spock and Captain Kirk engaged in sadomasochistic intercourse as they eject feces from their hermaphroditic nipples; it shall be available to all, stumbled across by those just trying to fi--

You know, now that I think about it, you're right. If you can get some torches and pitchforks together, I'll rally the townspeople, and we can storm Bell Labs.

random?

[flynt]

Is it just me, or is this one of the most random Slashdot articles ever posted? A link to Chapter 8 of an IBM manual on Unix development, really?

Re:Use the Firehose!

[gEvil (beta)]

Mod Parent Up! Vote Article Down!

Digg?

[loconet]

Did I mistype the URL? No, it does say slashdot.org. Odd... I should go back to bed.

In Other News...

[Ikcor]

How to master the "other half" of the keyboard using the newly discovered SHIFT key.

Segfaults

[Anonymous Coward]

If it helps, you can think of a process as its own sovereign nation, with borders, resources, and gross domestic product.

Does this mean that illegal immigrants are responsible for my processes segfaulting?

Re:Segfaults

[Anonymous Coward]

This is the traditional method. However, the new school of thinking is to use the "wall" program to limit access. E.g.,:

[gwb@usa] wall
Stay out, all of you!
^D

Message from gwb@usa:
Stay out, all of you!

On a side note, the new school of thinking works great with typical hack attempts. For example, if a user from systema (afgst) launches a remote exploit attempt, the new school suggests that you launch an attack against systemIRQ (interrupt request, for example). SystemIRQ has nothing to do with the attack, but that doesn't matter.

I need some help

[corecaptain]

I tried this program:

int main()
{
    while(1) fork();
}

but nothing happens?

Re:I need some help

[fuo]

this should fix it: int main() { while(fork() || !fork()) fork(); }

Re:How to learn unix...

[bberens]

Switch your shell to one with auto-completion and go through each letter of the alphabet, hitting tab after each one and then viewing the manual page for each command you don't already know.

How about: Bathe, get a girlfriend, go outside, read a 20 minute FAQ and learn more than most *nix sysadmins seem to know.

IBM had better be careful..

[Morky]

Doesn't SCO own the rights to this information?

Re:How to learn unix...

[Anonymous Coward]

How about: Bathe, get a girlfriend, go outside, read a 20 minute FAQ and learn more than most *nix sysadmins seem to know.

Ahhh, jealousy. How about you get off Slashdot and go do those pointless home improvements (or other activity) that your GF has been nagging about?

BTW: Enjoy your role as a Windows admin, bet the job satisfaction is overwhelming!

Re:Gee Whizzes

[loconet]

It offers our Windows-centric Slashdot breatheren a nice overview

John and Mark don't have net access on Mondays so they wouldn't have been able to read this article anyways.

Re:How to learn unix...

[Ngarrang]

How about: Bathe, get a girlfriend, go outside, read a 20 minute FAQ and learn more than most *nix sysadmins seem to know. My wife might have a problem with the second item...

A few days ago

[Tyr_7BE]

I saw slashdot transformed into Digg, with "slashdotit" links everywhere. That was supposed to be a joke, right? Because it's only funny the first time.