At 09:02 PM 7/10/00 +0700, you wrote:
>Apakah ada virus yang jalan di linux?? Saya yakin di linux pasti banyak
>virusnya juga kayak di windows.
>namun penyebarannya tidak secepat di win. kenapa? karena 90% pemakai
>pc-desktop dunia berbasis windows.
mendingan sebelum yakin yakinan, coba baca ini
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http://librenix.com/?inode=21
Why aren't the existing Linux viruses[1]
anything more than
a topic for conversation?
Why don't they affect you in your daily
computing in the way
that MS viruses affect
Windows users?
There are several reasons for the non-issue of
the Linux
virus. Most of those reasons a
Linux user would already be familiar with, but
there is one,
all important, reason that a
student of evolution or zoology would also
appreciate.
First, let's take a look at the way Linux has
stacked the
deck against the virus.
For a Linux binary virus to infect executables,
those
executables must be writable by
the user activating the virus. That is not
likely to be the
case. Chances are, the
programs are owned by root and the user is
running from a
non-privileged account.
Further, the less experienced the user, the
lower the
likelihood that he actually owns
any executable programs. Therefore, the users
who are the
least savvy about such
hazards are also the ones with the least fertile
home
directories for viruses.
Even if the virus successfully infects a program
owned by
the user, its task of
propagation is made much more difficult by the
limited
privileges of the user account.
[For neophyte Linux users running a single-user
system, of
course, this argument may
not apply. Such a user might be careless with
the root account.]
Linux networking programs are conservatively
constructed,
without the high-level
macro facilities that have enabled the recent
Windows
viruses to propagate so rapidly.
This is not an inherent feature of Linux; it is
simply a
reflection of the differences
between the two user bases and the resulting
differences
between the products that are
successful in those markets. The lessons learned
from
observing these problems will
also serve as an innoculation for future Linux
products as well.
Linux applications and system software is almost
all open
source. Because so much of
the Linux market is accustomed to the
availability of source
code, binary-only products
are rare and have a harder time achieving a
substantial
market presence. This has two
effects on the virus. First, open source code is
a tough
place for a virus to hide.
Second, for the binary-only virus, a newly compiled
installation cuts off a prime
propagation vector.
Each one of these obstacles represents a
significant
impediment to the success of a
virus. It is when they are considered together,
however,
that the basic problem
emerges.
A computer virus, like a biological virus, must
have a
reproduction rate that exceeds its
death (eradication) rate in order to spread.
Each of the
above obstacles significantly
reduces the reproduction rate of the Linux
virus. If the
reproduction rate falls below the
threshold necessary to replace the existing
population, the
virus is doomed from the
beginning -- even before news reports start to
raise the
awareness level of potential
victims.
The reason that we have not seen a real Linux
virus epidemic
in the wild is simply that
none of the existing Linux viruses can thrive in
the hostile
environment that Linux
provides. The Linux viruses that exist today are
nothing
more than technical curiosities;
the reality is that there is no viable Linux virus.
Of course this doesn't mean that there can never
be a Linux
virus epidemic.[2] It does
mean, however, that a successful Linux virus
must be
well-crafted and innovative to
succeed in the inhospitable Linux ecosystem.
[1] Bliss is the only Linux-compatible virus
seen in the
wild. Staog is the first known
Linux virus.
[2] For another perspective on this issue, try
this article
on freshmeat.net.
-Ray Yeargin
from Ray, June 10, 2000 (score:10)
(Updated: June 13, 2000)
[mail this link] (inode #21)
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PS: kalau reply email tolong quote nya dipotong dong, saya perhatikan anda
paling jarang motong quote ?
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