Selamlar
Bende obenbsd icin basit bir sey toparladim iso icin
umarim isinize yarar. Bende yeni test ediyorum bir sey olursa
artık duzenlersiniz.
Saygılarımla
M.Ali VARDAR

##############################################
#ftp://ftp.enderunix.org/pub/OpenBSD/3.8/
REL=3.8
RELP=38
mkdir OpenBSD
mkdir OpenBSD/$REL
mkdir OpenBSD/$REL/i386
cd ./OpenBSD/$REL/i386
ncftpget ftp://ftp.enderunix.org/pub/OpenBSD/$REL/i386/*
cd ../../..
mkhybrid -r -b $REL/i386/cdrom$RELP.fs -c "boot.catalog" -o
OpenBSD$RELP.iso OpenBSD
echo "iso hazir"
##############################################



> OpenBSD 3.8'i resmi OpenBSD ftp yansisi olan ftp.enderunix.org
> adresinden de indirebilirsiniz...
>
>
>
> Huzeyfe Onal wrote:
>
>>http://www.openbsd.org/38.html
>>
>>---------- Forwarded message ----------
>>From: Theo de Raadt <[EMAIL PROTECTED]>
>>Date: 01.Kas.2005 08:30
>>Subject: OpenBSD 3.8 released November 1, 2005
>>To: [EMAIL PROTECTED]
>>
>>
>>Go and get it!  (Please remember to check the primary mirrors
>>please -- thanks)
>>
>>------------------------------------------------------------------------
>>- OpenBSD 3.8 RELEASED -------------------------------------------------
>>
>>Nov 1, 2005.
>>
>>We are pleased to announce the official release of OpenBSD 3.8.
>>This is our 18th release on CD-ROM (and 19th via FTP).  We remain
>>proud of OpenBSD's record of eight years with only a single remote
>>hole in the default install.  As in our previous releases, 3.8
>>provides significant improvements, including new features, in nearly
>>all areas of the system:
>>
>>- Improved hardware support, including:
>> o New aps driver for the built-in accelerometer found in some IBM
>>ThinkPad laptops.
>> o New art driver for Accom Networks Artery T1 and E1 cards.
>> o New auixp driver for the ATI IXP series integrated AC'97 audio
>> controller.
>> o Basic RAID management using bioctl(8) in the ami(4) MegaRAID driver.
>> o New ciss driver for Compaq Smart ARRAY 5 and 6 RAID controllers.
>> o New epic driver for SMC 83C170 ethernet adapters.
>> o New ichwdt driver for Intel 6300ESB ICH watchdog timer.
>> o New pcn driver for the AMD Am79c97x (PCnet) ethernet adapters.
>> o New safte driver for SCSI Accessed Fault-Tolerant Enclosures, and a
>> rewritten
>>   ses driver for SCSI Enclosure Services, both allowing monitoring
>> through
>>   sysctl and sensorsd.
>> o New ueagle driver for Analog Devices Eagle ADSL modems.
>> o New uipaq driver for iPAQ USB serial.
>> o New viasio driver for VIA VT1211 LPC Super I/O hardware sensors.
>> o New zaudio driver for the built-in Zaurus audio CODEC.
>> o Improved com driver for serial port PCMCIA cards, such as cellular
>> modems
>>   on Zaurus.
>> o Improved support for many umass devices.
>> o Updated driver from X.Org for the Intel i810 family graphics chipset,
>>   including support for the external VGA output on laptops.
>>
>>- New tools:
>> o bioctl(8), a RAID management interface.
>> o ipsecctl(8), a simple IPsec management tool.
>> o stat(1), displaying file status obtained from stat(2) or lstat(2).
>> o hostapd(8), a wireless Host Access Point daemon.
>> o ifstated(8), a daemon monitoring ethernet interfaces status.
>> o watchdogd(8), companion to the hardware watchdog devices.
>> o ztsscale(8), a tool to calibrate the Zaurus touch screen.
>> o xidle(1), a tool to run a program on X inactivity.
>> o gzsig(1), create and verify cryptographic signatures built into
>>gzip file headers.
>> o sasyncd(8), a daemon to synchronize IPSec SA's for failover gateways.
>>
>>- New functionality:
>> o mount_udf(8), providing UDF (DVD) filesystem support.
>> o Network interface aggregation, using the virtual trunk(4) interface.
>> o Partial wide character and locale support in the C and C++ libraries.
>> o wd(4) disks have the security feature frozen before being attached
>>   to prevent malicious users setting a password that would prevent the
>>   contents of the drive from being accessed.
>> o On the OpenBSD/sparc64 platform, StackGhost buffer overflow exploit
>>   protection has been added.
>> o zaudio(4) changes the mute values if the headphones are plugged in or
>> out.
>>
>>- New functionality for ospfd(8), the Open Shortest Path First Daemon:
>> o ospfd is now able to redistribute static, connected and default
>> routes.
>> o ospfctl is now able to display all relevant information.
>> o Interoperability with cisco and Extreme has been improved.
>> o Support for parsing and displaying parsed configuration file,
>>similar to bgpd.
>> o Support for cryptographic authentication has been added.
>> o Interface finite state machine has been reworked, primarily to improve
>>   interoperability.
>> o The performance of the shortest path first calculation has been
>> improved.
>> o Numerous bugs have been discovered and fixed during the last 6 months.
>>
>>- New functionality for bgpd(8), the Border Gateway Protocol Daemon:
>> o bgpd is now able to redistribute static and connected routes
>> dynamically.
>> o Full route label support; pf(4) can filter based on information bgpd
>>   attaches to the routes.
>> o An additional per prefix weight has been added used to evaluate
>> prefixes
>>   with equal AS path length.
>> o New route decision tunable rde med compare always to force bgpd to
>> compare
>>   the MED independent of the peer AS.
>> o IPv6 support.
>>
>>- Assorted improvements and code cleanup:
>> o malloc(3) has been rewritten to use the mmap(2) system call,
>>   introducing unpredictable allocation addresses and guard pages, which
>>   helps in detecting heap based buffer overflows and prevents various
>>   types of attacks.
>> o libc(3) source code has been converted to ANSI C.
>> o realpath(3) is now thread safe.
>> o Several pathname races and potential buffer handling problems have
>> been
>>   fixed in pax(1).
>> o Problems with signal delivery on OpenBSD/sparc and OpenBSD/sparc64
>> have
>>   been fixed.
>> o Reliability of signal handlers using floating point on
>>   OpenBSD/i386 and OpenBSD/macppc has been improved.
>> o NFS write performance has been improved greatly.
>> o Countermeasures against various blind ICMP attacks have been
>> implemented.
>>
>>- Over 3200 ports, 3000 pre-built packages, improved package tools.
>>
>>- As usual, many improvements in manual pages and other documentation.
>>
>>- OpenSSH 4.2:
>> o Adds a new compression method that delays the start of zlib
>>   compression until the user has been authenticated successfully. The
>>   new method ("Compression delayed") is on by default in the server and
>>   eliminates the risk of any zlib vulnerability leading to a compromise
>>   of the server from unauthenticated users.
>> o Added support for the improved arcfour cipher modes from
>>   draft-harris-ssh-arcfour-fixes-02. The improves the cipher's
>>   resistance to a number of attacks by discarding early keystream
>>   output.
>> o Many improvements to connection multiplexing, including a new
>>   opportunistic multiplexing mode, automatic fallback to plain
>>   connections when multiplexing fails and support for multiplexed X11
>>   and agent forwarding.
>> o Many additional bug fixes and improvements, as described in the
>>   release announcement.
>>
>>- This release of OpenBSD includes the following major components from
>> outside suppliers:
>> o X.Org 6.8.2 (+ patches, and i386 contains XFree86 3.3.6 servers (+
>> patches)
>>   for legacy chipsets not supported by X.Org)
>> o Gcc 2.95.3 (+ patches) and 3.3.5 (+ patches)
>> o Perl 5.8.6 (+ patches)
>> o Apache 1.3.29, mod_ssl 2.8.16, DSO support (+ patches)
>> o OpenSSL 0.9.7g (+ patches)
>> o Groff 1.15
>> o Sendmail 8.13.4, with libmilter
>> o Bind 9.3.1 (+ patches)
>> o Lynx 2.8.5rel.2 with HTTPS and IPv6 support (+ patches)
>> o Sudo 1.6.8p9
>> o Ncurses 5.2
>> o Latest KAME IPv6
>> o Heimdal 0.6.3 (+ patches)
>> o Arla 0.35.7
>> o Binutils 2.15 (+ patches)
>> o Gdb 6.3
>>
>>If you'd like to see a list of what has changed between OpenBSD 3.7
>>and 3.8, look at
>>
>>       http://www.OpenBSD.org/plus38.html
>>
>>Even though the list is a summary of the most important changes
>>made to OpenBSD, it still is a very very long list.
>>
>>------------------------------------------------------------------------
>>- SECURITY AND ERRATA --------------------------------------------------
>>
>>We provide patches for known security threats and other important
>>issues discovered after each CD release.  As usual, between the
>>creation of the OpenBSD 3.8 FTP/CD-ROM binaries and the actual 3.8
>>release date, our team found and fixed some new reliability problems
>>(note: most are minor and in subsystems that are not enabled by
>>default).  Our continued research into security means we will find
>>new security problems -- and we always provide patches as soon as
>>possible.  Therefore, we advise regular visits to
>>
>>       http://www.OpenBSD.org/security.html
>>and
>>       http://www.OpenBSD.org/errata.html
>>
>>Security patch announcements are sent to the
>> [EMAIL PROTECTED]
>>mailing list.  For information on OpenBSD mailing lists, please see:
>>
>>       http://www.OpenBSD.org/mail.html
>>
>>------------------------------------------------------------------------
>>- CD-ROM SALES ---------------------------------------------------------
>>
>>OpenBSD 3.8 is also available on CD-ROM.  The 3-CD set costs $45USD
>>(EUR 45) and is available via mail order and from a number of
>>contacts around the world.  The set includes a colorful booklet
>>which carefully explains the installation of OpenBSD.  A new set
>>of cute little stickers is also included (sorry, but our FTP mirror
>>sites do not support STP, the Sticker Transfer Protocol).  As an
>>added bonus, the second CD contains an audio track, a song entitled
>>"Hackers of the Lost RAID".  Lyrics for the song may be found at:
>>
>>   http://www.OpenBSD.org/lyrics.html#38
>>
>>Profits from CD sales are the primary income source for the OpenBSD
>>project -- in essence selling these CD-ROM units ensures that OpenBSD
>>will continue to make another release six months from now.
>>
>>The OpenBSD 3.8 CD-ROMs are bootable on the following five platforms:
>>
>> o i386
>> o amd64
>> o macppc
>> o sparc
>> o sparc64 (UltraSPARC)
>>
>>(Other platforms must boot from floppy, network, or other method).
>>
>>For more information on ordering CD-ROMs, see:
>>
>>       http://www.OpenBSD.org/orders.html
>>
>>The above web page lists a number of places where OpenBSD CD-ROMs
>>can be purchased from.  For our default mail order, go directly to:
>>
>>       https://https.OpenBSD.org/cgi-bin/order
>>
>>or, for European orders:
>>
>>       https://https.OpenBSD.org/cgi-bin/order.eu
>>
>>All of our developers strongly urge you to buy a CD-ROM and support
>>our future efforts.  Additionally, donations to the project are
>>highly appreciated, as described in more detail at:
>>
>>       http://www.OpenBSD.org/goals.html#funding
>>
>>------------------------------------------------------------------------
>>- T-SHIRT SALES --------------------------------------------------------
>>
>>The project continues to expand its funding base by selling t-shirts
>>and polo shirts.  And our users like them too.  We have a variety
>>of shirts available, with the new and old designs, from our web
>>ordering system at:
>>
>>       https://https.OpenBSD.org/cgi-bin/order
>>
>>and for Europe:
>>
>>       https://https.OpenBSD.org/cgi-bin/order.eu
>>
>>The OpenBSD 3.8 t-shirts are available now. The new shirt for 3.8 is
>>an update of the classic wireframe shirt featuring a really cool looking
>>(and nice feeling) wireframe blowfish mascot. We also sell our older
>>shirts, as well as a selection of OpenSSH t-shirts.
>>
>>------------------------------------------------------------------------
>>- FTP INSTALLS ---------------------------------------------------------
>>
>>If you choose not to buy an OpenBSD CD-ROM, OpenBSD can be easily
>>installed via FTP.  Typically you need a single small piece of boot
>>media (e.g., a boot floppy) and then the rest of the files can be
>>installed from a number of locations, including directly off the
>>Internet.  Follow this simple set of instructions to ensure that
>>you find all of the documentation you will need while performing
>>an install via FTP.  With the CD-ROMs, the necessary documentation
>>is easier to find.
>>
>>1) Read either of the following two files for a list of ftp
>>  mirrors which provide OpenBSD, then choose one near you:
>>
>>       http://www.OpenBSD.org/ftp.html
>>       ftp://ftp.OpenBSD.org/pub/OpenBSD/3.8/ftplist
>>
>>  As of November 1, 2005, the following ftp mirror sites have the 3.8
>> release:
>>
>>       ftp://ftp.kd85.com/pub/OpenBSD/3.8/             Austria
>>       ftp://openbsd.informatik.uni-erlangen.de/pub/OpenBSD/3.8/ Germany
>>       ftp://muk.kd85.com/pub/OpenBSD/3.8/             Netherlands
>>       ftp://ftp.stacken.kth.se/pub/OpenBSD/3.8/       Sweden
>>       ftp://ftp2.usa.openbsd.org/pub/OpenBSD/3.8/     New York City, NY,
>> USA
>>       ftp://ftp3.usa.openbsd.org/pub/OpenBSD/3.8/     Boulder, CO, USA
>>       ftp://ftp5.usa.openbsd.org/pub/OpenBSD/3.8/     Redwood City, CA,
>> USA
>>       ftp://rt.fm/pub/OpenBSD/3.8/                    Lake in the Hills,
>> IL,
>>                                                       USA
>>
>>       The release is also available at the master site:
>>
>>       ftp://ftp.openbsd.org/pub/OpenBSD/3.8/  Alberta, Canada
>>
>>       However it is strongly suggested you use a mirror.
>>
>>  Other mirror sites may take a day or two to update.
>>
>>2) Connect to that ftp mirror site and go into the directory
>>  pub/OpenBSD/3.8/ which contains these files and directories.
>>  This is a list of what you will see:
>>
>>       ANNOUNCEMENT   alpha/         mac68k/        sparc/
>>       Changelogs/    amd64/         macppc/        sparc64/
>>       HARDWARE       cats/          mvme68k/       src.tar.gz
>>       PACKAGES       ftplist        mvme88k/       sys.tar.gz
>>       PORTS          hp300/         packages/      tools/
>>       README         hppa/          ports.tar.gz   vax/
>>       SIZES          i386/          root.mail      zaurus/
>>       XF4.tar.gz     luna88k/       sgi/
>>
>>  It is quite likely that you will want at LEAST the following
>>  files which apply to all the architectures OpenBSD supports.
>>
>>       README          - generic README
>>       HARDWARE        - list of hardware we support
>>       PORTS           - description of our "ports" tree
>>       PACKAGES        - description of pre-compiled packages
>>       root.mail       - a copy of root's mail at initial login.
>>                         (This is really worthwhile reading).
>>
>>3) Read the README file.  It is short, and a quick read will make
>>  sure you understand what else you need to fetch.
>>
>>4) Next, go into the directory that applies to your architecture,
>>  for example, i386.  This is a list of what you will see:
>>
>>       CKSUM            bsd.rd           etc38.tgz        misc38.tgz
>>       INSTALL.i386     cd38.iso         floppy38.fs      pxeboot
>>       INSTALL.linux    cdboot           floppyB38.fs     xbase38.tgz
>>       MD5              cdbr             floppyC38.fs     xetc38.tgz
>>       base38.tgz       cdemu38.iso      game38.tgz       xfont38.tgz
>>       bsd              cdrom38.fs       index.txt        xserv38.tgz
>>       bsd.mp           comp38.tgz       man38.tgz        xshare38.tgz
>>
>>  If you are new to OpenBSD, fetch _at least_ the file INSTALL.i386
>>  and the appropriate floppy*.fs or cd38.iso file.  Consult the
>>  INSTALL.i386 file if you don't know which of the floppy images
>>  you need (or simply fetch all of them).
>>
>>5) If you are an expert, follow the instructions in the file called
>>  README; otherwise, use the more complete instructions in the
>>  file called INSTALL.i386.  INSTALL.i386 may tell you that you
>>  need to fetch other files.
>>
>>6) Just in case, take a peek at:
>>
>>       http://www.OpenBSD.org/errata.html
>>
>>  This is the page where we talk about the mistakes we made while
>>  creating the 3.8 release, or the significant bugs we fixed
>>  post-release which we think our users should have fixes for.
>>  Patches and workarounds are clearly described there.
>>
>>Note: If you end up needing to write a raw floppy using Windows,
>>     you can use "fdimage.exe" located in the pub/OpenBSD/3.8/tools
>>     directory to do so.
>>
>>------------------------------------------------------------------------
>>- X.ORG FOR MOST ARCHITECTURES -----------------------------------------
>>
>>X.Org has been integrated more closely into the system.  This release
>>contains X.Org 6.8.2.  Most of our architectures ship with X.Org,
>> including
>>amd64, sparc, sparc64 and macppc.  During installation, you can install
>>X.Org quite easily.  Be sure to try out xdm(1) and see how we have
>>customized it for OpenBSD.
>>
>>On the i386 platform a few older X servers are included from XFree86
>>3.3.6.  These can be used for cards that are not supported by X.Org
>>or where X.Org support is buggy.  Please read the /usr/X11R6/README file
>>for post-installation information.
>>
>>------------------------------------------------------------------------
>>- PORTS TREE -----------------------------------------------------------
>>
>>The OpenBSD ports tree contains automated instructions for building
>>third party software.  The software has been verified to build and
>>run on the various OpenBSD architectures.  The 3.8 ports collection,
>>including many of the distribution files, is included on the 3-CD
>>set.  Please see the PORTS file for more information.
>>
>>Note: some of the most popular ports, e.g., the Apache web server
>>and several X applications, come standard with OpenBSD.  Also, many
>>popular ports have been pre-compiled for those who do not desire
>>to build their own binaries (see BINARY PACKAGES, below).
>>
>>------------------------------------------------------------------------
>>- BINARY PACKAGES WE PROVIDE -------------------------------------------
>>
>>A large number of binary packages is provided.  Please see the PACKAGES
>>file (ftp://ftp.OpenBSD.org/pub/OpenBSD/3.8/PACKAGES) for more details.
>>
>>------------------------------------------------------------------------
>>- SYSTEM SOURCE CODE ---------------------------------------------------
>>
>>The CD-ROMs contain source code for all the subsystems explained
>>above, and the README (ftp://ftp.OpenBSD.org/pub/OpenBSD/3.8/README)
>>file explains how to deal with these source files.  For those who
>>are doing an FTP install, the source code for all four subsystems
>>can be found in the pub/OpenBSD/3.8/ directory:
>>
>>       XF4.tar.gz     ports.tar.gz   src.tar.gz     sys.tar.gz
>>
>>------------------------------------------------------------------------
>>- THANKS ---------------------------------------------------------------
>>
>>OpenBSD 3.8 includes artwork and CD artistic layout by Ty Semaka,
>>who also arranged an audio track on the OpenBSD 3.8 CD set.  Ports
>>tree and package building by Peter Valchev, Nikolay Sturm and
>>Christian Weisgerber.  System builds by Theo de Raadt and Kenji Aoyama.
>>X11 builds by Todd Fries.  ISO-9660 filesystem layout by Theo de Raadt.
>>
>>We would like to thank all of the people who sent in bug reports, bug
>>fixes, donation cheques, and hardware that we use.  We would also like
>>to thank those who pre-ordered the 3.8 CD-ROM or bought our previous
>>CD-ROMs.  Those who did not support us financially have still helped
>>us with our goal of improving the quality of the software.
>>
>>Our developers are:
>>
>>   Aaron Campbell, Aleksander Piotrowski, Alex Feldman, Alexander Guy,
>>   Alexander von Gernler, Alexander Yurchenko, Alexandre Anriot,
>>   Andreas Gunnarsson, Angelos D. Keromytis, Anil Madhavapeddy,
>>   Artur Grabowski, Ben Lindstrom, Bernd Ahlers, Bjorn Sandell,
>>   Bob Beck, Brad Smith, Brandon Creighton, Brian Caswell,
>>   Brian Somers, Bruno Rohee, Camiel Dobbelaar, Can Erkin Acar,
>>   Cedric Berger, Chad Loder, Chris Cappuccio, Christian Weisgerber,
>>   Christopher Pascoe, Claudio Jeker, Constantine Sapuntzakis,
>>   Dale Rahn, Damien Bergamini, Damien Couderc, Damien Miller,
>>   Dan Harnett, Daniel Hartmeier, Darren Tucker, David B Terrell,
>>   David Gwynne, David Krause, David Lebel, David Leonard, Don Stewart,
>>   Dug Song, Eric Jackson, Esben Norby, Federico G. Schwindt,
>>   Fernando Gont, Greg Taleck, Grigoriy Orlov, Hakan Olsson,
>>   Hans Insulander, Hans-Joerg Hoexer, Heikki Korpela, Henning Brauer,
>>   Henric Jungheim, Hiroaki Etoh, Horacio Menezo Ganau, Hugh Graham,
>>   Ian Darwin, Jacob Meuser, Jakob Schlyter, Jan-Uwe Finck,
>>   Jared J. Yanovich, Jason Ish, Jason McIntyre, Jason Peel,
>>   Jason Wright, Jean-Baptiste Marchand, Jean-Francois Brousseau,
>>   Jean-Jacques Bernard-Gundol, Jim Rees, Joel Knight, Jolan Luff,
>>   Jonathan Gray, Jordan Hargrave, Joris Vink, Jose Nazario,
>>   Joshua Stein, Jun-ichiro itojun Hagino, Kenji Aoyama, Kenjiro Cho,
>>   Kenneth R Westerback, Kevin Lo, Kevin Steves, Kjell Wooding,
>>   Kurt Miller, Louis Bertrand, Magnus Holmberg, Marc Balmer,
>>   Marc Espie, Marc Matteo, Marco Peereboom, Marco Pfatschbacher,
>>   Marco S Hyman, Marcus Watts, Margarida Sequeira, Marius Eriksen,
>>   Mark Grimes, Mark Kettenis, Markus Friedl, Martin Reindl,
>>   Mathieu Sauve-Frankel, Mats O Jansson, Matt Behrens, Matt Smart,
>>   Matthew Jacob, Matthieu Herrb, Michael Coulter, Michael Shalayeff,
>>   Michael T. Stolarchuk, Mike Frantzen, Mike Pechkin, Miod Vallat,
>>   Moritz Jodeit, Nathan Binkert, Niall O'Higgins, Nick Holland,
>>   Niels Provos, Niklas Hallqvist, Nikolay Sturm, Nils Nordman,
>>   Oleg Safiullin, Otto Moerbeek, Paul Janzen, Pedro Martelletto,
>>   Peter Galbavy, Peter Stromberg, Peter Valchev, Philipp Buehler,
>>   Reinhard J. Sammer, Reyk Floeter, Rich Cannings, Robert Nagy,
>>   Ryan Thomas McBride, Saad Kadhi, Shell Hin-lik Hung,
>>   Stephen Kirkham, Steve Murphree, Ted Unangst, Theo de Raadt,
>>   Thierry Deval, Thomas Nordin, Thorsten Lockert,
>>   Tobias Weingartner, Todd C. Miller, Todd T. Fries,
>>   Tom Cosgrove, Uwe Stuehler, Vincent Labrecque, Wilbern Cobb,
>>   Wim Vandeputte, Xavier Santolaria.
>>
>>
>>
>>--
>>Huzeyfe ÖNAL
>>---
>>First Turkish Qmail book is out! Go check it.
>>Duydunuz mu! Turkiye'nin ilk Qmail kitabi cikti.
>>http://www.acikakademi.com/catalog/qmail/
>>
>>---------------------------------------------------------------------
>>Cikmak icin, e-mail: [EMAIL PROTECTED]
>>Liste arsivi: http://lists.enderunix.org
>>Turkiye'nin ilk FreeBSD kitabi: http://www.acikakademi.com/freebsd.php
>>
>>
>>
>>
>>
>
>
> ---------------------------------------------------------------------
> Cikmak icin, e-mail: [EMAIL PROTECTED]
> Liste arsivi: http://lists.enderunix.org
> Turkiye'nin ilk FreeBSD kitabi: http://www.acikakademi.com/freebsd.php
>
>
>


---------------------------------------------------------------------
Cikmak icin, e-mail: [EMAIL PROTECTED]
Liste arsivi: http://lists.enderunix.org
Turkiye'nin ilk FreeBSD kitabi: http://www.acikakademi.com/freebsd.php


Cevap