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Running SELinux necessary for the average user?
by Preston Crawford 03 May '07

03 May '07

I'm wondering because it seems to be slowing my machine down considerably under CentOS 5. Especially the daemon they include to monitor SELinux and the program that attaches to it. I tried opening this earlier and it just sat there spinning. I want the knowledge that my machine is secure and safe. But I'm wondering if the price is worth it. Is it necessary for my machine to be fairly secure? Preston

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Re: [CentOS] Running SELinux necessary for the average user?
by Les Bell 03 May '07

03 May '07

"Preston Crawford" <me(a)prestoncrawford.com> wrote: >> Is it necessary for my machine to be fairly secure? << No, as long as you take all the usual precautions: * Removing - or at least not running - unnecessary services * Keeping the system patched up-to-date (easy with yum, etc.) * Choosing strong passwords - or not using passwords for login across the Internet at all; generate an OpenSSH RSA 1024-bit key and use that instead * Never use protocols that transmit passwords in plaintext across the Internet (telnet, POP/IMAP without SSL, etc.) * Never logging in as root, but only using su to become root when necessary, for as short a time as necessary * Adding some firewall rules to (e.g.) rate-limit SSH connections to block brute-force password-guessing attacks * Use Postfix rather than Sendmail (though Sendmail has stood the test of time. by now) These are the major "good practices" required, though some people will doubtless suggest others (and probably quibble with some of the above ;) ). There have been Linux servers and workstations sitting on the Internet for many years without SELinux support, demonstrating it's not necessary. SELinux is a Thing of Beauty and a Joy Forever; I've used it myself for specialised situations, but people can - and do - run securely for years without it. Best, --- Les Bell, RHCE, CISSP [http://www.lesbell.com.au] Tel: +61 2 9451 1144 FreeWorldDialup: 800909

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Fwd: [CentOS] Installed CentOS 5 today, question about an error I'm getting
by Bart Schaefer 02 May '07

02 May '07

Apparently some of Gmail's SMTP servers are on the multihop DNSBL. ---------- Forwarded message ---------- From: Bart Schaefer <barton.schaefer(a)gmail.com> Date: May 2, 2007 8:04 PM Subject: Re: [CentOS] Installed CentOS 5 today, question about an error I'm getting To: CentOS mailing list <centos(a)centos.org> On 5/1/07, John Summerfield <debian(a)herakles.homelinux.org> wrote: > Preston Crawford wrote: > > > > So I did a fresh install today. Decided to go ahead and upgrade. > > Everything seems okay save for three problems. > > > > #1 - I get a message during boot saying that an Intel microcode update > > didn't work. Something about not being able to find /proc/microcode. > > What's your CPU? If it's not Intel, it's probably irrelevant. I'm having this same error, using the Xen kernel on a Sony VAIO desktop. processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 0 model name : Intel(R) Pentium(R) 4 CPU 1500MHz The error is coming from /etc/rc.d/init.d/microcode_ctl but you can reproduce it by running "/sbin/modprobe microcode" from the shell.

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Centos %.0 failed to recognize my video card
by Richard E Miles 02 May '07

02 May '07

I tried to install Centos 5.0 yesterday and it was a complete failure. The installer could not detect my vidio card. The vidio card is a nvidia geforce fx GeForce FX (generic). This is the same vidio card that was perfectly recognized in Centos 4.3 The anaconda installer repartitioned my disk and installed a custom selection of software. This took about 1 hr. When I rebooted it would no start x windows. I even took a file copy of the Centos 4.3 xorg.conf and put it in /etc/X11 directory. I tried system-config-display reconfig and it failed to recognize the vidio. I reinstalled Centos 4.3. I have had the same problem when I was trying to install fedora core 5. I am convinced the redhat people removed the monitor selection for a viewsonic VP171b. This is why it must have happened. I had reported this problem when I was on the fedora core system. But Redhat did not do anything to correct the problem. I am stuck at Centos 4.3 forever. I am so frustrated I even tried Ubuntu but that would not recognize my usb 1.0 mouse. I am waiting to amass the cash necessary to buy an apple Imac. At least with there systems everything just works without problems. -- Richard Miles Federal Way WA. USA registered Linux user 46097

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additional window managers
by Nancy Rudins 02 May '07

02 May '07

Hi, How can I put an additional window manager in the login screen? I've installed fluxbox and I'd like to be able to log in with it. Thanks much in advance. Kind regards, Nancy Nancy Rudins nrudins(a)ncsa.uiuc.edu http://www.ncsa.uiuc.edu/~nrudins/ Take a sad song and make it better. (lennon/mccartney)

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Mouting Xen DomU images in Dom0
by Devraj Mukherjee 02 May '07

02 May '07

Hi everyone, I have a CentOS 5 Domain0 with a CentOS 5 Domain U installed on my machine, it all works flawlessly. One of the problems I am faced with is transporting the Domain U image to another machine (not in real time). Since the Virtual Machine Manager allows installing the guest operating system using the CentOS 5 installer, it ends up treating the partition (in my case an LVM partition) as a physical disk. To backup my Xen image is xm save the best way of doing it? Or can I infact mount the partitions created by the Domain U in Domain 0 and tar.gz them. Any feedback is welcome. -- "I never look back darling, it distracts from the now", Edna Mode (The Incredibles)

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PearDB, PHP, CentOS 5
by Lonny Selinger 02 May '07

02 May '07

All, I'm trying to get a small app working but it requires DB.php provided by Pear. I've double checked and I have php-pear.noarch installed but there is no DB.php (just DependencyDB.php ). There seem to be no other packages that have pear or a DB.php file. Anyone have any ideas where I can get it? I've found just the files provided from the Pear site but I have no idea where to copy them to so everything is noticed properly. Suggestions/Solutions? Thanks!! Lonny

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Install hung 51%
by Robert Moskowitz 02 May '07

02 May '07

The Centos 5 install on my notebook stopped at 51% complete on downloading packages. Is there anyway to restart where it hung? Say boot into linux resumeinstall ? :) ARGH!!!

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ACPI: unable to locate ASPD
by Orlando Mederos 02 May '07

02 May '07

Hy This error apear in the booting Centos 4.4 , ASPI: unable to locate ASPD I need a solution for this problem, My server is an Altos 9100 (Dual PII a 400Mhz , with 256MB of Ram and scsi controller aic7800) Bye Orlando Este Mensaje se encuentra libre de Virus, Chequeado por MDaemon AntiVirus: AVirus: v2.2.7 Fuente del motor de AV: Alt-N Technologies, Ltd (excellent) Versi�n del motor de AV: 4.0.1.14 Servidor de Correo "Hotel Tuxpan".Varadero.Cuba

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Rebuild all currently installed RPMs?
by Justin Cataldo 02 May '07

02 May '07

Hi there, Does anyone know a quick way in yum or rpm to reinstall all currently installed rpm's - ie: Some files have been deleted but you don't know which ones.. So you just want to force a reinstall of all currently installed. I have been using: Rpm -Va | grep missing >> missing.log And then more missing.log Rpm -q -whatprovides /path/to/file And then Rpm -Uvh --force ftp://mirror/path/file But it's a slow and painful process. It's on a CentOS 4.4 machine. JC

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