Discuss July 2009

discuss@lists.centos.org

301 participants
277 discussions

Regarding LARGE number of files in a folder in linux
by Bob Hoffman 10 Jul '09

10 Jul '09

This goes out to you admins who manage servers with a heavy load of information. I would like to know what you do about the number of files in a folder, or if that is a concern. I think there is a limitation or a slow down if it gets to big, but what is optimal (if necessary) Example- running a website that allows a user to upload some photos (small ones). You get lets say 300,000 users each uploading 10 photos. That's 3 million files. Storing that in one folder would seem like it would cause an issue when using that folder, is that right? If it does, what do you do about that? How do you handle things? If you have 300,000 clients you could give them their own folder each and then the folders would have only 10 photos, but one folder would contain 300,000 folders. SO what is best for file management and system resources? -Thanks Bob

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LDAP/Autofs instructions are conflicting in Centos5.3
by Eric B. 10 Jul '09

10 Jul '09

Hi, I'm not sure if I am posting this in the right place, so if this belongs more on another list, please let me know. I am trying to get Autofs configured to use LDAP on CentOS5.3, but am running into an inconsitency. On CentOS5.3, the openldap server is installed with an extra schema/redhat/autofs.schema file. From what I can tell, that schema file seems to follow RFC2307bis. In the schema, it uses cn and ou. However, in all docs I can find for RHEL5, everything indicates that I should be using automountMapName and automountKey as the Map attribute and the Entry Attribute. I am very confused. Which is the "right" one to use? If I follow the RHEL docs and tell autofs to use MAP_ATTRIBUTE as automountMapName, then I can't use the schema that is distributed with CentOS5.3. Should I be using the schema that is distributed with the CentOS openLdap package, or is there another one that I should be using instead? Thanks, Eric

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(no subject)
by dani 10 Jul '09

10 Jul '09

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Looking for recommendations for blocking hacking attempts
by Neil Aggarwal 09 Jul '09

09 Jul '09

Hello: I have been looking into projects that will automatically restrict hacking attempts on my servers running CentOS 5. I think the two top contenders are: DenyHosts - http://denyhosts.sourceforge.net Fail2ban - http://www.fail2ban.org >From what I see, DenyHosts only blocks based on failed SSH attempts whereas Fail2ban blocks failed attempts for other access as well. The main benefit I see from DenyHosts is their synchronization service where my servers can proactively block hosts recognized by other users of their service. Does anyone have experience with these tools and have recommendations? Thanks, Neil -- Neil Aggarwal, (281)846-8957, www.JAMMConsulting.com Will your e-commerce site go offline if you have a DB server failure, fiber cut, flood, fire, or other disaster? If so, ask me about our geographically redudant database system.

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yum-3.2.8 for Centos 4 backport, part II.
by David Hrbáč 09 Jul '09

09 Jul '09

Hi, I have again worked on yum 3.2.8 for Centos 4 today, after a long time. The result is backported package yum-3.2.8-9.el4.hrb.2.1.5 which is the upgrade of yum-3.2.8-9.el4.hrb.2.1.3 I've been using smoothly for quite a long time. Packages are in testing repos: http://fs12.vsb.cz/hrb33/el4/hrb/testing/i386/repodata/ http://fs12.vsb.cz/hrb33/el4/hrb/testing/x86_64/repodata/ I'd like to ask for QA tests. This patched version passes all the internal yum tests (aka 'make test'). Regards, David Hrbáč

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OT:CMS
by madunix 09 Jul '09

09 Jul '09

Dear ALL, What are the experiences you have with various open source CMS products (Comparison of PHP-based CMS) such as (Drupal, Joomla, OpenCMS, Typo3, eZ publish ..etc.) Security, Bugs, Performance, Support, Developer Community, learning curve, appearance..etc Thanks -mu

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Add instantly active local user accounts *with* password using useradd -p option ?
by Niki Kovacs 09 Jul '09

09 Jul '09

Hi, I need to setup a load of user accounts on a series of machines, for testing purposes. I'm using a script to do this, but the only problem I have so far: I have to activate them all manually by doing passwd user1, passwd user2, passwd user3, etcetera. The useradd man page mentions a -p option to define a password, but I can't seem to get this to work. Here's what I'd like to be able to do: # useradd -c "Gaston Lagaffe" -p abc123 -m glagaffe And put that line in a script, so the account is *instantly* activated. I tried it, but to no avail. Looks like there's some burning loop I have to jump through first :o) No security considerations here for the moment, since it's for testing. Any idea how this works? Niki

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ldap authentication
by hqm8512 09 Jul '09

09 Jul '09

hello , we're using LDAP for user authentication I'm looking for a mechanism to automatically create a users home directory when he logs in for the first time Thanks, -- Best Regards

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Re: [CentOS] dhcp question
by chloe K 09 Jul '09

09 Jul '09

can i know how to set up dns cache server? do you have any useful website? thank you --- On Wed, 7/8/09, John R Pierce <pierce(a)hogranch.com> wrote: From: John R Pierce <pierce(a)hogranch.com> Subject: Re: [CentOS] dhcp question To: "CentOS mailing list" <centos(a)centos.org> Received: Wednesday, July 8, 2009, 1:08 PM chloe K wrote: > thank you > > how can I put the name server in dhcpd.conf for the client as I use > ISP nameserver? > this name server has to change when I change other ISP too > > run your own local DNS caching server, and give the DHCP clients 192.168.0.1 or whatever your local network gateway IP is. _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos __________________________________________________________________ Be smarter than spam. See how smart SpamGuard is at giving junk email the boot with the All-new Yahoo! Mail. Click on Options in Mail and switch to New Mail today or register for free at http://mail.yahoo.ca

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Window Server 2003 will not run as paravirtualized?
by Neil Aggarwal 08 Jul '09

08 Jul '09

Hello: According to the Red Hat Virtualization Guide, Windows Server 2003 32-bit will only run as a fully virtualized guest on an AMD64 system. I thought I have seen a lot of discussion about running paravirtualized Windows on CentOS. Is that a bad idea? Neil -- Neil Aggarwal, (281)846-8957, www.JAMMConsulting.com Will your e-commerce site go offline if you have a DB server failure, fiber cut, flood, or other disaster? If so, ask me about our geographically redudant database system.

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Discuss July 2009