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iptables for PostgreSQL not working
by Carlos S 01 Sep '10

01 Sep '10

Hi, I am having problem in configuring iptables for PostgreSQL server. I added following rule to iptables to allow connections to default PostgreSQL port (5432): {{{ sudo /sbin/iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp -s 10.0.0.0/24 --dport 5432 -j ACCEPT }}} After this I can't connect using telnet or psql (postgres client). Following error is received from telnet on MacOS and CentOS: {{{ MacOS$ telnet 10.0.0.12 5432 Trying 10.0.0.12… telnet: connect to address 10.0.0.12: Connection refused telnet: Unable to connect to remote host }}} {{{ CentOS$ telnet 10.0.0.12 5432 Trying 10.0.0.12... telnet: connect to address 10.0.0.12: No route to host }}} I tried removing source address constraint and to allow connections from all hosts, however that didn't make any difference. * The connection works fine when I stop iptables firewall. I am sure there is no rule before this 5432 rule which is refusing connections. The PostgreSQL server is running and accepting localhost connections. Also, hosts.allow and hosts.deny file are not refusing connections. Any help on what might be wrong? -- Thanks, CS

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Centos 5.5, not booting latest kernel but older one instead
by fred smith 31 Aug '10

31 Aug '10

I've been going along not noticing things happening right under my nose. so imagine my surprise when I discovered last night that my Centos 5 box has installed multiple new kernels over the last few months, as updates come out, and IT IS NOT BOOTING THE NEWST ONE. grub.conf says to boot kernel 0, and 0 is the newest one. but the one it actually boots is 6 or 8 down the list (clearly I've not been keeping things cleaned up, either). Below is some info that shows the problem. Can anyone here provide helpful suggestions on (1) why it is doing this, and more importantly (2) how I can make it stop? Thanks! uname reports: 2.6.18-164.15.1.el5PAE #1 SMP Wed Mar 17 12:14:29 EDT 2010 i686 athlon i386 GNU/Linux while /etc/grub.conf contains: # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00 # initrd /initrd-version.img #boot=/dev/md0 default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.18-194.11.1.el5PAE) root (hd0,0) kernel /vmlinuz-2.6.18-194.11.1.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-194.11.1.el5PAE.img title CentOS (2.6.18-194.11.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-194.11.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-194.11.1.el5.img title CentOS (2.6.18-194.8.1.el5PAE) root (hd0,0) kernel /vmlinuz-2.6.18-194.8.1.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-194.8.1.el5PAE.img title CentOS (2.6.18-194.8.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-194.8.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-194.8.1.el5.img title CentOS (2.6.18-194.3.1.el5PAE) root (hd0,0) kernel /vmlinuz-2.6.18-194.3.1.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-194.3.1.el5PAE.img title CentOS (2.6.18-194.3.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-194.3.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-194.3.1.el5.img title CentOS (2.6.18-164.15.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-164.15.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-164.15.1.el5.img title CentOS (2.6.18-164.15.1.el5PAE) root (hd0,0) kernel /vmlinuz-2.6.18-164.15.1.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-164.15.1.el5PAE.img title CentOS (2.6.18-164.11.1.el5PAE) root (hd0,0) kernel /vmlinuz-2.6.18-164.11.1.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-164.11.1.el5PAE.img title CentOS (2.6.18-164.11.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M initrd /initrd-2.6.18-164.11.1.el5.img -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- I can do all things through Christ who strengthens me. ------------------------------ Philippians 4:13 -------------------------------

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GFS/GFS2 on CentOS
by Boris Epstein 31 Aug '10

31 Aug '10

Hi all, If you have had experience hosting GFS/GFS2 on CentOS machines could you share you general impression on it? Was it realiable? Fast? Any issues or concerns? Also, how feasible is it to start it on just one machine and then grow it out if necessary? Thanks. Boris.

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Re: [CentOS] [CentOS-announce] CESA-2010:0659 Moderate CentOS 5 i386 httpd Update
by Gilbert Sebenste 31 Aug '10

31 Aug '10

On Tue, 31 Aug 2010, Tru Huynh wrote: > CentOS Errata and Security Advisory 2010:0659 Moderate > > Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0659.html Hi Tru, Thank you so much for doing these updates, I really appreciate them! How is Karanbir doing? I hope he gets back in the saddle soon so that you don't have to do all the work for all 3 versions. :-) Again, thanks to you and Karanbir and the entire CentOS team again for all your hard work!!! Gilbert ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** *******************************************************************************

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korganizer missing alarms
by ken 31 Aug '10

31 Aug '10

Korganizer has been working fine for years for me. But just recently it's started missing alarms... I mean I set an alarm for an event but the window for it is never popped. I googled around and found that other were having this problem back in 2007 and 2005, but there's no mention of it in recent months. Anyone else experiencing this or know what the source of the problem is? tnx -- Find research and analysis on US healthcare, health insurance, and health policy at: <http://healthpolicydaily.blogspot.com/>

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problem about editing keypad
by kongfanping 31 Aug '10

31 Aug '10

Hi, guys The keypad, i.e. the arrow keys, page up, page down, home, end and so on, does not work, which is very annoying. My system is CentOS 5.5. Is there any one who can help? Thank you very much! regards, fanping

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e2fsck with millions of files
by Sean Carolan 31 Aug '10

31 Aug '10

I have a large (1.5TB) partition with millions of files on it. e2fsck has been running nearly 12 hours and is still on "Checking directory structure". Any tips for speeding this along?

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Re: [CentOS] e2fsck with millions of files
by Sean Carolan 31 Aug '10

31 Aug '10

On Tue, Aug 31, 2010 at 8:49 AM, Brent L. Bates <blbates(a)vigyan.com> wrote: > Use the XFS file system and never have to worry about fsck again. You'll > have a fast, more reliable, and more robust file system with over a decade and > exabytes of use under its belt that you will never have to wait for fsck > again. When this server gets rebuilt this is probably the path we will take. Thanks for the tip.

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Re: [CentOS] System beeps in kernel 2.6.18-194
by Glenn Eychaner 31 Aug '10

31 Aug '10

On Aug 26, 2010, at 12:00 PM, centos-request(a)centos.org wrote: >> ?Is there someplace can I find *detailed* release notes on the differences between -164 and -194 kernels to help in looking for the problem, pinning it down, and submitting a patch (and/or building my own kernel), or should I just download the SRPMS and dig in? > > You can find kernel changelog diffs here (maintaind by Alan Bartlett): > > http://www.centos.toracat.org/ajb/kernel-clog-diff/ Is there any place that I can find RPM or SRPM packages for the kernels between 18-164 and 18-194 that are listed in this kernel log? It would really help narrow down the problem if I could just build each kernel version and test it; then at least I'd only have one set of differences to go through rather than 30. [Not a kernel expert, but willing to give it a solid go!] Thanks, -G. -- Glenn Eychaner (geychaner(a)lco.cl) Telescope Systems Programmer, Las Campanas Observatory

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Re: [CentOS] too many open files
by Jerry Geis 31 Aug '10

31 Aug '10

lists-centos wrote: > Is this a dedicated machine, or some type of virtual hosted > environment? > > I got this error in a (centos 4.x) virtual hosted environment > recently when I exceeded my allowed process count (I was well below > my open files limit). > > > - Richard > > > ------------ Original Message ------------ > >> Date: Thursday, August 19, 2010 01:44:47 PM -0400 >> From: Jerry Geis <geisj(a)pagestation.com> >> To: CentOS ML <centos(a)centos.org> >> Subject: [CentOS] too many open files >> >> I am getting an error about to many open files. >> I tried to "echo 500000 > /proc/sys/fs/file-max" >> The number is there now, but I continue to get the error. >> >> Is there something else to do? >> >> Jerry >> _______________________________________________ >> CentOS mailing list >> CentOS(a)centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > > ------------ End Original Message ------------ > > > > seems like there is a global value (which I did above) and a process limit ulimit -a tells all limits and ulimit -n 2048 seemed to work for me. Although I had to kill hte process and restart it. Thanks, jerry

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