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Re: [CentOS] Memory Usage in Top and System Monitor
by Michael McNulty 21 Jul '11

21 Jul '11

Thanks for the replies. I checked free and that makes sense to me now. The only thing I cannot figure out is, if there is all this memory available why would swap space start building? I started checking all this out because the system slowed to a crawl after I noticed swap space being used which does not make sense to me if there is available memory. total used free shared buffers cached Mem: 8301448 7917100 384348 0 59984 6009248 -/+ buffers/cache: 1847868 6453580 Swap: 4128760 1225896 2902864 btw - this is Centos 5.6 box using the PAE kernel. 2.6.18-238.12.1.el5PAE

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Memory Usage in Top and System Monitor
by Michael McNulty 20 Jul '11

20 Jul '11

Can someone help clear up some confusion in reading memory usage in Top and System monitor. Here is a picture of both. http://s1176.photobucket.com/albums/x327/ionosphere2011/ Why does "System Monitor" show 1.7gb free out of 8gb. While Top shows all 8gb being used? If 1.7gb is free then it should not be using swap space so I assume "System Monitor" is reporting it incorrectly? Thanks -- Mike

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Refurbished Dell Servers (fwd)
by Keith Roberts 20 Jul '11

20 Jul '11

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Script to sync with repo
by Jerry Geis 20 Jul '11

20 Jul '11

under 5.6 I have a script that runs every night to rsync the repodata for local installations. I added the 6.0 to do the same. Something seems wrong now for 6.0. I do the same thing and I get errors from my local repo at install time. Seems like the cyrus-sasl package is never happy and aborts the installation. Is something wrong with the script below? It seems like it successfully copies the files. I ran it manually and did not see any errors. Any thoughts? Thanks, Jerry # The kickstart files point to the "repo" # # This file will creat the directories and copy the files # for VERSION in "5.6" "6.0" do mkdir -p /var/www/html/centos/$VERSION/updates/x86_64/RPMS mkdir -p /var/www/html/centos/$VERSION/updates/x86_64/repodata rsync -av rsync://mirrors.kernel.org/mirrors/centos/$VERSION/updates/x86_64/RPMS/* /var/www/html/centos/$VERSION/updates/x86_64/RPMS rsync -av rsync://mirrors.kernel.org/mirrors/centos/$VERSION/updates/x86_64/repodata/* /var/www/html/centos/$VERSION/updates/x86_64/repodata done ~

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firewall?
by hadi motamedi 20 Jul '11

20 Jul '11

Dear All I need to put my centos 5.6 server as firewall server in fron of a windows-running node before connecting it to the net. Can you please let me know what stuff do I need to put on my centos server? Thank you

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CentOS mailing list, Free Pearl Set
by dr.virus.india＠gmail.com 20 Jul '11

20 Jul '11

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CentOS 6 - VM network bridge issue
by Emmett Culley 20 Jul '11

20 Jul '11

I built a CentOS 6 machine to host several CentOS 6 guest servers. As all guests will be Internet facing I set up the host with two bridged NICs and assigned an Internet facing IP address to br0 and a local IP address to br1. Each guest was installed using br0 and br1 with virtio drivers. On each I assigned an Internet facing IP address to eth0 and a local IP address on eth1. So far so good. I can access the guest servers from either IP address as expected. That is HTTP, SSH and SMTP servers on them are accessible and do what they are supposed to do. Except... Except from any location outside of my Comcast Cable Modem. To be clear, from any machine inside the modem to any address on the guests, all works perfectly. But outside the modem the guest apps either don't receive packets or for some reason don't respond, and I've tired it from four different locations. Using Wireshark on the guests I can see the packets arrive from the outside sources, but no response is seen. On accesses from inside I can see both incoming and outgoing packets, as expected. I can ping the outside sources from the guests, yet pings from the outside sources get no response from the guests. All the outside sources get responses when pinging the host. I can ping the guests from any inside machine. I've tried it with and without firewalls, both on the guests and the host. Including with the following iptables rule: iptables -A FORWARD -m physdev --physdev-is-bridged -j ACCEPT and the following sysctl adjustments: net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 Both of the guest servers I've built have have same issue. Any ideas? I am at loss as to how to proceed and am about to reconsider the idea of multiple guests as servers. All packages are from the CentOS repo and I am using kvm-qemu via libvirtd and virt-manager. Emmett

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[OT] Apache oddity - appending garbage request does not result in a 404
by Ray Leventhal 20 Jul '11

20 Jul '11

HI, I know this is OT and I apologize in advance, but with the wealth of knowledge on this list I hope that some kind soul will help (off list is fine). I run CentOS 5.6 with the usual LAMP stack. One of the virtual sites on this server failed a PCI Compliance (credit card security stuff) because, of all things, a URL with a non-existent request after the .php doesn't return a 404 and I can't figure out why. Example: http://www.domain.com/pagedoesnotexist returns the expected 404 But browse to a page that does exist, like goodpage.php, then append either a slash and some random string, or a ?=somerandomstring and the goodpage.php is still displayed. I'll gladly provide more info, if needed. Any pointers on where to look would be truly appreciated. Thanks in advance, and my apologies for the noise. -Ray

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Recommended mailing list manager for CentOS 5.6
by John J. Boyer 20 Jul '11

20 Jul '11

Does CentOS 5.6 have a mailing list manager like ecartis or majordomo? I want to set up mailing lists for my server in the cloud for three domains that I own. What mailing list managers do yourecommend, and where can they be found? I don't ming compiling source code. Thanks, -- John J. Boyer; President, Chief Software Developer Abilitiessoft, Inc. http://www.abilitiessoft.com Madison, Wisconsin USA Developing software for people with disabilities

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svn check out failed for 'connection refused' reason
by Steve liu 20 Jul '11

20 Jul '11

Hi just want to check out soft by svn, but failed for 'connection refused' reason e.g. svn co svn://svn.mplayerhq.hu/mplayer/trunk mplayer svn: Can't connect to host 'svn.mplayerhq.hu': Connection refused and this is my iptables status and some info to confirm the DNS and ICMP connection are ok. ========================= service iptables status iptables: Firewall is not running. ping svn.mplayerhq.hu PING svn.mplayerhq.hu (192.190.173.45) 56(84) bytes of data. 64 bytes from avserver.banki.hu (192.190.173.45): icmp_seq=1 ttl=49 time=200 ms ========================= so, anyone knows the reason? my system is centos 6 with 64bit thanks

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