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CentOS on HP EliteBook 6930 or Dell Latitude e6400
by Kurt Hansen 23 Nov '08

23 Nov '08

Hello, I'm considering the HP EliteBook 6930 or the Dell Latitude e6400 notebooks for CentOS. I'm planning on using these in a situation in which they are always on, and I want low power and low noise and high reliability. HP claims up to 24 hours battery power and Dell up to 19 hours. I figure this can bridge the gap for most power outages in my neighborhood. I realize that I won't get these hours running CentOS, but these two seem best of breed, so they give me the most margin. I'm also planning on getting a SSD (Solid State Drive) on them. I've found folks on the Web who've put the latest Ubuntu on each with few problems, but very little mention of other distributions. Actually, I couldn't find any mention of other distributions. Is there anything that should concern me about putting CentOS on either of these? Has anyone done it? Note that I plan to turn wireless networking off so I'd be happy if it doesn't work. Also, I don't care about the screen performance. I figure these are the two most likely areas of compatibility concern, but the SSD has me a little concerned, too. Thanks for your help! Take care, Kurt Hansen

2 1

Cluster fail over database getting stopped
by linux-crazy 23 Nov '08

23 Nov '08

Hi, I am running RHEL3u8 two node cluster,which is running oracle 9i database.I am facing problem while rebooting second node causing my oracle database get stopped in the active node 1 which is running my database.so i checked below probabilities to find out when the database get stopped. Version clumanager-1.2.31-1.x86_64.rpm I stopped both the node. started first node when the clumanager started during boot cycle on node 2 database running on node 1 get stopped(checked my oracle alert log telling the database get stopped exactly at the same time clumanager started on node 2) After that When i run clustat on node 1 its telling the service(database) is running. I am using /etc/init.d/scriptdb.sh in my cluster config file which is having both start.stop and status check. test 2: I stopped both the node and started the node 2 first and waited for 30 minutes. oracle was up and running by default on node 2 (clumanger started oracle service) started node 1 after 20 minutes when the clumanager started during boot cycle on node 1 database running on node 2 get stopped(checked my oracle alert log telling the database get stopped exactly at the same time clumanager started on node 1) After that When i run clustat on node 2 its telling the service(database) is running. Test2: If cluster relocate the service automatically by itself form node 1 to node 2 or node 2 to node 1 for some reason during the critical day time my database is not getting up during fail over on both the nodes. Test 3: If i manually relocate the service from node 1 to node 2 and vice versa my database is not getting stopped and it is working fine. Please some one help me to fix out this issue ,it is my critical production database. Below is my cluster config file cluster.xml <?xml version="1.0"?> <cluconfig version="3.0"> <clumembd broadcast="yes" interval="1000000" loglevel="5" multicast="no" multicast_ipaddress="" thread="yes" tko_count="25"/> <cluquorumd loglevel="7" pinginterval="5" tiebreaker_ip=""/> <clurmtabd loglevel="7" pollinterval="4"/> <clusvcmgrd loglevel="7"/> <clulockd loglevel="7"/> <cluster config_viewnumber="4" key="6672bc0a71be2ec9486f6a2f5846c172" name="DBCLUSTER"/> <sharedstate driver="libsharedraw.so" rawprimary="/dev/raw/raw1" rawshadow="/dev/raw/raw2" type="raw"/> <members> <member id="0" name="cluster1" watchdog="yes"/> <member id="1" name="cluster2" watchdog="yes"/> </members> <services> <service checkinterval="10" failoverdomain="oracle_db" id="0" maxfalsestarts="0" maxrestarts="0" name="database" userscript="/etc/init.d/script_db.sh"> <service_ipaddresses> <service_ipaddress broadcast="None" id="0" ipaddress="20.2.135.35" monitor_link="1" netmask="255.255.0.0"/> </service_ipaddresses> <device id="0" name="/dev/cciss/c0d0p1" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol1" options="rw"/> </device> <device id="1" name="/dev/cciss/c0d0p2" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol2" options="rw"/> </device> <device id="2" name="/dev/cciss/c0d0p5" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol3" options="rw"/> </device> <device id="3" name="/dev/cciss/c0d0p6" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol4" options="rw"/> </device> <device id="4" name="/dev/cciss/c0d0p7" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol5" options="rw"/> </device> <device id="5" name="/dev/cciss/c0d0p8" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol6" options="rw"/> </device> <device id="6" name="/dev/cciss/c0d0p9" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol7" options="rw"/> </device> <device id="7" name="/dev/cciss/c0d0p10" sharename=""> <mount forceunmount="yes" fstype="ext3" mountpoint="/vol8" options="rw"/> </device> </service> </services> <failoverdomains> <failoverdomain id="0" name="oracle_db" ordered="no" restricted="yes"> <failoverdomainnode id="0" name="cluster1"/> <failoverdomainnode id="1" name="cluster2"/> </failoverdomain> </failoverdomains> </cluconfig> Regards, crazy pap

2 1

syslog remote computers
by Craig White 22 Nov '08

22 Nov '08

Trying to figure out if there's a way to get syslog.conf to direct remote logging from a wireless access point to log to a separate file instead of the main syslog and can't figure out how that could be done from man syslog.conf (or man 2/3 of syslog) this clearly doesn't work 192.168.1.251.* /var/log/WAP-2.log which according to the man page, makes sense since this the IP address is not a facility. Is there a way to do this that I am missing? Craig

6 9

kbs-CentOS-Testing gnucash: status for CentOS 5?
by William L. Maltby 22 Nov '08

22 Nov '08

I decided I would like to try GnuCash on my 5.x desktop system. I did an available list and got this gnucash.i386 2.2.4-1.el5.kb kbs-CentOS-Testi gnucash-docs.noarch 2.2.0-2.el5.kb kbs-CentOS-Testi Did a yum --enablerepo=kbs-CentOS-Testing install gnucash\* That produced Package gnucash-docs-2.2.0-2.el5.kb.noarch.rpm is not signed I figured I had forgot to install the gpg key, so I did that. Well, now I have to instances of that key. When I try to remove one copy, # rpm -e gpg-pubkey-3e13cf5b-422eea1c error: "gpg-pubkey-3e13cf5b-422eea1c" specifies multiple packages I tried removing the /var/lib/rpm/__* and rebuild, but no help. Still have two instances of the key. Any way to clean that without a remove and reinstall of all the keys? Anyway, a search of the archives has an entry indicating that gnucash was available for CentOS 4.x, but nada about 5. Am I too early on this? Anyhoo, figuring that docs could be addressed later, I then foolishly (need more coffee?) did yum --enablerepo=kbs-CentOS-Testing install --exclude=gnucash-docs \ gnucash which, of course produced Error: Missing Dependency: gnucash-docs >= 2.2.0 is needed by package gnucash-2.2.4-1.el5.kb.i386 (kbs-CentOS-Testing) Undaunted, I figured to download via yum and force installation with nodeps (hmm, yum --downloadonly didn't work. Nothing in the docs about that though. Did yumdownloader --enablerepo=kbs-CentOS-Testing gnucash-docs and that worked) Then rpm --install --nodeps gnucash-docs-2.2.0-2.el5.kb.noarch.rpm worked, but gave I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd The docs were installed though AFAICT. ISTR seeing stuff similar to this with other packages in the dim past. Don't recall any solutions though. I wonder if there's a way to suppress that activity. I don't particularly care for packages that require on-line references for local and potentially sensitive work. I'm thinking there might be a configuration file I could modify because I see some similar files already on the system. I'll pursue that later if I get gnucash installed. Back to the primary task, did yum --enablerepo=kbs-CentOS-Testing install gnucash That produced Package gwenhywfar-2.6.2-2.el5.kb.i386.rpm is not signed At that point I felt maybe I was a bit premature as I had already confirmed that I had the gpg key installed. Any words of wisdom for me? If I don't need to worry about the signing issues, I guess I could download and install all with --nodeps. Good/bad idea? Anything I might do to help the process along? I've not done any rpm work, so it might take awhile if there is anything too technical. I'm going to fire up my 4.x and see if it works there. I can muddle through there, with a small amount of inconvenience. But that might be worth it. Before I forget, thanks to you and all the crew for the hard work that benefits us all. TIA -- Bill

2 2

rsyslog-postgresql for CentOS5
by Adam Tauno Williams 22 Nov '08

22 Nov '08

Is the postgreSQL backend/connector for rsyslog being packaged by anyone? I've looked around and only found rsyslog & rsyslog-mysql.

1 0

howto transfer all configuration between 2 remote dedicated servers?
by Joe Barjo 22 Nov '08

22 Nov '08

Hello I'm willing to change my dedicated server hosting provider, and transfer my existing server to the new one. I don't have kvm access, but both servers are centos5.2 I can boot a network image that is debian based and have access to the disk. Then I tried to rsync -a my first server to the destination host, but it was not reachable from the network (I modified /etc/fstab and /etc/sysconfig/network-scripts/ifcfg-eth0 for the destination server). I also copied /boot including grub configuration... (both are using grub) As I don't have a kvm, I don't know why it is not reachable from net. So I would like to get the list of all rpms (rpm -qa) install them to the new server, then copy all files that were added/modifed Most packages should be still in the yum cache, but I'm not sure. For the rpm -qa I think there should be some special flags to get an output that would be yum compatible? But my real question is: How can I get a list of files in the whole filesystem that were added or modified compared to all the files that come from rpms? Is there a script for doing such a thing? Thanks

6 6

Forward all traffic from public IP A to public IP B?
by Morten Sundstrøm 22 Nov '08

22 Nov '08

Need help. Im trying to forward all traffic to a public server(A) to another public server(B) except traffic to port 22. Found this on google but cant get it to work. Could someone help me please. Server A has one NIC server B has one NIC. Do i need 2 NICS in server A. #!/bin/sh iptables -F iptables -F INPUT iptables -F OUTPUT iptables -F FORWARD iptables -X iptables -F -t nat iptables -P INPUT ACCEPT iptables -P OUTPUT ACCEPT iptables -P FORWARD ACCEPT echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A PREROUTING -i eth0 --protocol tcp --destination-port ! 22 -j DNAT --to-destination "IP B" iptables -t nat -A PREROUTING -i eth0 --protocol udp -j DNAT --to-destination "IP B" # END /etc/rc.d/init.d/iptables status Table: filter Chain INPUT (policy ACCEPT) num target prot opt source destination Chain FORWARD (policy ACCEPT) num target prot opt source destination Chain OUTPUT (policy ACCEPT) num target prot opt source destination Table: mangle Chain PREROUTING (policy ACCEPT) num target prot opt source destination Chain INPUT (policy ACCEPT) num target prot opt source destination Chain FORWARD (policy ACCEPT) num target prot opt source destination Chain OUTPUT (policy ACCEPT) num target prot opt source destination Chain POSTROUTING (policy ACCEPT) num target prot opt source destination Table: nat Chain PREROUTING (policy ACCEPT) num target prot opt source destination 1 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:!22 to:"IP B" 2 DNAT udp -- 0.0.0.0/0 0.0.0.0/0 to:"IP B" Chain POSTROUTING (policy ACCEPT) num target prot opt source destination Chain OUTPUT (policy ACCEPT) num target prot opt source destination /Morten.

5 8

finding a needed Aramaic font
by Michael A. Peters 22 Nov '08

22 Nov '08

Not CentOS specific, but ... I'm trying to load a web page with some ancient Aramaic text. I have some Aramaic fonts installed, but I think they are for modern Aramaic. I've tried installing several different ttf fonts, but I still get boxes with numbers in them - IE 07 17 07 3D etc. Does anyone know of a resource where I can input those hex codes (I assume they are really 0717 and 073D) and find what ttf fonts would cover those characters? I'm guessing they are from an Aramaic script font. Is there maybe an existing font in CentOS or EPEL that I might try?

2 1

hda: no DRQ after issuing WRITE
by Matt 22 Nov '08

22 Nov '08

I upgraded my Centos 4.7 server last night. Switched from a cheaper 50$ asus motherboard to a Supermicro motherboard. I also, using dd, copied entire 500g SATA seagate drive to new 500g SATA seagate drive so as to have two copies in case something went wrong. Anyway, now I keep getting this error: Nov 21 06:08:33 server kernel: hda: status timeout: status=0xd0 { Busy } Nov 21 06:08:33 server kernel: Nov 21 06:08:33 server kernel: ide: failed opcode was: unknown Nov 21 06:08:33 server kernel: hda: no DRQ after issuing WRITE Nov 21 06:08:34 server kernel: ide0: reset: success Found one website that told me too try hdparm -i to see whats up: /dev/hda: Model=ST3500320AS, FwRev=SD15, SerialNo= Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=0kB, MaxMultSect=16, MultSect=off CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 AdvancedPM=no WriteCache=enabled Drive conforms to: unknown: * signifies the current active mode So from recommendation on website I did this to match MaxMultiSect: hdparm -m16 /dev/hda then tried this to turn MultSect off: hdparm -m0 /dev/hda Still getting error. The Supermicro MBD-X7SBL-LN1-O motherboard has basically all defaults set in bios. Any ideas? Thanks. Matt

4 6

SYD flood dropped on Sendmail (centos 4.x)
by Chris Heiner 21 Nov '08

21 Nov '08

My guys, My firewall seems to block an attack my Centos / Sendmail boxes on port 110. These servers require a reboot after each attack. My firewall says it's blocked? Do I need to patch something on sendmail? Or is my firewall not doing its job (Sonicwall)? This is not the first time this has happened. 11/20/2008 02:53:04.864 - SYN flood attack dropped - 75.2.205.141, 48102 - 10.80.80.210, 110 11/20/2008 03:08:04.864 - SYN flood attack dropped - 75.2.205.141, 64955, greatcooks.biz - 10.80.80.220, 110 11/20/2008 03:23:08.864 - SYN flood attack dropped - 75.2.205.141, 43068, greatcooks.biz - 10.80.80.210, 110 Any input would be much appreciated. Thanks.

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