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Kernel Panic
by Ryan Nichols 10 Jun '08

10 Jun '08

I am very very new to the linux world.. I am having problems with CentOS5.1 with kernel panics. I belive the cause of the kernel panics are a software that I am running on the machine, but I cannot find any information as to what the system was doing prior to the crash, i have looked in the /var/log/messaging to no solution. I guess what I am asking is what do i need to turn on for when this kernel crash comes again? It happens with in hours or days of running this software, it is random and sudden. Thanks, Ryan Nichols

2 1

Help!
by Sam Drinkard 10 Jun '08

10 Jun '08

Folks, I have a bit of a problem and can't seem to figure out what is getting broken or why. I've been pulling my hair out trying to get clamav or clamav-milter to install and permit yum update to continue. What is happening is this: I yum install the clamav package, but when I try to do an update on the system, it constantly returns with an error of a Missing Dependency for clamd and clamav-db. I've installed and erased clamav several times, and that's the only way I can do a yum update on the system. The files are coming from sourceforge, and the version is 0.93-2.el4rf. Perhaps I'm not installing in the correct sequence or something, so could someone please tell me how to go about getting all the dependencies for the clamav package? This is the x86_64 version I've been working with. Many thanks.... Sam

6 15

Dependency problem with libgaim.so.0 when installing GNOME
by Leonardo Vilela Pinheiro 10 Jun '08

10 Jun '08

CentOS 5.1 - I have already executed 'yum clean all' but the error persists. What could be the problem? $ yum groupinstall "GNOME Desktop Environment" Loading "installonlyn" plugin Setting up Group Process Setting up repositories Setting up repositories Reading repository metadata in from local files Package gnome-panel - 2.16.1-6.el5.i386 already installed and latest version Package metacity - 2.16.0-8.el5.i386 already installed and latest version Package at-spi - 1.7.11-2.fc6.i386 already installed and latest version Package gtk2-engines - 2.8.0-3.el5.i386 already installed and latest version Package gnome-screensaver - 2.16.1-5.el5_1.1.i386 already installed and latest version Resolving Dependencies <snip> --> Processing Dependency: foomatic for package: system-config-printer-libs --> Processing Dependency: lockdev for package: gphoto2 --> Processing Dependency: libgaim.so.0 for package: nautilus-sendto --> Processing Dependency: libpq.so.4 for package: apr-util --> Processing Dependency: PyXML for package: system-config-printer-libs --> Restarting Dependency Resolution with new changes. --> Populating transaction set with selected packages. Please wait. ---> Package foomatic.i386 0:3.0.2-38.1.el5 set to be updated ---> Package PyXML.i386 0:0.8.4-4 set to be updated ---> Package lockdev.i386 0:1.0.1-10 set to be updated ---> Package postgresql-libs.i386 0:8.1.11-1.el5_1.1 set to be updated --> Running transaction check --> Processing Dependency: libgaim.so.0 for package: nautilus-sendto --> Finished Dependency Resolution Error: Missing Dependency: libgaim.so.0 is needed by package nautilus-sendto

2 1

sendmail not sending after reboot
by Ray Leventhal 10 Jun '08

10 Jun '08

HI folks, I've an up-to-date CentOS 5.x box on a small intranet (<20 users). We did a reboot over the weekend and all appears well except that clients on the LAN can no longer send email. Just hangs/times out. No clear identifiers in the /var/log/maillog or /var/log/messages. We're not setup for ESMTP as it's a closed network and I'm really hoping for a kickstart as to where to look to get this going. In case it helps, my sendmail.cf file is below. Thanks in advance. -R divert(-1)dnl dnl # dnl # This is the sendmail macro config file for m4. If you make changes to dnl # /etc/mail/sendmail.mc, you will need to regenerate the dnl # /etc/mail/sendmail.cf file by confirming that the sendmail-cf package is dnl # installed and then performing a dnl # dnl # make -C /etc/mail dnl # include(`/usr/share/sendmail-cf/m4/cf.m4')dnl VERSIONID(`setup for linux')dnl OSTYPE(`linux')dnl dnl # dnl # Do not advertize sendmail version. dnl # dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')dnl dnl # dnl # default logging level is 9, you might want to set it higher to dnl # debug the configuration dnl # dnl define(`confLOG_LEVEL', `9')dnl dnl # dnl # Uncomment and edit the following line if your outgoing mail needs to dnl # be sent out through an external mail server: dnl # dnl # define(`SMART_HOST', `smtp.your.provider')dnl dnl # define(`confDEF_USER_ID', ``8:12'')dnl dnl define(`confAUTO_REBUILD')dnl define(`confTO_CONNECT', `1m')dnl define(`confTRY_NULL_MX_LIST', `True')dnl define(`confDONT_PROBE_INTERFACES', `True')dnl define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl define(`ALIAS_FILE', `/etc/aliases')dnl define(`STATUS_FILE', `/var/log/mail/statistics')dnl define(`UUCP_MAILER_MAX', `2000000')dnl define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl define(`confAUTH_OPTIONS', `A')dnl dnl # dnl # The following allows relaying if the user authenticates, and disallows dnl # plaintext authentication (PLAIN/LOGIN) on non-TLS links dnl # dnl define(`confAUTH_OPTIONS', `A p')dnl dnl # dnl # PLAIN is the preferred plaintext authentication method and used by dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do dnl # use LOGIN. Other mechanisms should be used if the connection is not dnl # guaranteed secure. dnl # Please remember that saslauthd needs to be running for AUTH. dnl # dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl # dnl # Rudimentary information on creating certificates for sendmail TLS: dnl # cd /usr/share/ssl/certs; make sendmail.pem dnl # Complete usage: dnl # make -C /usr/share/ssl/certs usage dnl # dnl define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl dnl define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl dnl define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl dnl define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl dnl # dnl # This allows sendmail to use a keyfile that is shared with OpenLDAP's dnl # slapd, which requires the file to be readble by group ldap dnl # dnl define(`confDONT_BLAME_SENDMAIL', `groupreadablekeyfile')dnl dnl # dnl define(`confTO_QUEUEWARN', `4h')dnl dnl define(`confTO_QUEUERETURN', `5d')dnl dnl define(`confQUEUE_LA', `12')dnl dnl define(`confREFUSE_LA', `18')dnl define(`confTO_IDENT', `0')dnl dnl FEATURE(delay_checks)dnl FEATURE(`no_default_msa', `dnl')dnl FEATURE(`smrsh', `/usr/sbin/smrsh')dnl FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl FEATURE(redirect)dnl FEATURE(always_add_domain)dnl FEATURE(use_cw_file)dnl FEATURE(use_ct_file)dnl dnl # dnl # The following limits the number of processes sendmail can fork to accept dnl # incoming messages or process its message queues to 20.) sendmail refuses dnl # to accept connections once it has reached its quota of child processes. dnl # dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl dnl # dnl # Limits the number of new connections per second. This caps the overhead dnl # incurred due to forking new sendmail processes. May be useful against dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP address dnl # limit would be useful but is not available as an option at this writing.) dnl # dnl define(`confCONNECTION_RATE_THROTTLE', `3')dnl dnl # dnl # The -t option will retry delivery if e.g. the user runs over his quota. dnl # FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl FEATURE(`blacklist_recipients')dnl EXPOSED_USER(`root')dnl dnl # dnl # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery uncomment dnl # the following 2 definitions and activate below in the MAILER section the dnl # cyrusv2 mailer. dnl # dnl define(`confLOCAL_MAILER', `cyrusv2')dnl dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')dnl dnl # dnl # The following causes sendmail to only listen on the IPv4 loopback address dnl # 127.0.0.1 and not on any other network devices. Remove the loopback dnl # address restriction to accept email from the internet or intranet. dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl dnl # dnl # The following causes sendmail to additionally listen to port 587 for dnl # mail from MUAs that authenticate. Roaming users who can't reach their dnl # preferred sendmail daemon due to port 25 being blocked or redirected find dnl # this useful. dnl # dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl dnl # dnl # The following causes sendmail to additionally listen to port 465, but dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1. dnl # dnl # For this to work your OpenSSL certificates must be configured. dnl # dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl dnl # dnl # The following causes sendmail to additionally listen on the IPv6 loopback dnl # device. Remove the loopback address restriction listen to the network. dnl # dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl dnl # dnl # enable both ipv6 and ipv4 in sendmail: dnl # dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6') dnl # dnl # We strongly recommend not accepting unresolvable domains if you want to dnl # protect yourself from spam. However, the laptop and users on computers dnl # that do not have 24x7 DNS do need this. dnl # FEATURE(`accept_unresolvable_domains')dnl dnl # dnl FEATURE(`relay_based_on_MX')dnl dnl # dnl # Also accept email sent to "localhost.localdomain" as local email. dnl # LOCAL_DOMAIN(`localhost.localdomain')dnl dnl # dnl # The following example makes mail from this host and any additional dnl # specified domains appear to be sent from mydomain.com dnl # dnl MASQUERADE_AS(`mydomain.com')dnl dnl # dnl # masquerade not just the headers, but the envelope as well dnl # dnl FEATURE(masquerade_envelope)dnl dnl # dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well dnl # dnl FEATURE(masquerade_entire_domain)dnl dnl # dnl MASQUERADE_DOMAIN(localhost)dnl dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl dnl MASQUERADE_DOMAIN(mydomain.lan)dnl MAILER(smtp)dnl MAILER(procmail)dnl dnl MAILER(cyrusv2)dnl DAEMON_OPTIONS(`Name=smtp,Modifiers=b')

6 21

mod_security
by Tony Schreiner 10 Jun '08

10 Jun '08

I've set up a CentOS 5 system as a server for http installs. Currently up-to-date with httpd-2.2.3-11.el5_1.centos.3 mod_security-2.1.7-1.el5 my installs were failing just after the root password set up, before software selection. I tracked it down to a server error 500 and it was due to mod_security claiming the comps.xml file was too big The error: [Tue Jun 10 09:59:01 2008] [error] [client XXX.XXX.XXX.XXX] ModSecurity: Output filter: Content-Length (934390) over the limit (524288). [hostname "XXX.XXX"] [uri "/install/centos/5/x86_64/ repodata/comps.xml"] [unique_id "VJNb-4inMQIAACd0XcwAAAAA"] This is set in /etc/httpd/mod_security.d/modsecurity_crs_10_config.conf SecResponseBodyLimit 524288 I increased that size and all is now well, but can somebody enlighten me as to the purpose of that setting? I've started reading the document in /usr/share/doc/mod_security-2.1.7/doc/modsecurity2-apache-reference.pdf is there other good documentation for mod_security? Cheers, Tony Schreiner Boston College

1 0

RE: [CentOS] Confirming grub installation
by Bowie Bailey 10 Jun '08

10 Jun '08

Peter Farrell wrote: > > 2008/6/9 Bowie Bailey <Bowie_Bailey(a)buc.com>: > > I have two drives in a software mirror. Other than setting the > > bios to boot from the second drive, is there any way to confirm > > that grub is installed properly on the second drive? > > When installing CentOS - sometimes the RAID-1 /boot partition, usually > /dev/md0 fails to boot. > > The bug is known and exists on the bugtracker for CentOS as well as > RedHat. > > The fix is to re-install GRUB on on each partition of the RAID-1 > array. > > I think you could use the same method to answer your question. <SNIP> > If you then want to test it, disconnect one of your drives - or just > drop into grub at boot > and tell it to boot from the partition of another drive. I already know how to install grub on the second drive. The issue is that this is a production server and I'm trying to avoid rebooting it if possible. I'm looking for a way to determine whether grub is installed on a drive WITHOUT having to actually attempt to boot from it. If I redo the installation, then I can be sure it's installed, but if it's already there, I'd rather leave it alone. There's no point in messing with it if it's already installed. -- Bowie

2 1

Clustersuite package installation failed in Itanium server
by Balaji 10 Jun '08

10 Jun '08

Dear All, I am new in Itanium server Installation and I have installed all the CentOS4.4 ia64 CDs and I have try to install clustersuite packages and i am getting the following error messages like error: %post(package name here) scriptlet failed, exit status 255 and error: %pre(package name here) scriptlet failed, exit status 255 problem Cluster Suite RPMS are ccs-1.0.7-0.i686.rpm ccs-devel-1.0.7-0.i686.rpm cman-1.0.11-0.i686.rpm cman-devel-1.0.11-0.i686.rpm cman-kernel-2.6.9-45.4.centos4.i686.rpm cman-kernel-hugemem-2.6.9-45.4.centos4.i686.rpm cman-kernel-smp-2.6.9-45.4.centos4.i686.rpm cman-kernheaders-2.6.9-45.4.centos4.i686.rpm dlm-1.0.1-1.i686.rpm dlm-devel-1.0.1-1.i686.rpm dlm-kernel-2.6.9-42.12.centos4.i686.rpm dlm-kernel-hugemem-2.6.9-42.12.centos4.i686.rpm dlm-kernel-smp-2.6.9-42.12.centos4.i686.rpm dlm-kernheaders-2.6.9-42.12.centos4.i686.rpm fence-1.32.25-1.i686.rpm gulm-1.0.8-0.i686.rpm gulm-devel-1.0.8-0.i686.rpm iddev-2.0.0-3.i686.rpm iddev-devel-2.0.0-3.i686.rpm ipvsadm-1.24-6.i386.rpm kernel-hugemem-2.6.9-42.EL.i686.rpm kernel-smp-2.6.9-42.EL.i686.rpm magma-1.0.6-0.i686.rpm magma-devel-1.0.6-0.i686.rpm magma-plugins-1.0.9-0.i386.rpm perl-Net-Telnet-3.03-3.noarch.rpm piranha-0.8.2-1.i386.rpm rgmanager-1.9.54-1.i386.rpm system-config-cluster-1.0.25-1.0.noarch.rpm We are not sure why this is happening. Can some one throw light on this. Regards -S.Balaji

3 4

mac address in prompt
by Gergely Buday 10 Jun '08

10 Jun '08

Hi there, for some reasons bash writes out my host's mac address as a result of including \h in PS1. Do you know why? This was not always so. [gergoe@x0-13-xx-xx-xx-xx ~]$ echo $PS1 [\u@\h \W]\$ - Gergely

2 3

School Server Setup
by Harry Sukumar 10 Jun '08

10 Jun '08

Hello All!!! I was wondering if you can help me little bit.... I am trying to help (voluntary service) a country side school (Aboriginal community) in Northern Queensland Australia setup lab infrastructure, it's a very remote school and they don't have enough funds to go commercial The school has only till grade 6 They have 25 machines that was bought out of the government grant but none of the machines come with windows I was asked by the school president to setup lab infrastructure currently they have Internet (Dynamic) with only two machines connected I have asked them to change the plan to Static IP address which I presume will be done some time this week I have decided to go Linux on all the machines including the server Could some one please cast some light on how I can carry on with this project, I am not sure where to start and I am fairly new to Linux and system administration world Currently what's in my mind is to setup fedora on all desktop and CentOS5 as my server with following services configured Proxy-squid (all the traffic to pass through) Firewall Apache Squirrel mail DNS DHCP I am not sure where to start with this project Your help will be highly appreciated by the little kids who have never even touched a computer before in there life!!! -- Many Thanks Harry

11 13

Hardware Specs
by Victor Padro 10 Jun '08

10 Jun '08

Hello all! I was wondering if you can help me a little bit... My boss wants me to do some research in finding which hardware is most used under Linux(ex. Dell servers, Barebones Kits, HP & Compaq servers, etc.) This is just for budgeting issues...he wants to get rid of some old and obsolete hardware we run and wants to know which hardware could be easy to deploy on the server side and workstations side(common user boxes will be decided for HP or Dell leasing quotes - Obviously M$ Windows Vista). So if you could just state your hardware I'll be very greatful. We run several servers based on RHEL, Debian(Couple Ubuntus), CentOS, running services such as Sendmail, Apache, JBoss, Postgres, Oracle, Samba and DNS. We have around 5000 users logging on these servers. Workstations are basically used for CAD, monitoring, developing in Java, PHP, Oracle, etc. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Hola a todos! Me preguntaba si me pueden ayudar un poco... Mi jefe quiere que haga un poco de investigacion para ver que hardware es el que mas se usa corriendo Linux(ej. servidores Dell, servidores HP & Compaq, equipos armados, etc.) Esto es por el presupuesto que tendremos ademas se quiere deshacer del equipo viejo y obsoleto que tenemos, quiere saber que tipo de hardware es el que facil de desplegar/utilizar en el lado de los servidores y de las estaciones de trabajo(los equipos de los usuarios comunes[los mortales] serian decidos por los leasing que Dell o HP nos cotize, obviamente con M$ Windows Vista) Asi que si pueden describir su hardware se los agradecere. Corremos varios servidores basados en RHEL, Debian(un par de Ubuntus), CentOS usando servicios como Sendmail, Apache, JBoss, Postgres, Oracle, Samba y DNS. Tenemos mas o menos 5000 usuarios loggeandose en estos servidores. Las estaciones de trabajo son basicamente usadas con software CAD, monitoreo, desarrollando en Java, PHP, Oracle, etc. Thank you/Gracias. Victor Padro

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