Discuss October 2009

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338 participants
325 discussions

CentOS 5.4? anyone? - "debate"
by Gabriel - IP Guys 16 Oct '09

16 Oct '09

Dear All, If someone asks a question such as "When is Centos 5.4 coming out" bare in mind that it may be because they genuinely want to know when it's coming out, and feel that somehow, they have not been privy to that information. To me, I see CentOS as a polished professional product given what it is, a repackaging of RHEL, and to that end I have the expectation of a fully fledged professional product, which includes static release dates. (I know it's not always possible, so please, no flames) I say this with love, and all the maturity that goes with it, "I can't WAIT for CentOS 5.4!!!" but at least I have the luxury of understanding the process which prevents 5.4 from coming out on a particular day. The owners of 600 or so servers out there which I look after, like to believe they are techie people, because they can use Google, and they can read a few articles that say Centos 5.4 on the way. I get very regular emails asking why there server is still on centos 5.2, and I have to explain, if it's not broke, I'm not fixing it! On TV, when you watch a commercial that tells you of the latest blockbuster movie - there is a date attached. The next butt kicking FPS for Xbox 360... has a release date. So many products that have a "limited" life span (iPods, games consoles, mobile phones, books, songs) are planned with a "static" release date, and if that date is missed, bad press is almost a guarantee! The point I'm making, is that people have become used to knowing when things will happen. (I believe this is illustrated in the number of people fascinated with Flash Forward! Google is your friend). So, give them a break - and the idiots that insult other people who obviously do not understand how things work need to instead take the time, and understand that the internet is no longer the domain/hangout of the technically savvy. Even Linux is no longer the realm of only the technical geniuses, (although there are a lot of us!) When someone asked "When will *CentOS 5.4 come out??* The answer is, "When it is good and ready", and when they ask "Why/What does that mean?", ask them to Google "open source distribution release cycle". That should keep them busy for long enough for me/you to actually get some work done J --- Kind Regards, Mr Gabriel

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routing using iproute2 nexthop
by Bazy 16 Oct '09

16 Oct '09

Hello Everyone, I configured a server for a friend's Internet cafe. He has 2 ISPs. Here is what I did: ## NAT -A POSTROUTING -s 10.0.0.0/255.255.255.128 -o eth2 -j SNAT --to-source 82.77.148.83 -A POSTROUTING -s 10.0.0.0/255.255.255.128 -o eth0 -j SNAT --to-source 83.103.190.175 ## Removing default routing /sbin/ip rule add prio 50 table main /sbin/ip route del default table main ## Default gateway using nexthop /sbin/ip rule add prio 201 from 82.77.148.83/25 table 201 /sbin/ip route add default via 82.77.148.1 dev eth2 src 82.77.148.83 proto static table 201 /sbin/ip route append prohibit default table 201 metric 1 proto static /sbin/ip rule add prio 202 from 83.103.190.175/27 table 202 /sbin/ip route add default via 83.103.190.161 dev eth0 src 83.103.190.175 proto static table 202 /sbin/ip route append prohibit default table 202 metric 1 proto static /sbin/ip rule add prio 222 table 222 /sbin/ip route add default table 222 proto static nexthop via 82.77.148.1 dev eth2 nexthop via 83.103.190.161 dev eth0 ## Running ping so kernel is aware if a gateway is down /bin/ping 82.77.148.1 >/dev/null & /bin/ping 83.103.190.161 >/dev/null & My problem is that if the second gateway (83.103.190.161) stops responding the kernel will not notice and will keep forwarding traffic to it. Only if I "ifdown" the interface it will see it as down. As you can see above I run a continuous ping to both gateways. I'm just out of ideas... [root@dell ~]# ip route show table 222 default proto static nexthop via 82.77.148.1 dev eth2 weight 1 nexthop via 83.103.190.161 dev eth0 weight 1 dead Thanks, Bazy

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Sparc?
by ML 16 Oct '09

16 Oct '09

HI All, I have acquired a Sun Fire VL 240. I know there is not a SPARC version of CentOS. Can anyone recommend a good OS for a machine that will do apache, postfix, mysql, etc. I know this is sort of a loaded question, but I don't have a lot of knowledge on distros that are stable on Sparc. -Jason

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continuing issues with %post
by David Mehler 16 Oct '09

16 Oct '09

Hello, I'm trying to do an unattended CentOS 5.3 install. For the most part it's working. As of right now i'm statically assigning the machine an IP which i believe will allow %post to resolve names? I also like knowing where the box will show up. I am however having a few issues and I'm probably thinking to complicated on them. My first one is the fact that updates aren't working from %post. Under the assumption name resolution is working, see above with the static configuration, the issue is then most likely importing of gpg keys. I've got these lines in %post: # GPG keys echo "Importing GPG keys ..." rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY* /usr/bin/yum -y update When they're uncommented the box hangs, i'd love to see output. My second issue is a cosmetic one. I want to set a standard prompt in /etc/bashrc. Out of the box the bashrc PS1 lines: if [ "$PS1" ]; then [ "$PS1" = "\\s-\\v\\\$ " ] && PS1="[\u@\h \W]\\$ " I have to make changes to that second line so a sed substitution would probably be my best bet. I'm not sure how to grab the part i need and change it. Manually i change that line to: PS1='\u@\h:\w\$' I'd like to get %post to do that for me. Next, i'd like to alter /boot/grub/grub.conf. I want to set it up for serial terminal support, so i have to add a serial and terminal lines at the top of the file say after any comment blocks that might or might not be there plus add console=tty0 and/or console=ttyS0,9600n8 to the append lines to however many kernels are there. Again, i'm assuming sed but i'm not sure how to get the parts i need and edit. I want to do other things, mostly with security, increasing password complexity requirements and pam, but that should be easy once i figure out how to alter the right sections in files. Any help appreciated. Thanks. Dave.

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post install freezes
by David Mehler 16 Oct '09

16 Oct '09

Hello, I'm doing an unattended CentOS 5.3 install in a virtual machine vmware. I'm redirecting output to a serial console because production boxes won't have monitors. I'm getting to the point of doing the post installation then the box freezes. The only command i have in %post is yum -y update. I'm not getting no output. Suggestions appreciated. In the commands section reboot is explicitly called so that at the end of the install the vm will reboot. Thanks. Dave.

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timekeeping on VMware guests
by Carlos Santana 16 Oct '09

16 Oct '09

Howdy, I am having time-drift issues on my CentOS VM. I had referred to following documentation: http://wiki.centos.org/TipsAndTricks/VMWare_Server , however it didn't help. I used kickstart for creating this VM and I am listing important steps in ref to timekeeping issue. Any comments or suggestion would be appreciated. - CS. ------------------- # For EL5 virtual machines, Append the following in Grub to help keep the clock from drifting # and to reduce the interupt requests # 32bit: --append="rhgb quiet divider=10 clocksource=acpi_pm" # 64bit: --append="rhgb quiet notsc divider=10" bootloader --location=mbr --md5pass=$1$mXSD1l6mO$BBCk1gYArAATS7dlCQGthN. --append="rhgb quiet divider=10 clocksource=acpi_pm" %packages --nobase # Other packages not listed here # ntp was installed ntp ### Add step-tickers ### cat > /etc/ntp/step-tickers <<\EOF2 0.centos.pool.ntp.org 1.centos.pool.ntp.org EOF2 ### End of step-ticker file ### -------------------- # Applied patch mentioned on CentOS page # http://wiki.centos.org/TipsAndTricks/VMWare_Server patch --verbose -b -l -i /root/ntp.patch -------------------- VMware Tools not installed. -------------------- Thanks, CS.

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Re: [CentOS] Sparc?
by Tim Nelson 15 Oct '09

15 Oct '09

----- "ML" <mailinglists(a)MailNewsRSS.com> wrote: > HI All, > > I have acquired a Sun Fire VL 240. I know there is not a SPARC version > > of CentOS. > > Can anyone recommend a good OS for a machine that will do apache, > postfix, mysql, etc. > > I know this is sort of a loaded question, but I don't have a lot of > knowledge on distros that are stable on Sparc. > > -Jason I've been an avid Sun/SPARC user/abuser/collector for some time now. For my boxes in production, I typically run FreeBSD at it seems to be the closest to "Linux world" to keep the learning curve shorter since my roots lie there. It is rock solid and performs well, even on older hardware like my Enterprise 420r. Debian works also although I don't have enough experience with it on SPARC to truly comment. If you're looking for pure usability, *BSD or Debian may be your best bet. If you want top notch performance, you're probably better off with (Open)Solaris. And of course, it all depends on your comfort level. There was Aurora Linux at one time for a Redhat based system running on SPARC. The site is still available although it appears to be largely dead: http://auroralinux.org/ . If you have any other SPARC related issues/questions, you are more than welcome to mail me off-list. Tim Nelson Systems/Network Support Rockbochs Inc. (218)727-4332 x105

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CentOS-announce Digest, Vol 56, Issue 4
by centos-announce-request＠centos.org 15 Oct '09

15 Oct '09

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2009:1500 Important CentOS 3 x86_64 xpdf - security update (Tru Huynh) 2. CESA-2009:1500 Important CentOS 3 i386 xpdf - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Thu, 15 Oct 2009 13:03:48 +0200 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2009:1500 Important CentOS 3 x86_64 xpdf - security update To: centos-announce(a)centos.org Message-ID: <20091015110348.GA10978(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2009:1500 xpdf security update for CentOS 3 x86_64: https://rhn.redhat.com/errata/RHSA-2009-1500.html The following updated file has been uploaded and is currently syncing to the mirrors: x86_64: updates/x86_64/RPMS/xpdf-2.02-17.el3.x86_64.rpm source: updates/SRPMS/xpdf-2.02-17.el3.src.rpm You may update your CentOS-3 x86_64 installations by running the command: yum update xpdf Tru -- Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

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Inquiry:What is the equivalent of nmap command on CentOS 5.2 ?
by hadi motamedi 15 Oct '09

15 Oct '09

Dear All Please be informed that I have installed CentOS 5.2 on my client but it does not have nmap command . Can you please do me favor and let me know what is the equivalent of nmap command on CentOS 5.2 ? Thank you in advance

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Re: [CentOS] CentOS Digest, Vol 57, Issue 14
by tony.chamberlain＠lemko.com 15 Oct '09

15 Oct '09

Thanks for the responses. I think this is what I want to do. I commented out #Defaults requiretty in /etc/sudo. But what I really wanted to do was just place it in VPNUSERS: %vpnusers ALL=NOPASSWD: /sbin/service myciscovpn start, \ /sbin/service myciscovpn stop, \ /sbin/service myciscovpn status, \ /usr/bin/mycisco, /usr/local/bin/vpnclient visudo took it but it did not work. Actually if I could just put it in user tony that would be best: tony ALL=(ALL) NOPASSWD: ALL !requiretty But that gives a syntax error. What is the correct way to specify it? -----Original Message----- > Well, I noticed that ssh/scp probably requires tty and when called > from a script, its not from a tty. > > At least in my case which was drupal calling a script that lauched > ssh, a non tty source. > > I also required running privileged commands. > > Mebbe you don't need all this so check your logs and see what happens. > My last job, I was setting up rsync backups. What I did was create a user, backup, then in /etc/sudoers, have !requiretty *only* for that user. The user was also limited in what commands it could run (in that case, rsync only). Don't forget to log in as that user first, so that you don't get the "Oh, This is a new IP, are you Sure you want to continue connecting?!?!" mark

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Discuss October 2009