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Copying files from specific date.
by Rajeev R. Veedu 09 Jun '08

09 Jun '08

Dear all, Does anyone aware of any utility to copy files which are created or modify form a specific date ?. Thanks Rajeev R. Veedu

3 2

Re: [CentOS] Dell 1950 Perc 6/i with centos 4.5
by Steve Moccio 09 Jun '08

09 Jun '08

Jeff, I cant thank you enough. I not only did this for the kernel but I did this for the pxeboot's jumpstart installation of 4.5. Thanks again for taking the time to respond. ---- On Sat, 7 Jun 2008, Jeff Collins (jeff(a)chpscchome.org) wrote: I had a somewhat similar problem with a Dell 2600 running Centos 4.4. I found that 4.6 no longer had the megaraid driver for my card, so I:Here is a detailed description of what I did, and perhaps this may be of help if you adapt it to your situation.============================================================================================== This is a brief description of how to set up the 4.6 kernel so that it will boot on list.The reason that the stock CentOS 4.6 kernel will not boot on list is that LSI and Dell madethe decision to remove support for the PERC/LSI controller adapter shipped with the PowerEdge2600 from the 4.6 kernel. The new megaraid subsystem supports the PERC/LSIcontrollers shipped with the newer PowerEdge 2900 models. The stock 4.5 and 4.6 kernelswill not boot on an older 2600.The 4.4 kernel is called 2.6.9-42.EL or 2.6.9-42.ELsmp in the symmetric multiprocessor version.The 4.6 kernel that first shipped is called 2.6.9-67. The current topof tree is 2.6.9-67.0.15 as of May 13 2008). When we compare the megaraid_sas.cdrivers (for example), we see that a lot of generic support has been taken out of the newerversion, compared with the driver from 4.4 (2.6.9-42.EL).For a full scan of the differences between all source files in the megaraid directory, seenewdifftxt in this directory.So what we have to do is take out a top of tree 4.6 kernel, wipe out all the code in themegaraid directory, put back all the old megaraid code, then build a kernel. To get theold source kernel, use www.rpmfind.org to search for the proper kernel:kernel-2.6.9-42.EL.src.rpm. The current top of tree source magically appears in/usr/src/redhat/BUILD/kernel-2.6.9/linux-2.6.9 when we performyum install kernel* and follow the instructions to build a custom kernel.This is not trivial, but all the instructions are athttp://wiki.centos.org/HowTos/Custom_KernelThe basic steps I took were slightly different:-----------------------------------------------1) Download the stock 4.4 kernel source using rpmfind2) Build the stock 4.4 kernel, install, and test boot it to validate the process.3) Save off the megaraid directory code which is probably in/usr/src/redhat/BUILD/kernel-2.6.9/linux-2.6.9/drivers/scsi/megaraid4. Change the name of the prior kernel to something like/usr/src/redhat/BUILD.old, etcSo you get [root@list scsi]# ls /usr/src/redhat/BUILD BUILD.old RPMS SOURCES SOURCES.old SPECS SPECS.old SRPMS5. Download the top of tree kernel sources for the version we are on (Centos 4)6. Blast the contents of/usr/src/redhat/BUILD/kernel-2.6.9/linux-2.6.9/drivers/scsi/megaraidand replace with the old megaraid code you saved.7. Build and test the kernel (The instructions tell us to use rpmbuild to create a full rpmpackage, but I took the shortcut of just making a stock kernel from the top of theBUILD/kernel-2.6.9/linux-2.6.9 directory. The steps area. make oldconfigb. make menuconfig (you can take out extra modules if you wish, but make sureyou know what you are doing. It is easy to create a kernel that does not boot)c. make -j 4 bzImaged. cp ./arch/i386/boot/bzImage /boot/vmlinuz-2.6.9-your-versione. cp System.map /boot/System.map-2.6.9-your-versionf. make -j 4 modulesg. make modules_installh. mkinitrd /boot/mkinitrd-2.6.9-your-version.img 2.6.9-your-versioni. edit /etc/grub.conf to add your kerneli. sync; rebootj. Choose your kernel (do not make it the default until it has been tested!)k. Test your kernelSo on list we end up with four Linux kernels:The first is the old smp kernel first shipped as CentOS 4.4.The second is a test kernel for use in creating a custom install CD set.The third is the patched 4.6 kernel we are running.The fourth is the uniprocessor stock kernel shipped as CentOS 4.4.Since grub counting is 0 based, we have set the default to 2 so we boot thethird kernel by default (2.6.9-jgc).Here is the grub.conf file in /etc===========================================================================# 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 (hd0,1)# kernel /vmlinuz-version ro root=/dev/sda6# initrd /initrd-version.img#boot=/dev/sda2default=2timeout=5splashimage=(hd0,1)/grub/splash.xpm.gzhiddenmenutitle CentOS-4 i386 (2.6.9-42.ELsmp) root (hd0,1) kernel /vmlinuz-2.6.9-42.ELsmp ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.9-42.ELsmp.imgtitle CentOS-4 i386 (2.6.9-prep) root (hd0,1) kernel /vmlinuz-2.6.9-prep ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.9-prepimgtitle CentOS-4 i386 (2.6.9-jgc) root (hd0,1) kernel /vmlinuz-2.6.9-jgc ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.9-jgc.imgtitle CentOS-4 i386-up (2.6.9-42.EL) root (hd0,1) kernel /vmlinuz-2.6.9-42.EL ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.9-42.EL.imgtitle dos rootnoverify (hd0,0) chainloader +1 ============================================================================Perhaps this will be of some help to you, Jeff CollinsCommunity Health Partnership of Santa Clara County

1 0

Re: RE-export nfs mounted share
by David G. Miller 09 Jun '08

09 Jun '08

"whoami i" <hicheerup(a)gmail.com> wrote: > Hi Barry, > > First of all thanx for your reply but i already used the options > crossmnt,fsid=0 in my exports file still i am not able to re-export it. > > > Regards > lingu > > On Fri, May 30, 2008 at 5:30 PM, <centos-request(a)centos.org> wrote: > > >> > Send CentOS mailing list submissions to >> > centos(a)centos.org >> > >> > To subscribe or unsubscribe via the World Wide Web, visit >> > http://lists.centos.org/mailman/listinfo/centos >> > or, via email, send a message with subject or body 'help' to >> > centos-request(a)centos.org >> > >> > You can reach the person managing the list at >> > centos-owner(a)centos.org >> > >> > When replying, please edit your Subject line so it is more specific >> > than "Re: Contents of CentOS digest..." >> > >> > >> > Today's Topics: >> > >> > 1. CentOS-announce Digest, Vol 39, Issue 13 >> > (centos-announce-request(a)centos.org) >> > 2. Re: Low-memory Centos5? (Anne Wilson) >> > 3. Re: Low-memory Centos5? (Wojtek Pilorz) I think we just found another argument as to why top-posting is a bad idea... You can easily miss the fact that you included the whole digest and not just the message you're actually replying to. Cheers, Dave -- Politics, n. Strife of interests masquerading as a contest of principles. -- Ambrose Bierce

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OT: really dumb question about APC UPS
by Jamie Lists 09 Jun '08

09 Jun '08

We have about 4 servers connected to an APC UPS. The UPS only has one UPS connection. So my question is, in a power outage how do i get all my servers to safely shutdown? Do i run a USB hub? Do i write a script on the one machine connected to turn off all the other machines? I'm confused. Jamie

5 4

Chroot'ed SSH
by Filipe Brandenburger 09 Jun '08

09 Jun '08

Hi, Is anyone chrooting users that connect through SSH? I looked for it on Google and I basically saw several methods: - OpenSSH 5 supports ChrootDirectory (FC9 apparently has RPMs that probably could be rebuilt under CentOS 5) - There seem to be several patches for OpenSSH 4.x to do the chroot, the most popular seems to be http://chrootssh.sf.net/ - There appears to be a pam_chroot - There are solutions based on setting the user's shell to a script/binary that does the chroot By quickly looking at yum list, it doesn't seem like neither RHEL nor CentOS directly support any of those, at least I didn't find any RPMs for any of those. If anyone is doing it, I would like to know what were your experiences and if you would recommend doing it or not. I'm specially interested in anything that doesn't involve replacing the OpenSSH that comes with CentOS, after all, that's what CentOS is all about, if you start replacing the pieces, what's the point... Thanks a lot! Filipe

3 3

Hardening CentOS by removing "hacker" tools
by Filipe Brandenburger 09 Jun '08

09 Jun '08

Hi, My boss asked me to harden a CentOS box by removing "hacker" tools, such as nmap, tcpdump, nc (netcat), telnet, etc. I would like to know which list of packages would you remove from a base install. I would appreciate if someone could point me to a "standard" way of doing this. I know there are procedures for hardening a machine (I remember reading about Bastille Linux) but I don't know how effective they are and if they include the removal of such tools in their procedures. Any advice would be very appreciated! Thanks, Filipe

13 17

Regd: Linux Boot-Up Front-end show details and hide details configuration files
by Balaji 09 Jun '08

09 Jun '08

Dear All, During CentOS Boot-Up user can See all of the standard messages within this front-end by clicking on the 'show details' link. and hide the standard messages within this front-end by clicking on the 'hide details' link. I need to implement my own software like this, so i need yours help I tried to google-out and i can't find out the show details and hide details configuration files Please, do the needful. Regards -S.Balaji

1 0

RE-export nfs mounted share
by whoami i 09 Jun '08

09 Jun '08

Hi Is there any way to re-export an nfs mounted directory? I am having three servers runnning on centos4.5 and i am trying to implement nfs share in an below manner [bcoz there is no alternative way for me to setup nfs share] HOST A--->>>EXPORTS /prod/data ------->>>HOST B HOST B ---->>MOUNTED ------>>> /prod/data-----UNDER---/PROD1 [working fine] HOST B EXPORTS /PROD1 ------>>>>HOST C HOST C ----->>TRY MOUNTING ----->>>RESULT IN BELOW ERROR BUT WHEN I TRY TO MOUNT THE ALREADY MOUNTED NFS SHARE IN "HOST C " I AM GETTING BELOW ERROR. #################MOUNT ERROR########################################## mount: 10.65.64.30:/PROD1 failed, reason given by server: Permission denied ########################################################################## Can anyone suggest me the way to work out aboVE scenario. Note: I find no -r(-re-export) option in rpc.mountd REGARDS LINGU

4 3

syslog - python
by David Hláčik 09 Jun '08

09 Jun '08

Hello , i want all my log messages from python to have in /var/log/python Now they are in /var/log/messages: Jun 9 12:10:51 sx1 kernel: klogd 1.4.1, log source = /proc/kmsg started. Jun 9 12:11:01 sx1 python: MM_MEMBERS [it] Nothing to do. Jun 9 12:11:02 sx1 python: MM_MEMBERS [research] Nothing to do. Jun 9 12:12:01 sx1 python: MM_MEMBERS [it] Nothing to do. Jun 9 12:12:01 sx1 python: MM_MEMBERS [research] Nothing to do. So i have added to the end of the syslog.conf # Python python.* /var/log/python and restarted syslog, then i have created /var/log/python and for sure addedd u+rw, g +rw, o+rw permissions But, nothing, /var/log/python is empty What am i doing wrong? (Centos 5.1) Thanks

5 8

Change from gnome to KDE desktop
by Kai Schaetzl 09 Jun '08

09 Jun '08

What's the best way to do this? Remove the yum group gnome (does this set default init to 3?), install the yum group KDE and then set default init to 5 again (as I assume installing KDE not during the setup will not automatically set the system to start the gui?). Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

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