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RE: [CentOS] SATA vs. SAS
by Bowie Bailey 22 Aug '07

22 Aug '07

Feizhou wrote: > > > Option 1) 2 servers each having 2.0TB raid disk with SAS > > > drives, 2GB ram and standard other features. > > > > If going down this road, why not look into getting one of > > those fancy new storage enclosures where the RAID is built > > into the enclosure and can allow 2 servers to simultaneously > > access the arrays with full battery backed write-back cache? > > > > What is available for Linux in this department? http://www.coraid.com/ These are relatively inexpensive network storage boxes using SATA drives and AoE (ATA over Ethernet) connection to the server. Drivers build easily on CentOS. Just make sure you get drives that are on their compatible list. This may not be as much of an issue now, but I had some problems with drives being marked bad and dropped out of the array when I first set up mine a couple of years ago. This was caused by firmware incompatibilities and fixed by upgrading the drive firmware. Once this was fixed, everything has worked flawlessly since. -- Bowie

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problem with poppassd
by mailadmin＠baladia.gov.kw 22 Aug '07

22 Aug '07

Dear All, I have recently installed CentOS 5 and is workin perfect i recently download n installed poppassd daemon ver 1.6a so as to let the users to change their password but when i try to change password i get the folling error 500 'BAD PASSWORD: it is based on a dictionary word' i tried googlin arround and tried to play with system-auth-ac file in /etc/pam.d but no use my system-auth-ac is as below auth required pam_env.so auth sufficient pam_unix.so nullok try_first_pass auth requisite pam_succeed_if.so uid >= 500 quiet auth required pam_deny.so account required pam_unix.so account sufficient pam_succeed_if.so uid < 500 quiet account required pam_permit.so password requisite pam_cracklib.so try_first_pass retry=3 password sufficient pam_unix.so md5 shadow nullok try_first_pass use_authtok password required pam_deny.so session optional pam_keyinit.so revoke session required pam_limits.so session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid session required pam_unix.so really apprecite your help regards simon -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Force run of quotacheck at boot
by Dogsbody 22 Aug '07

22 Aug '07

Hi All, I think I have managed to corrupt my quota files so I need to run `quotacheck` but that needs the partition to have quotas off or be unmounted which isn't ideal for a production system :-p I was trying to find a way to force the system to do a full `quotacheck -cvuga` on a reboot but on looking in rc.sysinit it seems it will only force a quotacheck on boot when fsck finds problems with the disk. Anyone know of a way to force this (touch a file etc.)? Thank you in advance Dan

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Memory: 2056396k/4194304k available
by g.bacci＠flagmail.it 22 Aug '07

22 Aug '07

I have a centos 5 server running on olidata tegeo server with 2 opteron 1800 and 8GB ram. I installed centos 32bit so I should be able to use 4GB. My system on boot recognize 4GB ram but allocate only 2GB. Extract from dmesg: Warning only 4GB will be used. Use a PAE enabled kernel. 3200MB HIGHMEM available. 896MB LOWMEM available. Memory: 2056396k/4194304k available (2043k kernel code, 39416k reserved, 846k data, 232k init, 1179584k highmem) Why it suggest me to "Use a PAE enabled kernel."? Thanks. Giuliano.

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RE: [CentOS] new CentOS 5 as DNS server
by pctech＠mybellybutton.com 22 Aug '07

22 Aug '07

Hi folks, As a breather from the "thread-now-wider-than-my-headers-window-in-thunderbird" conversation re: mixing repos, I have a question regarding a machine I'm about to put online. :) I run a web hosting company and my secondary (primary to the world) DNS box died from a massive rootkit/hack last night. It was running an old Slackware 9.1 installation and I will be completely cleaning those drives sector-by-sector. After which I'll be installing CentOS 5 on that hardware. As it will be a production server and this is my first foray into CentOS/SELinux in a production environment I was hoping to get a recommended list of what to include and, more specifically, what *not* to include from the distro CDs I will be doing a text based install, hoping to avoid the installation of X. Other than BIND and vsftpd, I don't think I need much. This machine will be pulling zone files from my primary web server and storing some archive files and backups for me. I'm dilligently R`ingTFMs, and will continue to.... I'd sure be appreciative of any jumpstart help and/or any pitfalls of which to be cognizant. ----------------------------------------------------------------- Sorry for my broken ass webmail, but I don't have access to a real mail client at the moment. Personally I would recommend against installing any service that isn't absolutely necessary. Such as FTP. On a DNS server, if that's all it is going to be, there is no need for FTP services. If you need to upload things to the server, use scp, which is a part of SSH. The install is going to add alot of services that you probably won't need on the server, such as sendmail. Shut down any service that you don't need. The fewer services running the fewer attack vectors. You will never get it "hack proof". What you will get is something that "script kiddies" may not bother with in favor of easier targets. Like the old saying goes, "You don't have to run faster than the cheetah. You just have to run faster than the man running next to you." I would also, if possible, disallow root logins to the server via SSH. Configure it so that you have to log in as a normal restricted user and then su to root. ------------------------------------------------------------------ TIA, ~Ray _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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RE: [CentOS] 'service' command not present
by pctech＠mybellybutton.com 22 Aug '07

22 Aug '07

I just did an install of CentOS 5 on one of my machines. However, when I try to use the 'service' command (such as 'service httpd start') I get an error that the service command is not found. Why would that be? Where does this command come from? I can launch the services just fine using the respective /etc/init.d/ entries. --------------------------------------------------------- Sorry for the broken webmailer... Are you performing these actions as root? A user that does not have root access cannot start services. You will either need to su to root or sudo the action. --------------------------------------------------------- -- Cheers, Trey ---- Dieters live life in the fasting lane. Linux fedora7.thesizemores.us 2.6.22.1-41.fc7 i686 GNU/Linux 16:51:36 up 1 day, 5:56, 2 users, load average: 0.08, 0.02, 0.01 _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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dialog boxes on X
by Jerry Geis 22 Aug '07

22 Aug '07

All, I have been looking at zenity to pop up messages on the X screen. Is there another alternative to zenity that I have not found? I need to be able to completely remove the OK button, I cannot find a way in zenity to do this. also It would be nice to have a --timeout 5 option on the command line also. Any suggestions? Jerry

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"Parallel port is busy; retry in 30 seconds..."
by Mark Hull-Richter 22 Aug '07

22 Aug '07

How do I clear this condition? Must I reboot, or is there a less drastic action? Thanks. mhr

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High Performance SSH/SCP - HPN-SSH
by Yuji Tsuchimoto 22 Aug '07

22 Aug '07

Dear CentOS lovers, Could you consider to include a patch, http://www.psc.edu/networking/projects/hpn-ssh/ for openssh maybe as CentosPlus packages? It has great speed impact for long-distance ( high delay ) transfer. Regards, Yuji Tsuchimoto

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Progress on the decTOP
by Robert Moskowitz 22 Aug '07

22 Aug '07

The unit has two sets of two USB ports. Each port is marked. One for the keyboard, another for the mouse, a third for the ethernet, and the forth for the printer. If I put the USB DVD/CDRW in the mouse port, and the keyboard in the printer port, I see the USB driver loading, and the CD is recognized. For both Centos 4.5 and 5.0 I have submitted a bug report on the Centos 5 crash further into the install.....

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