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Server resources consumption prevention
by Abd El-Hameed Ayad 13 Nov '06

13 Nov '06

I have a CentOS 3.8 server which i manage for web hosting (web server, mail server + database server). Today i got it down because of an attack, here is the last snapshot of top command before server dies 09:47:30 up 21 days, 6:54, 1 user, load average: 363.88, 727.82, 253.42 3949 processes: 135 sleeping, 3800 running, 14 zombie, 0 stopped CPU states: cpu user nice system irq softirq iowait idle total 0.6% 0.0% 99.2% 0.0% 0.0% 0.0% 0.0% cpu00 0.4% 0.0% 99.4% 0.0% 0.0% 0.0% 0.0% cpu01 0.8% 0.0% 99.0% 0.0% 0.1% 0.0% 0.0% Mem: 2055236k av, 1935836k used, 119400k free, 0k shrd, 188120k buff 1286892k actv, 165568k in_d, 17336k in_c Swap: 2040244k av, 22676k used, 2017568k free 901000k cached PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND 6515 root 19 0 10048 9.8M 2612 R 3.9 0.4 1:06 1 cpsrvd-ssl 7175 root 18 0 564 564 492 S 2.7 0.0 0:03 0 couriertcpd 10365 nobody 19 0 11020 10M 2352 R 2.5 0.5 0:08 0 httpd 1998 root 19 0 10724 10M 2140 R 2.4 0.5 3:02 1 httpd 10719 mailnull 19 0 1892 1892 1548 R 1.8 0.0 3:49 0 exim 7169 root 19 0 552 552 476 R 1.8 0.0 0:10 1 couriertcpd 29384 manmoud 25 0 380 380 308 R 1.0 0.0 0:01 0 2-4-21 26278 manmoud 24 0 420 420 308 R 0.9 0.0 0:01 1 2-4-21 26519 manmoud 25 0 420 420 308 R 0.9 0.0 0:01 1 2-4-21 26524 manmoud 25 0 424 424 308 R 0.9 0.0 0:01 1 2-4-21 29368 manmoud 25 0 412 412 308 R 0.9 0.0 0:01 1 2-4-21 25916 manmoud 24 0 388 388 308 R 0.8 0.0 0:01 0 2-4-21 25922 manmoud 25 0 388 388 308 R 0.8 0.0 0:01 0 2-4-21 Clearly, the user manmod caused this huge load. Are there any way to prevent such high load caused by any user on the system except root?? thanx

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RE: [CentOS] Problems with LTO-3 and U320 on Centos 4.4
by Plant, Dean 13 Nov '06

13 Nov '06

Joshua Baker-LePain wrote: > On Tue, 7 Nov 2006 at 12:39pm, Plant, Dean wrote > >> I am currently testing an Overland Tape storage unit with a LTO-3 >> drive on CentOS 4.4. After a random amount of time but usually when >> we have backed up about 0.5-1TB we get scsi errors which cause the >> backup to fail. I have rebuilt the box with Solaris 10 x86 and >> Windoze to prove the hardware and have successfully backed up over >> 3TB on each OS without error. >> >> Can anyone offer advice on how to find out what is causing the error >> in CentOS. > > Your best bet to track down exactly what those errors mean would be to > head over to the linux-scsi list. But I can tell you that I've been > using an Overland LTO3 library on centos-4 for over a year now with > very good results. The 2 main differences are that I'm using an > x86_64 server (I doubt that makes much difference) and an LSI 21320 > HBA. I have had nothing but good luck with LSI adapters, and I think > it'd be worth it for you to give one a shot. > > I will say this, though. If you plan on ever using 2 drives in the > library, get the 22320, which has 2 external channels. I've been > tearing my hair out trying to get both drives in my library to write > at full speed at the same time, and no matter what driver tweaks I > make, I just can't get it to go. My 22320 arrives today, and I'm > rather hoping that'll fix the problem. I thought I would give your suggestion a go and bought in a LSI 21320R scsi card and installed a fresh copy of CentOS 4.4. Now on boot I get the following error and the Overland Library is not detected. Did you change any options in the LSI scsi bios? SCSI subsystem initialized Fusion MPT base driver 3.02.62.01rh Copyright (c) 1999-2005 LSI Logic Corporation Fusion MPT FC Host driver 3.02.62.01rh Fusion MPT SPI Host driver 3.02.62.01rh mptbase: Initiating ioc0 bringup ioc0: 53C1030: Capabilities={Initiator} scsi0 : ioc0: LSI53C1030, FwRev=01033010h, Ports=1, MaxQ=222, IRQ=169 Vendor: HP Model: Ultrium 3-SCSI Rev: G33H Type: Sequential-Access ANSI SCSI revision: 03 mptbase: ioc0: IOCStatus(0x0002): Busy mptscsi: ioc0: attempting task abort! (sc=f7d01c80) scsi0 : destination target 1, lun 1 command = Inquiry 00 00 00 3a 00 mptbase: ioc0: IOCStatus(0x0048): SCSI Task Terminated mptscsi: ioc0: task abort: SUCCESS (sc=f7d01c80) mptscsi: ioc0: attempting bus reset! (sc=f7d01c80) scsi0 : destination target 1, lun 1 command = Inquiry 00 00 00 3a 00 mptscsi: ioc0: bus reset: SUCCESS (sc=f7d01c80) mptscsi: ioc0: attempting task abort! (sc=f7d01c80) scsi0 : destination target 1, lun 1 command = Test Unit Ready 00 00 00 00 00 mptbase: ioc0: IOCStatus(0x0048): SCSI Task Terminated mptscsi: ioc0: task abort: SUCCESS (sc=f7d01c80) mptscsi: ioc0: Attempting host reset! (sc=f7d01c80) mptbase: Initiating ioc0 recovery mptscsi: ioc0: attempting task abort! (sc=f7d01c80) scsi0 : destination target 1, lun 1 command = Test Unit Ready 00 00 00 00 00 mptscsi: ioc0: task abort: SUCCESS (sc=f7d01c80) scsi: Device offlined - not ready after error recovery: host 0 channel 0 id 1 lun 1 scsi scan: 58 byte inquiry failed with code 524288. Consider BLIST_INQUIRY_36 for this device scsi0 (1:1): rejecting I/O to offline device mptbase: ioc0: IOCStatus(0x0048): SCSI Task Terminated scsi: Unexpected response from host 0 channel 0 id 1 lun 1 while scanning, scan aborted mptbase: Initiating ioc1 bringup ioc1: 53C1030: Capabilities={Initiator} scsi1 : ioc1: LSI53C1030, FwRev=01033010h, Ports=1, MaxQ=222, IRQ=177 Fusion MPT SAS Host driver 3.02.62.01rh

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Strange yum behavior
by Itay Furman 13 Nov '06

13 Nov '06

Hello, 'yum search R' returns an impossibly-long list. So I tried 'yum search R.x86_64' and 'yum search R-2.3.0' and few others to no avail. (Google revealed that R package does exist in kbsingh repository.) However, 'yum install R' did offer to install the correct package. Can someone enlighten me as to why did the searches failed or generated a hugh list of alternatives, while the install hit right on the mark? Thanks, Itay FWIW: cat kbsingh-CentOS-Extras.repo [kbs-CentOS-Extras] name=CentOS.Karan.Org-EL$releasever - Stable gpgcheck=1 gpgkey=http://centos.karan.org/RPM-GPG-KEY-karan.org.txt enabled=1 baseurl=http://centos.karan.org/el$releasever/extras/stable/$basearch/RPMS/ # Need a ftp mirror ? uncomment the line below, & disable the one above # baseurl=ftp://rpm.karan.org/pub/kbsingh/el$releasever/extras/stable/$basear… #== 2006-07-10 <itayf(a)fastmail.fm> protect plugin config ==# protect = 0 exclude = *.i386 *.i586 *.i686 includepkgs = darcs darcs-server prozilla R

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ipsec-tools with cisco vpn client
by David Hrbáč 13 Nov '06

13 Nov '06

Hi, anybody successfully running win32 client with Cisco vpn client against ipsec-tools? I'm looking for elegantly running VPN road warrior solution. Scenarios are: - ipsec-tools with Cisco vpn client - pptpd with Windows XP native client - OpenVPN with OpenVPN Windows client - ??? Any hints? Thanks for reply. David Hrbáč

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up2date dependency problem
by Alexey Loukianov 13 Nov '06

13 Nov '06

Greetings, centos. Looks like postinstall scriplet in CentOS4.4 distro requires /sbin/restorecon utility, which in turn resides in policycoreutils package. Meanwhile, up2date don't require policycoreutils. It seems to that there is an error in dependencies for up2date. -- Best regards, Alexey Loukianov mailto:aloukianov@lavtech.ru Software Development Department, Lavtech Corp http://mnogo.ru, http://lavtech.ru

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SQUID access URL and Port
by Adriano Frare 13 Nov '06

13 Nov '06

Dear Friends, I am using ACL for user access Internet by SQUID, but I need all users access site http://sivolks1.volkswagen.com.br:5169/indexteste.html. How do it ? Thanks for all Adriano Frare

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CUPS disabling a print queue between jobs
by fredex 13 Nov '06

13 Nov '06

Hi! on centos 4.4 (fresh install) I've got a problem with CUPS disabling a print queue between jobs. Sometimes it will print dozens of jobs before disabling the queue, sometimes it will do it after every job. This is a networked HP Laserjet printer at work. At home on a 4.4 box (upgraded from 4.3) with a local (parallel port) printer I've not seen this problem occur. (of course, I don't print as much on the printer at home, either.) I see this bug in the cups bug tracker: http://www.cups.org/str.php?L1648 and it sounds as if it might be the same thing, though it is against cups 1.2, while Centos appears to have 1.1.22. Can anyone shed any light on it, especially how to make it stop happening? Thanks! -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- "For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart." ---------------------------- Hebrews 4:12 (niv) ------------------------------

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Server resources consumption prevention
by Abd El-Hameed Ayad 12 Nov '06

12 Nov '06

2 3

Server resources consumption prevention
by Abd El-Hameed Ayad 12 Nov '06

12 Nov '06

1 0

Re : Alpha Server 1000A 5/400 Centos 4.3 instalerl can not find the hard drives
by Stewart Walker 12 Nov '06

12 Nov '06

Can any one recommend a raid controller for the above server for centos? -- This message has been scanned for viruses and dangerous content by MailScanner at caspercollege.edu and is believed to be clean.

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