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List of users on system
by Lee W 13 May '05

13 May '05

Hey All, Does anyone know of a way of getting a list of all the users on a system though PAM. I know that I could just list the /etc/passwd file but I'm trying to write something that is more generic and will also work for NIS or LDAP (etc) lookups. I suppose it is probably unlikely to be there as it is probably a security risk. I need to globally update the password aging settings (which I can do though chage/passwd) on existing accounts. Thanks in advance Regards Lee

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RE: [CentOS] centos + kswapd0 error
by mbeltran＠americatel.com.sv 13 May '05

13 May '05

Hello Mr. Hughes When i try to upgrade my kernel with yum check-update, yum does not display the version of the kernel that you recomend. Do you know the link where i can get it? Best regards. Mario -----Mensaje original----- De: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org]En nombre de Johnny Hughes Enviado el: Friday, May 13, 2005 12:19 PM Para: CentOS ML Asunto: Re: [CentOS] centos + kswapd0 error _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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RE: [CentOS] centos + kswapd0 error
by mbeltran＠americatel.com.sv 13 May '05

13 May '05

-----Mensaje original----- De: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org]En nombre de Ash Christopher Enviado el: Friday, May 13, 2005 1:35 PM Para: CentOS mailing list Asunto: RE: [CentOS] centos + kswapd0 error -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Johnny Hughes Sent: Friday, May 13, 2005 1:04 PM To: CentOS ML Subject: RE: [CentOS] centos + kswapd0 error On Fri, 2005-05-13 at 12:45 -0600, mbeltran(a)americatel.com.sv wrote: > >> Hi all > >> > >> I have a box with Centos 4 and qmail with all pathches. since Last month > i > >> have had twice the same problem. The process kswapd0 uses all my > resources > >> of CPU and RAM memory and the consequence is that my local queue grow up > and > >> the box go slow too. > >> > >> The first time i guess the problem was the version of the kernel, so i > did > >> an upgrade form kernel.i686 2.6.9-5.0.3.EL to kernel.i686 2.6.9-5.0.5.EL > >> > >> apparently the problem was solved but today the problem came again. The > >> following snapshot shows the situation: > >> > >> > >> top - 10:53:48 up 16 days, 20:05, 1 user, load average: 119.27, 116.16, > >> 114.33 > >> Tasks: 528 total, 13 running, 515 sleeping, 0 stopped, 0 zombie > >> Cpu(s): 5.4% us, 89.4% sy, 0.0% ni, 0.3% id, 4.8% wa, 0.0% hi, 0.1% > si > >> Mem: 2075012k total, 2073404k used, 1608k free, 71056k buffers > >> Swap: 4192924k total, 4192924k used, 0k free, 36380k cached > >> > >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > >> 60 root 17 0 0 0 0 D 75.4 0.0 585:22.79 kswapd0 > >> 2164 root 15 0 1736 484 432 S 31.0 0.0 31:57.07 > couriertcpd > >> 16334 vpopmail 19 0 2660 804 668 R 24.7 0.0 0:01.69 imapd > >> 2158 root 15 0 3264 488 432 S 23.4 0.0 1:17.51 > couriertcpd > >> 32608 apache 16 0 21604 8440 3016 R 15.5 0.4 1:38.09 httpd > >> 15284 vpopmail 18 0 4384 1032 760 R 14.9 0.0 0:08.32 > vdelivermail > >> > >> > >> > >> I really do not know what thing should i do for solve this problem > >> > >> thanks in advance > >> > >> Mario > > > >I think this bug is your problem: > > > >https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=150971 > > > >You can try the kernel at: > > > >http://people.redhat.com/davej/kernels/RHEL4/RPMS.kernel/ > > > >(or I can give you version 2.6.9-6.37.EL that is in 4Update1 beta) > > Hi Mr. Hughes > > The kernel version 2.6.9-6.37.EL has known issues >That is the only other one I have for EL4 (other than the released >kernels). >Maybe the 2.6.9-10.EL then ... but that is pretty new ... he just made >it yesterday :) Hi again Mr Hughes So sorry but i forgot the question mark :S I really want to know if this kernel has known issues (The kernel version 2.6.9-6.37.EL has known issues?) regards Mario

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Problem with Webmin
by Lic. Noel Alvarez Peron 13 May '05

13 May '05

I have installed CentOS 4.0 in a P-III 256Mb RAM 600 Mhz. When I try to install webmin-1.200-1.noarch.rpm, tell me: Operating system is Redhat Linux 4.OES Segmentation Fault What can I do? Regards, Noel

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RE: [CentOS] centos + kswapd0 error
by Ash Christopher 13 May '05

13 May '05

-----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Johnny Hughes Sent: Friday, May 13, 2005 1:04 PM To: CentOS ML Subject: RE: [CentOS] centos + kswapd0 error On Fri, 2005-05-13 at 12:45 -0600, mbeltran(a)americatel.com.sv wrote: > >> Hi all > >> > >> I have a box with Centos 4 and qmail with all pathches. since Last month > i > >> have had twice the same problem. The process kswapd0 uses all my > resources > >> of CPU and RAM memory and the consequence is that my local queue grow up > and > >> the box go slow too. > >> > >> The first time i guess the problem was the version of the kernel, so i > did > >> an upgrade form kernel.i686 2.6.9-5.0.3.EL to kernel.i686 2.6.9-5.0.5.EL > >> > >> apparently the problem was solved but today the problem came again. The > >> following snapshot shows the situation: > >> > >> > >> top - 10:53:48 up 16 days, 20:05, 1 user, load average: 119.27, 116.16, > >> 114.33 > >> Tasks: 528 total, 13 running, 515 sleeping, 0 stopped, 0 zombie > >> Cpu(s): 5.4% us, 89.4% sy, 0.0% ni, 0.3% id, 4.8% wa, 0.0% hi, 0.1% > si > >> Mem: 2075012k total, 2073404k used, 1608k free, 71056k buffers > >> Swap: 4192924k total, 4192924k used, 0k free, 36380k cached > >> > >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > >> 60 root 17 0 0 0 0 D 75.4 0.0 585:22.79 kswapd0 > >> 2164 root 15 0 1736 484 432 S 31.0 0.0 31:57.07 > couriertcpd > >> 16334 vpopmail 19 0 2660 804 668 R 24.7 0.0 0:01.69 imapd > >> 2158 root 15 0 3264 488 432 S 23.4 0.0 1:17.51 > couriertcpd > >> 32608 apache 16 0 21604 8440 3016 R 15.5 0.4 1:38.09 httpd > >> 15284 vpopmail 18 0 4384 1032 760 R 14.9 0.0 0:08.32 > vdelivermail > >> > >> > >> > >> I really do not know what thing should i do for solve this problem > >> > >> thanks in advance > >> > >> Mario > > > >I think this bug is your problem: > > > >https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=150971 > > > >You can try the kernel at: > > > >http://people.redhat.com/davej/kernels/RHEL4/RPMS.kernel/ > > > >(or I can give you version 2.6.9-6.37.EL that is in 4Update1 beta) > > Hi Mr. Hughes > > The kernel version 2.6.9-6.37.EL has known issues >That is the only other one I have for EL4 (other than the released >kernels). >Maybe the 2.6.9-10.EL then ... but that is pretty new ... he just made >it yesterday :) Does anyone know if the following is related to the kswapd0 error outlined above? I have had my server freeze twice (under moderate load) and give the same error in my /var/log/messages. Or, if it is not related, does anyone have any ideas what might be causing my server to freeze (hard reboot needed to bring it back up). May 13 01:54:04 galactica kernel: Unable to handle kernel paging request at virtual address 00400000 May 13 01:54:04 galactica kernel: printing eip: May 13 01:54:04 galactica kernel: c013bb4b May 13 01:54:04 galactica kernel: *pde = 00000000 May 13 01:54:04 galactica kernel: Oops: 0000 [#1] May 13 01:54:04 galactica kernel: SMP May 13 01:54:04 galactica kernel: Modules linked in: parport_pc lp parport md5 i pv6 autofs4 sunrpc dm_mod button battery ac uhci_hcd hw_random e100 mii ext3 jbd May 13 01:54:04 galactica kernel: CPU: 0 May 13 01:54:04 galactica kernel: EIP: 0060:[<c013bb4b>] Not tainted VLI May 13 01:54:04 galactica kernel: EFLAGS: 00010097 (2.6.9-5.0.5.ELsmp) May 13 01:54:04 galactica kernel: EIP is at find_get_pages+0x30/0x50 May 13 01:54:04 galactica kernel: eax: 2002002c ebx: 00000004 ecx: 00000003 edx: 00400000 May 13 01:54:04 galactica kernel: esi: 0000000e edi: dedce638 ebp: c163ae94 esp: c163ae5c May 13 01:54:04 galactica kernel: ds: 007b es: 007b ss: 0068 May 13 01:54:04 galactica kernel: Process kswapd0 (pid: 31, threadinfo=c163a000 task=c1665670) May 13 01:54:04 galactica kernel: Stack: 00000000 c163ae8c 000000b4 00000000 c0143e10 c163ae94 dedce588 00000000 May 13 01:54:04 galactica kernel: c014423a 0000000e ffffffff dedce638 00000000 00000000 c1219e60 c13b8b80 May 13 02:13:47 galactica syslogd 1.4.1: restart.

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RE: [CentOS] centos + kswapd0 error
by mbeltran＠americatel.com.sv 13 May '05

13 May '05

>> Hi all >> >> I have a box with Centos 4 and qmail with all pathches. since Last month i >> have had twice the same problem. The process kswapd0 uses all my resources >> of CPU and RAM memory and the consequence is that my local queue grow up and >> the box go slow too. >> >> The first time i guess the problem was the version of the kernel, so i did >> an upgrade form kernel.i686 2.6.9-5.0.3.EL to kernel.i686 2.6.9-5.0.5.EL >> >> apparently the problem was solved but today the problem came again. The >> following snapshot shows the situation: >> >> >> top - 10:53:48 up 16 days, 20:05, 1 user, load average: 119.27, 116.16, >> 114.33 >> Tasks: 528 total, 13 running, 515 sleeping, 0 stopped, 0 zombie >> Cpu(s): 5.4% us, 89.4% sy, 0.0% ni, 0.3% id, 4.8% wa, 0.0% hi, 0.1% si >> Mem: 2075012k total, 2073404k used, 1608k free, 71056k buffers >> Swap: 4192924k total, 4192924k used, 0k free, 36380k cached >> >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND >> 60 root 17 0 0 0 0 D 75.4 0.0 585:22.79 kswapd0 >> 2164 root 15 0 1736 484 432 S 31.0 0.0 31:57.07 couriertcpd >> 16334 vpopmail 19 0 2660 804 668 R 24.7 0.0 0:01.69 imapd >> 2158 root 15 0 3264 488 432 S 23.4 0.0 1:17.51 couriertcpd >> 32608 apache 16 0 21604 8440 3016 R 15.5 0.4 1:38.09 httpd >> 15284 vpopmail 18 0 4384 1032 760 R 14.9 0.0 0:08.32 vdelivermail >> >> >> >> I really do not know what thing should i do for solve this problem >> >> thanks in advance >> >> Mario > >I think this bug is your problem: > >https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=150971 > >You can try the kernel at: > >http://people.redhat.com/davej/kernels/RHEL4/RPMS.kernel/ > >(or I can give you version 2.6.9-6.37.EL that is in 4Update1 beta) Hi Mr. Hughes The kernel version 2.6.9-6.37.EL has known issues Regards Mario

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firstboot? CentOS 3.4
by Ken Godee 13 May '05

13 May '05

What's the best way around "firstboot" ? "firstboot" hung my machine and had to blown it up to get past it. If you bypass firstboot, what other config settings is one missing? I found the following info.... ==================================================================== # Booting without Internet Connection / Stuck on RedHat Registration during First Bootup This problem is caused by a package called firstboot. This package runs during the first boot of the machine to do some additional configurations that require your input. While most of these configuration tasks do not require a network connection, the Registration section does. The following steps will turn off firstboot: 1. Reboot your machine 2. When the grub screen displays, hightlight the line to boot RedHat Enterprise and type "e" 3. Next Hightlight the line that starts with kernel type "e" 4. Add " -s" to the end of the line and press <Enter> key. 5. Type "b" 6. Once the machine finishes booting you should have a root shell prompt that looks like sh-2.05# 7. At the shell prompt, type: chkconfig --del firstboot 8. Finally, type shutdown -r now which will reboot your machine ==================================================================== While at the console prompt should one also just uninstall the rhn-applet rpm as well? Maybe I missed some notes somewhere on this or just shouldn't worry about it and just bomb around it?????? I also noticed right after installing and logging in level 5 that it seemed that after choosing to log out, that it wouldn't log out. There appeared to be the rhn-applet running in the background holding things up. Maybe I'm just hallucinating, I've installed 3.x several times now and don't remember running into this, or have forgotten.

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centos + kswapd0 error
by mbeltran＠americatel.com.sv 13 May '05

13 May '05

Hi all I have a box with Centos 4 and qmail with all pathches. since Last month i have had twice the same problem. The process kswapd0 uses all my resources of CPU and RAM memory and the consequence is that my local queue grow up and the box go slow too. The first time i guess the problem was the version of the kernel, so i did an upgrade form kernel.i686 2.6.9-5.0.3.EL to kernel.i686 2.6.9-5.0.5.EL apparently the problem was solved but today the problem came again. The following snapshot shows the situation: top - 10:53:48 up 16 days, 20:05, 1 user, load average: 119.27, 116.16, 114.33 Tasks: 528 total, 13 running, 515 sleeping, 0 stopped, 0 zombie Cpu(s): 5.4% us, 89.4% sy, 0.0% ni, 0.3% id, 4.8% wa, 0.0% hi, 0.1% si Mem: 2075012k total, 2073404k used, 1608k free, 71056k buffers Swap: 4192924k total, 4192924k used, 0k free, 36380k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 60 root 17 0 0 0 0 D 75.4 0.0 585:22.79 kswapd0 2164 root 15 0 1736 484 432 S 31.0 0.0 31:57.07 couriertcpd 16334 vpopmail 19 0 2660 804 668 R 24.7 0.0 0:01.69 imapd 2158 root 15 0 3264 488 432 S 23.4 0.0 1:17.51 couriertcpd 32608 apache 16 0 21604 8440 3016 R 15.5 0.4 1:38.09 httpd 15284 vpopmail 18 0 4384 1032 760 R 14.9 0.0 0:08.32 vdelivermail I really do not know what thing should i do for solve this problem thanks in advance Mario

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Re: [CentOS] Re: About strongs passwords! -- PAM
by Bryan J. Smith <b.j.smith＠ieee.org> 13 May '05

13 May '05

From: Paul Heinlein <heinlein(a)madboa.com> > Can you comment on any of the smart-card hardware that you've used? Actually, given the occupation I just switched back to last month, I'd better not right now (I'm still "testing the waters" on what disclosure is allowable). I've used them in 2 industries -- defense and financial -- but there's no reason why many others can't. The priniciples to SmartCards are pretty simple. You send in a public key encrypted information (typically a symmetric key or maybe a challenge string), you get the information out. Then you can use that information as appropriate. The SmartCard is used only for 1 small operation on the _client_ for the user. (although you can also use them on the server too, for the services). And via PAM, you can route all sorts of authentication through it. I'll send you some links when I have time early next week (I'm on the road / in the air all weekend starting in a few minutes). There are a lot of more "consumer" SmartCard capabilities out there, nothing of which I've used personally. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Re: Mini-centOS -- "Thin Clients" and lack of read-only boot
by Bryan J. Smith <b.j.smith＠ieee.org> 13 May '05

13 May '05

From: Greg Knaddison <greg.knaddison(a)gmail.com> > If you want to compare CentOS to this, then you have to realize that > this "lightweight" version of MS will only run a remote desktop > session (Terminal Service), a browser (IE), a music app (MSWindows > Media Player), a virus scanner and a file navigation utility > (Explorer). They are basically "Thin Clients" using a PXE boot, although local installation is an option. Long story short, Microsoft has _never_ produced a "consumer" Windows product, not DOS7 "Chicago" nor NT, that is "read-only" bootable. That's been a major limitation of DOS/NT versus UNIX systems, they _require_ the filesystem to be "read/write" during the boot process. Most of this is due to the more "consumer" libraries designed for DOS7 "Chicago" Windows (9x/Me). At the most they've created an ultra-light Win32 kernel with just enough to RDesktop out of a EEPROM. But even when they did, companies like Wyse and many others opted for a BSD kernel with Citrix code instead of Microsoft's. This is a totally different issue. Microsoft is trying to do what UNIX X-Terminals, Workstations and other UNIX-based Thin Clients have done for years. This isn't "innovative" it's "catching up" to UNIX. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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