Discuss

discuss@lists.centos.org

34753 discussions

Guidelines for CentOS Mailing List posts
by Vandaman 14 Jan '09

14 Jan '09

Some people don't know how to conduct themselves on usenet and mailing lists. Despite the mailing list guidelines being crystal clear about no html posting and not top-posting we have people still doing so. People still use text-readers to access the mailing list so you could be denying access to these people by flouting the mailing list guidelines. This is an example of top-posting http://lists.centos.org/pipermail/centos/2009-January/070494.html There are legitimate newbies who top-post because they know no different and can acquaint themselves with the mailing list guidelines at http://www.centos.org/modules/tinycontent/index.php?id=16 Maybe the guidelines can updated to say trimming of emails as well and maybe link to examples on Wikipedia of top-posting and bottom-posting. Newbies aside, there are guys still top-posting who have ignored polite offlist messages not to top-post. Its not the time to be nannying people over how to behave on mailing list. Regards, Vandaman.

10 13

RAID level and killing a job
by Scott R. Ehrlich 14 Jan '09

14 Jan '09

First question - under CentOS 5, if I created non LVM partitions on a server with 6 disks - 2 disks are RAID 1 (OS), how do I remind myself or inquire the type of RAID of the remaining 4 disks (RAID 1 or RAID 5), without having to reboot? Second question - A newly installed server consisting of CentOS 5.2, straight off the DVD, I invoke a command by hand, realize I want to kill it soon after (logged in as root). I issue ps auwx|grep name_of_command, get the PID, and issue kill -9 PID. ps auwx|grep name_of_command is still running. The command is NOT part of any scheduled job. Why won't the process die? How else can I kill it without a system reboot? The command does not get invoked with a script, and is not a script itself - just a standalone binary. I tried CNTL-Z and CNTL-C. I finally killed the terminal it was running from. Nothing works. pkill doesn't work, either. Thanks. Scott, CISSP

4 4

time command with options
by Jerry Geis 14 Jan '09

14 Jan '09

I am trying to get timing paramters from a CGI program. date is just a command for example used here. when I do: time { date; } everything is good. when I do: time -o file { date; } I get time -o file { date; } bash: syntax error near unexpected token `}' How do I correctly issue the command with an option for -o file to output the data to a file. Thanks, Jerry

5 4

acroread = resource hog
by Ed Donahue 14 Jan '09

14 Jan '09

Any have trouble with acroread taking up massive cpu and memory? I exited my Firefox browser and the lil bastard was still hogging up my resources. Took up 69% of 4GB, and wouldn't let go, until a kill -9 showed'em, have to do it every time I open a pdf in firefox. Any use Xpdf or something else?

7 6

gcc 4.1 and OpenMP?
by Davide Cittaro 13 Jan '09

13 Jan '09

I was modifying a source to add OpenMP capabilities. I knew that gcc supports OpenMP since version 4.2, so I've compiled a recent (4.3.2) gcc and installed in my home directory, this because gcc shipped with CentOS 5.2 is 4.1. I've then noticed that my executable links /usr/lib64/libgomp.so, installed with gcc 4.1 from CentOS rpms... Is CentOS default compiler OpenMP ready? Does this mean I don't have to compile my own compiler? Thanks d Davide Cittaro davide.cittaro(a)ifom-ieo-campus.it

2 1

Re: [CentOS] [OT] Remote control of a WinXP machine from a Linux host
by Marko Vojinovic 13 Jan '09

13 Jan '09

On Monday 12 January 2009 09:01, Sorin Srbu wrote: > >> ssh -L 3390:private-ip-of-remote-XP-machine:3389 > >> username@ip-or-hostname-of-remote-NAT-server > > > >Well, first, private-ip-of-remote-XP-machine is dynamic, given by my ISP's > >dhcp server, so I cannot have 100% guarantee that it will always be the > > same. And I have no easy way of finding it out if it does change. > > Can't you use one of those free dyndns-thingies? That way you'd always > connect to my.homecomputer.com (or something) instead of an arbitrary ip. Umm, no, not when my IP address is 10.0.1.2.3 or such --- it is not publicly visible, so dns is useless. Best, :-) Marko

2 1

Re: [CentOS] [OT] Remote control of a WinXP machine from a Linux host
by Marko Vojinovic 13 Jan '09

13 Jan '09

On Saturday 10 January 2009 22:48, you wrote: > I am confused by your description. Do you mean you have Machine A and > Machine B and you want to be able to access both of them at any time > over the next three years from Machine C but you could be behind a > firewall with machine C i.e. I assume you will be traveling and that's > the reason so you never know what network you will be coming out of? No, the main problem is that A is behind my ISP's NAT. I want to access it from C (yes, I'll be travelling a lot and C might be just about anywhere). But the problem is that since A is behind a NAT, the connection must be initiated from A's side to C. Also, since C might be behind some other NAT, the connection must be initiated from C's side to A. This simply cannot work simultaneously, so I tried to make use of my public server B which can be used as a "bridge" between A and C. So, A connects to B, C connects to B, and then A and C communicate. Roughly speaking... That was my initial idea, but seems too complicated to work out, so I asked for a possible easier alternative. :-) > Or if want your own set up you could of course for example run some > sort of remote access service like VNC and just pay for a static IP > for Machine A from its ISP and set up Port Forwarding for VNC That would be the most obvious solution, if only the ISP were willing to give me a static IP. But they are not. :-( > (or if > you don't want to pay use http://www.no-ip.com/ and use their free dns > service where you can create a free dns name for use with dynamic > ip's. You just install their software on Machine A and it will login > to No-IP.info and check your ip is still current and if not update it > like if your IP changes because your dsl line drops for a minute and > you get a knew ip?). Hmmm... This is interesting. I'll look up to www.no-ip.com, but I think that such dns trick may work only with public IP numbers. And A's IP is of type 10.0.*.* which is a no-go, afaik. However, I might ask the ISP to provide me with a public IP. It could still be dynamic, but public rather than local, and in that case the trick with the dns just might work... ;-) Thanks for the pointer! Best, :-) Marko

4 4

Bugs in yum update
by Mike -- EMAIL IGNORED 13 Jan '09

13 Jan '09

This is a continuation of the thread: "yum update fails: CentOS 5.2". I installed a fresh Centos 5.2 and ran yum update. It ran correctly, except for these issues: 1. As previously mentioned, after deciding what it is going to do, It doesn't ask if its ok. But if I type y<enter> it reports: Is this ok [y/N]: Downloading Packages: 2. During the long period it is downloading files, it doesn't print anything, giving the impression that nothing is happening. Watching the lights, and using WireShark and ARIN, I determined that it was downloading from the Rochester Institute of Technology. I decided that was good. During the install phase, the expected logging appeared. 3. When it said it was finished, it didn't exit the yum process; I did it with CRTL-C . Mike.

6 10

[OT] Remote control of a WinXP machine from a Linux host
by Marko Vojinovic 13 Jan '09

13 Jan '09

Sorry for an off topic post, but a lot of you folks are sysadmins here or there, and just might have a suggestion... ;-) I have a WinXP machine that is to be unattended for a period of 3 years (yes, I know, it sounds ridiculous, but still...). What I need is remote access to it to perform regular system maintenance, virus cleanups, occasional software installations, reboots, config changes, etc. Of course, rdesktop would do it, or vnc server or something else. The problem is that this machine is behind a NAT, and I cannot access it remotely from outside (and I need access from whereever on the planet I may happen to be). Basically, I need to setup some type of ssh tunnelling from XP (machine A) to my static-IP-24/7-high-bandwidth-CentOS server (machine B) and then further to my laptop (machine C, Fedora 10) located elsewhere (possibly behind another NAT, I can't know in advance). I have root access for all three machines (A, B and C). Of course, all three are on different LANs. However, I have never done anything like this before, so I wonder what is the best method of creating such a setup? One of my ideas was to make some script on A which would connect to B once every 15 minutes or so, look for a flagfile, and if present, initiate connection with C directly or through B if necessary. That means, if I want access from C to A, I ssh from C to B and create a flagfile, wait 15 minutes or so, and a rdesktop (or vnc or other) appears on my laptop. In theory. Or is there some other XP-tool that might do what I want out of the box? However, it need be absolutely automatic, there will be nobody around to do anything locally on A once I leave it. Another idea I had was to have machine A running as a virtual machine on a CentOS host (vmware or such would suffice). Then I could easily configure the above A-to-B-to-C scenario, shutdown the virtual A, pull its hard disk file to C, start it locally, perform maintenance, push it back to host A and run it again as a vm. But this is highly complicated, takes too much time and bandwidth, so I hope something simpler is available. Yet another idea is to ask A's ISP to provide a static IP for that machine, or to forward some available port to A, which could be used by rdesktop in some customized fashion. But the ISP may refuse such requests, and I need a robust solution. Yet even another idea is to put another CentOS machine (D) between A and A's ISP (create a local LAN). Then initiate ssh -X connection from C to D (somehow, via flagfile scenario or such), and then rdesktop from D to A over a local LAN. The main problem is NAT, if machine A had a world-accessible IP, I would just rdesktop from C to A, but alas, it doesn't... :-( Any suggestions about the best way of doing this? Thanks, :-) Marko

10 14

webmail question
by chloe K 13 Jan '09

13 Jan '09

Hi I am using squirrel webmail and the impa sometimes is timeout What should I increase the performance? Thank you --------------------------------- Yahoo! Canada Toolbar : Search from anywhere on the web and bookmark your favourite sites. Download it now!

2 1

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss