Discuss

discuss@lists.centos.org

34753 discussions

Unable to mount devices in rescue mode
by Edward Diener 02 Aug '10

02 Aug '10

Booting to CentOS 5.5 works and I am able to login with all my devices mounted. When I boot from the install DVD and type "linux rescue" I eventually get the message, after attempting to have one of the screens mount my partitions in read/write mode: "An error occurred trying to mount some or all of your system. Some of it may be mounted under /mnt/sysimage." But nothing appears mounted under /mnt/sysimage. Does anybody have any idea of why this error is happening ? Should I try mounting my CentOS 5.5 partitions manually at this point ?

2 2

Boot message about "resume device"
by Edward Diener 02 Aug '10

02 Aug '10

When I boot CentOS 5.5, I receive the message: Unable to access resume device ( UUID = some UUID etc. ) How do I find out what actual device to which this UUID refers ? It does not appear to be a block device since it does not show when I try 'blkid'. To what does "resume device" refer ? The boot succeeds but I would like to know what this messages means.

3 4

A proposed CentOS mailing list FAQ
by m.roth＠5-cent.us 01 Aug '10

01 Aug '10

Folks, I threatened to do this a few months ago.... Here's a first draft. I was thinking of it as something that might get posted the beginning of the month, or sent to someone who drops in with "it doesn't work!!!". PLEASE feel free, no, *please* rip, shred, tear, rend this, and help me make it usable. mark ##################################################################### 1. This mailing list is here for folks around the world to share knowledge about CentOS and Linux. This is not a paid tech support organization - if you want that, buy a RedHat subscription. 2. We are not here to do your job for you. If you think we should, perhaps you should pay us. Before asking us, have you: a) read the documentation (RTFM)? b) checked the CentOS wiki for howtos and FAQs? i) <http://centos.org>, and click on "information" ii) <http://wiki.centos.org/> c) googled for documents on the Web? 3. Many of your problems have been discussed and solved. Feel free to ask for a link to the solution, or the discussion. 4. When you post a question, a) mention the version of CentOS, and of any other software; b) give a full explanation of the problem, not merely "networking is broke, how do I fix it", or something like that, and c) Include error messages if possible. Do *not* put pages of them - edit so that you give only a few lines of example, or only the relevant message lines, not, say, the entire dump of dmesg.

9 11

PHP 5.2 on CentOS 4
by Torintino T 01 Aug '10

01 Aug '10

How can i upgrade from PHP 5.1.6 to PHP 5.2.9 on CentOS 4. Thanks _________________________________________________________________ Hotmail: Free, trusted and rich email service. https://signup.live.com/signup.aspx?id=60969

4 6

Trying to get a grasp on NTP server/client access control options
by Niki Kovacs 31 Jul '10

31 Jul '10

Hi, I'm currently sinking my teeth into NTP, to build a local time server. So far, configuring a local NTP server and getting the clients to connect to it works well. Now, I'm thinking about securing the whole thing. BTW, I made a copy of the original ntp.conf file and started my own from scratch. Right now, I have five printed books opened on the corresponding chapters (Carla Schroder's Linux Cookbook, RHEL 5 Unleashed, Foundations of CentOS, etc.) plus the same amount of online tutorials. Right now I'm having a bit of a hard time grasping the various access control options. Here's a few lines from ntp's default configuration in CentOS : --8<------ /etc/ntp.conf ----------------------------------------------- ... server 0.centos.pool.ntp.org server 1.centos.pool.ntp.org server 2.centos.pool.ntp.org ... restrict 0.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery restrict 1.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery restrict 2.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery ... --8<-------------------------------------------------------------------- This means roughly : "use these three public NTP servers to synchronize, but don't let them mess with your configuration". Now, here's something from NTP's official documentation : You may use either a hostname or IP address on the 'server' line. You *must* use an IP address on the 'restrict' line. Here's the according link to the documentation : http://support.ntp.org/bin/view/Support/AccessRestrictions Which leads me to the assumption that these three 'restrict' lines in the default ntp.conf configuration in CentOS are useless, since they specify hostnames, and not IP addresses. Correct me if I'm wrong. Cheers, Niki

2 1

Automated Reply from Dieter Thiel <centos-announce@centos.org>
by Dieter Thiel 31 Jul '10

31 Jul '10

Abwesenheitsnotiz: Vielen Dank für Ihre Nachricht. Ich bin ab dem 16.08. wieder im Büro erreichbar. In dringenden Fällen wenden Sie sich bitte an Herrn Ostermann, Email <ostermann(a)dimast.de>. Vielen Dank!

1 0

Re: [CentOS] CentOS5.5 cannot boot
by cjzjm100 31 Jul '10

31 Jul '10

I hava not CentOS's CD,but i had made a live-usb of debian5,when i entered its rescue mode ,i found it need a CD,then i entered a shell ,but i cannot find the fs,i donnot know how i can mount the fs,because it hadnot mount command,any idea? I find CentOS had some problem:sometime there is a fs error,all icons cannot load ,then i tried log in the shell,it said there was fs error,however i rebooted the system ,everything was ok! In all those problem,i had not do any bad thing to the system.

1 0

DHCPD
by tony.chamberlain＠lemko.com 30 Jul '10

30 Jul '10

Not sure if there is a DHCPD/PXE forum so I will ask here. I have been trying to get netboot to work (i.e. a machine with nothing on it but a NIC card, no linux, no operating system, whatever) boots up and receives a file from a dhcp server. This dhcp server gives it all the Linux stuff it needs so a full install can be done over the network. I actually got this working by turning my desktop into a DHCP server and placing the Linux images. My problem? Now everyone, especially with windows machines, is complaining that their machine keeps telling them "unknown network" and "no internet connection". Oops, my DHCP server was intercepting all the other DHCP requests normally for our actual router (192.168.5.1). I can get around this by unplugging my machine from the LAN and just having it on a very small network with only two IPS (my desktop DHCP server and the machine doing the boot). However, I would rather stay connected to the LAN especially if I have to go out over it to get an install package (like DDD). Can I somehow tell my desktop only to handle PXE requests and anything else should go to 192.168.5.1? Couple minor questions but I can save time asking here too: I can't figure out the correct "option" or keyword to assign host name via DHCP. Is there a way I can have a user choose whether to install 4.5 or 5.4 (CentOS) via boot? I put multiple choices into the C0 file but it ignored all but one.

3 2

Samba PDC + BDC using LDAP
by Basil Kurian 30 Jul '10

30 Jul '10

I am trying to implement Samba Domain Controller with replication using LDAP . My intention is to create two Samba DC servers with LDAP backend , then to set one as master and other as slave , then replicate LDAP database in master to slave I shutdown second samba server and only first samba DC was running . Then I added one XP client to first samba server , I can successfully logged in to the domain Then I shutdown first server and started second server (every settings in first and second server is same . Also the ID is set to same value using * setlocalid* command ) but the xp can't login to the domain .. please help me to figure out the problem I documented every thing in a wiki ....... please go through the steps ......... http://wiki.basil-kurian.co.cc/index.php/SMB_DC_WITH_REPLICATION

2 2

mdstat and /dev/mapper
by Jerry Geis 30 Jul '10

30 Jul '10

hi all, In the past I used software RAID-1 and monitored /proc/mdstat to make sure things were ok in the array. I am starting to play with /dev/mapper and was wondering how I monitor this for a disk going bad. Thanks, Jerry

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