Discuss March 2008

discuss@lists.centos.org

300 participants
373 discussions

CentOS 5.1 Live USB NTFS Support
by Mark Rose 25 Mar '08

25 Mar '08

First of all, I was able to use the 5.1 LiveCD to create a bootable USB (8G Lexar FireFly) - thanks to all for your assistance. Question - has anyone been able to add NTFS support to an USB install? It would be a nice to have the ability to access NTFS (and Vista for that matter) disks for troubleshooting and general access. Any and all comments will be appreciated. Thanks! Mark

2 1

moving from RH8 to CentOS5.1
by Ray Leventhal 24 Mar '08

24 Mar '08

Hi all, Is there a way to 'automatically' recreate users/permissions when moving from RH8 (yes, I know...way old) to CentOS5.1 or is it just simpler to recreate the users manually? Total users on this system is < 20. Thanks in advance, -Ray

3 2

CentOS 5.1 on PS3
by James A. Peltier 24 Mar '08

24 Mar '08

Hi All, Does anyone here on the list have CentOS 5.1 running on a PS3? I would like to look at integrating a couple of PS3 nodes into our cluster for it's ability to use the Cell processor inside and was wondering if anyone had any experiences.

3 2

Strange Xen problem
by Louis Lagendijk 24 Mar '08

24 Mar '08

I have a strange problem when using Centos: When using a Xen kernel (it does not matter whether a guest is started or not) networking fails is flakey. ssl connections fail, ping reports a wrong data byte #50 ..... I am using a Sun quad ethernet card, but when I tried the gigabit Ethernet on the motherboard, I do not get the error reports from ping, but many missing replies instead. The behaviour is somewhat intermittent. But now I am using a non-Xen kernel I have no problems. there is nothing logged in /var/log/messages. I had to patch the kernel due to some missing initialisation in the sun hme driver, but as said above there are errors on other cards as well. I am probably overlooking something obvious, but hours of googling have not given any results. Any hints anybody? Louis

1 0

/etc/resolv.conf changes
by vincenzo romero 24 Mar '08

24 Mar '08

Hello all, I'm getting frustrated attempting to understand; I googled and asked folks and am unable to get a straight answer. 1. How is the /etc/resolv.conf file maintained ? I do not seem to get a consistent result when I save resolv.conf configuration from GUI or by hand using vim /etc/resolv.conf. a. Sometimes I the entries toggles between the two entries: # generated by NetworkManager, do not edit! ; Use a local caching nameserver controlled by NetworkManager nameserver 127.0.0.1 b. then when I restart the network services some the /etc/resolv.conf file appears like this: # generated by NetworkManager, do not edit! ; Use a local caching nameserver controlled by NetworkManager search lab.mycompany.com nameserver 192.168.17.2 This host is: - a DNS server that is authoritative for its domain within the 192.168.16/20 network - I believe that even as DNS server, this host should have its resolv.conf file configured to define itself as a DNS server, right? I apologize for the naive questions, but I am a newbie and am unable to gather a straightforward answer. thanks in advance. -- best, Vince

3 3

simple DNS question - reverse nslookup fails.
by vincenzo romero 24 Mar '08

24 Mar '08

Hello all, I am trying to configure a subdomain DNS server on a Cent OS 5.1 - for my lab. Brief configuration: Lab machine ---> 192.168.17.2 (should respond to DNS queries from hosts in 192.168.16.0/20 network) 1. I would also like to forward any queries outside the above network to our corporate domain (no firewalls between our 192.168.16.x network and the corporate network. The domain server is: dns.company.com with an IP of 10.100.1.2 (255.255.255.0). 2. What I have configured is: 192.168.17.2 --> myhost.lab.company.com 10.100.1.2 --> dns.company.com 3. Installed the dns bind 9 in myhost and set basic configuration via the system-config-bind GUI. My configuration file specific to my setup there is: cat lab.maxiscale.com.db $TTL 1H @ SOA myhost.lab.company.com. root.myhost.lab.company.com. ( 2 3H 1H 1W 1H ) NS myhost.lab.company.com. qaserver2 A 192.168.17.3 qaserver1 A 192.168.17.1 myhost A 192.168.17.2 ================= The rest of the DNS/Bind records were based upon the auto-generated files from the Bind GUI Config tool. 3. I also changed myhost's resolv.conf to reflect the following: search lab.mycompany.com 192.168.17.2 search mycompany.com 10.100.1.2 ====== PROBLEM: 1. When I am in myhost.com, I can perform: a. nslookup hostname (to any host within 192.168.x and 10.100.x networks) b. nslookup ip to anyhost wtihin both networks. 2. When I am in one of the hosts within 192.168.x aside from myhost.com (for example, qaserver1 or qaserver2): a: SUCCESS to nslookup hostname to any host within BOTH networks. b. FAILS to nslookup ip (reverse nslookup) to anyhost within the 10.100.x network. this is the error I get: nslookup 10.100.1.2 Server: 192.168.17.2 Address: 192.168.17.2#53 Non-authoritative answer: 24.1.100.10.in-addr.arpa name = dns.company.com. Authoritative answers can be found from: . nameserver = e.root-servers.net. . nameserver = f.root-servers.net. . nameserver = g.root-servers.net. . nameserver = h.root-servers.net. . nameserver = i.root-servers.net. . nameserver = j.root-servers.net. . nameserver = k.root-servers.net. . nameserver = l.root-servers.net. . nameserver = m.root-servers.net. . nameserver = a.root-servers.net. . nameserver = b.root-servers.net. . nameserver = c.root-servers.net. . nameserver = d.root-servers.net. a.root-servers.net internet address = 198.41.0.4 b.root-servers.net internet address = 192.228.79.201 c.root-servers.net internet address = 192.33.4.12 d.root-servers.net internet address = 128.8.10.90 e.root-servers.net internet address = 192.203.230.10 f.root-servers.net internet address = 192.5.5.241 g.root-servers.net internet address = 192.112.36.4 h.root-servers.net internet address = 128.63.2.53 i.root-servers.net internet address = 192.36.148.17 j.root-servers.net internet address = 192.58.128.30 k.root-servers.net internet address = 193.0.14.129 k.root-servers.net has AAAA address 2001:7fd::1 l.root-servers.net internet address = 199.7.83.42 ===== I must be missing something stupid and apparent .... any help would be greatly appreciated!!! :) thanks in advance! -- best, Vince

3 3

smartest way to setup new system (DELL PE 4600)
by Ray Leventhal 24 Mar '08

24 Mar '08

Hi all, One of our servers (very old) died last week and I'm setting up a new CentOS 5.1 box to replace it. Primarily used as a samba fileshare on a mostly windows-workstation network. This system will, ideally, have the OS on a 146 GB SCSI drive, with user data on a 300GB SCSI, both attached to the backplane of the 4600. My question is this: What's best practice and most desirable partitioning for doing this, and how would I go about setting up mirrors of both the OS and the user data drives? Thanks in advance for any help on what I know is a rather newbie question....please chalk it up to lack of sleep and veritable hounding by the 'higher ups' :) Kind regards, -Ray

2 1

Xen or VMWARE on CentOS 5
by Ern jura 24 Mar '08

24 Mar '08

Does anyone out there have a comprehensive tutorial on installing VMware and successfully managing virtual machines with either xen or vmware?

7 10

Health Monitoring
by Ed Donahue 24 Mar '08

24 Mar '08

Hey, I am looking for healt monitoring software for my centos5.1 box. Nothing crazy (like nagios), just something that records memory/cpu usage every min to 5 mins. I added some vmware stuff and was looking to see when if swap gets used and cpu spikes.

3 3

C5 krb5 updates do not get applied
by Bernd Bartmann 23 Mar '08

23 Mar '08

Hi, the latest Centos 5 krb5 1.6.1-17.el5_1.1 do not get applied to any of my servers. I can see the updates being available on the mirror servers, but "yum update" shows nothing. The krb5 updates for Centos 4 were installed on all of my Centos 4 servers without any problem. Does somebody have any idea what could cause the problem on Centos 5? Thanks in advance, Bernd.

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Discuss March 2008