Discuss October 2010

discuss@lists.centos.org

256 participants
227 discussions

Not receiving mail
by Dotan Cohen 19 Oct '10

19 Oct '10

I have installed Postfix, Dovecot, and Squirrelmail on a CentOS 5.5 machine. In Squirrelmail a user can send mail, but he is not receiving replies. There is nothing relevant in the maillog other than the user's (successful) login attempts. I am at loss, I have been following tutorials such as the Perfect Server [1] series and other Google results, but I cannot get this thing to receive mail. What should I be checking? Thanks! [1] http://www.howtoforge.com/perfect-server-centos-5.5-x86_64-ispconfig-2 -- Dotan Cohen http://gibberish.co.il http://what-is-what.com

5 7

Password Expiry
by Manish Kathuria 18 Oct '10

18 Oct '10

Hello, Is there any command / option available on CentOS to expire a user's password immediately ? I remember using "passwd -e" on some other distribution but the -e option does not seem to be present on CentOS 5.x. Thanks, Manish

3 3

qemu-kvm segfaults on starting guests
by Negative 18 Oct '10

18 Oct '10

I have a Centos 5.5 on an AMD 64 system (Athlon II x2 250). I caught up on updates today, including -- kernel 2.6.18-194.17.1.el5 -- glibc 2.5-49.el5_5.5.i686 I have several guests that were working before the update, but now none of them will boot. With each attempt I get a message in /var/log/messages: -- kernel: qemu-kvm[xx]: segfault at 000000379fc0da11 rip 00002b9f2732283f rsp 00000000446a6e80 error 7 Has this happened to others? Any fix. I see similar bugreports, but they are not recent, and not quite like this. The closest thing I can find was on an nvidia list about vmware posted today -- so maybe this has something to do with needing to rebuild the nvidia drivers with every kernel update. Any ideas?

2 2

escape .c files to html code with bash how?
by Jozsef Vadkan 18 Oct '10

18 Oct '10

i need to encode .c files to html, like on this website: http://centricle.com/tools/html-entities/ i tried to write a bash script for it: http://pastebin.com/raw.php?i=mZKAw4c5 but it's not working very well :D does anyone has a script, that does this? thank you :\

3 2

using a Laptop as a KVM console?
by Rudi Ahlers 18 Oct '10

18 Oct '10

Hi all, Has anyone seen something like this before: I want to use a laptop as a KVM console. Basically when a technician goes to one of our datacentres, or clients he has to look for a free LCD, keyboard & mouse to connect to a server (no network access, reinstall, troubleshoot failed kernel / HDD, etc). And then hopefully there's an open power socker in that cabinet. So I'm thinking why not just use a laptop instead? It already has an LCD, keyboard, mouse & power. Surely someone has, or may still, build something that could connect to the laptop's USB port(s) and then to the server's VGA & USB / PS2 ports, then act as a KVM? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Re: [CentOS] yum list updates error (Manish Kathuria)
by Ritika Garg 18 Oct '10

18 Oct '10

There was no proxy in the file /etc/yum.conf. I specified the proxy setting and now "yum list updates" is working. A part of the output was: Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: centos.01link.hk * updates: centos.01link.hk * addons: centos.01link.hk * extras: centos.01link.hk Updated Packages ImageMagick.i386 6.2.8.0-4.el5_5.2 updates ImageMagick.x86_64 6.2.8.0-4.el5_5.2 updates NetworkManager.i386 1:0.7.0-10.el5_5.1 updates Its written Updated Packages. Does this mean it has already updated? I thought that this command displays packages that need to be updated.

2 1

iptables: comprehensive tutorial for CentOS?
by Boris Epstein 18 Oct '10

18 Oct '10

Hello listmates, I know this may sound stupid... but I am trying to set up a firewall/filter/forwarder using CentOS 5.5 machine as a platform and I am succeeding but only partially. Fro example, I am literally trying to forward HTTP and HTTPS (TCP 80 and 443) from the public interface to a private IP and TCP 80 works like a charm whereas TCP 443 seems to be a no-go. To that effect: does anyone know of a comprehensive relevant manual? I mean, I must be doing something wrong here though I ain't sure what. Any advice and suggestions much appreciated. Boris.

2 2

Intel DP55WG centos 5.5 support?
by Coert Waagmeester 18 Oct '10

18 Oct '10

Hello all, I have looked around on the HCL and on other hardware sites. Do any of you have experience with Centos 5.5 64 bit on these motherboards? Regards, Coert Waagmeester

3 2

ip based acl at snmp v3?
by MontyRee 18 Oct '10

18 Oct '10

Hello, all. My system is centos 5.x and I would like to set IP based (acl) accessl-list at snmp verison 3. As I know, at snmp v1/v2c, we can set acl like below. ------ snmpd.conf -------- rocommunity public 127.0.0.1 rocommunity public 10.0.0.1/24 rouser testuser createUser testuser MD5 "passwords" DES --------------------------------------------------- But, how about snmp version 3? I searched and tried, but I could't find the answer. Surely, I can set hosts.deny or iptables, But I want to know how to set acl at snmpd.conf. Thanks in advance.

1 0

yum list updates error
by Ritika Garg 18 Oct '10

18 Oct '10

Before doing "yum update" on system which has CentOS5.3, I gave "yum list updates" but the following message comes: Loaded plugins: fastestmirror Determining fastest mirrors Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=x86_64&repo=os error was [Errno 4] IOError: <urlopen error (110, 'Connection timed out')> Error: Cannot find a valid baseurl for repo: base

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Discuss October 2010