Tagged Questions

CentOS is a Linux distribution standing for "Community ENTerprise Operating System" and is a rebuild of "Red Hat Enterprise Linux" (RHEL). The "CentOS6" tag refers to versions 6.x of CentOS.

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Updating Upstart on Centos 6.3

I have a Centos 6.3 server -- alone among all my Ubuntu servers for historical reasons -- with Upstart 0.6.5. I need to update that upstart to at least 1.4, and I'd prefer to do it through yum instead ...
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1answer
2k views

AD accounts on centos 6.4 not showing up despite successfull wbinfo -u

I have a centos 6.4 box with samba 3.6.9 which I have connected to MS server 2008 R2. That part seems to work fine, since I can see my AD users and groups with wbinfo -u and wbinfo -g. What does not ...
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2answers
939 views

openLDAP Client Config for CentOS 6

I have been trying to get the users on the LDAP server to get authenticated over centOS 6 clients, but, the client will not accept the passwords of the LDAP users. I have Ubuntu Systems which ...
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1answer
144 views

Mail Authentication Randomly Failing

This started about 4 days ago on a production server. Clients started getting random incorrect password dialog boxes in their email programs, most use Outlook. This happens for email addresses on all ...
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2answers
284 views

How to clear/flush ntp server peer in Centos

We were using centos.pool.ntp.org for our clock sync among servers. Now we do ave a local NTP server, but the problem is servers are using the old ntp. From centos.pool.ntp.org we can see, ...
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1answer
469 views

530 Login incorrect - vsftpd w/SSL (Not using PAM?)

I cannot log in with any local users on my vsftpd running on CentOS6 32-bit. The server simply reports login incorrect. My log files look like this: [doctorblue@guardian ~]$ sudo tail ...
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2answers
658 views

Allow non-root process to listen on port 80 without doing anything drastic

For reasons beyond my comprehension, GlassFish refuses to play ball with iptables. That is, with all the correct redirection rules in place, it won't receive any redirected traffic. So I'm at plan B ...
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3answers
419 views

Httpd processes using more memory over time

I am using a 3gb memory VPS Centos 6 server.If I reboot it I get about 4 or 5 httpd services running and all of them use about 2.5% of memory (86m on the res column from top command). I am running ...
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2answers
234 views

Relationship between /etc/hosts and iptables?

I'm running a DigitalOcean Centos 6 VPS. Here's the script I used to set up iptables on Centos 6.4 64-bit: #!/bin/sh service iptables stop iptables -A INPUT -p tcp --tcp-flags ALL NONE -j DROP ...
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1answer
54 views

Remote client trying to connect to vsftpd in CentoOS returning Connection refused

I'm trying to configure the ftp service in my server. Everything seems in place, but the client always gets this response: Connection refused. This is the content of my iptables file # Generated by ...
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1answer
1k views

Centos , /dev/root is getting full. Cannot find disk space usage [duplicate]

First of all I am not a sysadmin and so this is all new for me. Running on :CENTOS 6.4 x86_64 , Cpanel/WHM 11.36.1 (build 6) Problem : My root disk is getting full but I cannot find the files that ...
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1answer
211 views

mount -t cifs with krb5i

I am trying to mount a windows 2008 R2 share on my centos6 64 server and am getting the following message as a response to the mount: mount -t cifs //esb.local/dfs /mnt/win --verbose -o ...
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2answers
4k views

Installing CentOS 6.4 on Xen 6.0: Install hangs on “Switching to clocksource hyperv_clocksource”

When I tried to install CentOS 6.4 on a Citrix XenServer 6.0, after I hit install, the installation hangs at "Switching to clocksource hyperv_clocksource" I have installed CentOS 6.0 without this ...
2
votes
2answers
474 views

Error “Illegal instruction (core dumped)” while running Puppet agent (version 3.2.1)

I just upgraded puppet to version to 3.2.1, and when running the agent, I get an error saying "Illegal instruction (core dumped)". Here is some details: Both master and agent is run on the same ...
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1answer
344 views

Corosync with Pacemaker Resource explanation

I have the following resource: primitive WowzaMediaServer lsb:WowzaMediaServer \ op monitor interval="30s" timeout="60" \ op start interval="0" timeout="60" \ op stop ...
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1answer
115 views

install nginx on centos 6 but folders isnot working give me 404 not found

I've install Nginx on CentOS 6 without control panel following these steps. I got Nginx installed successfully, see this link. But I still have a folder that isn't showing and giving me "not found ...
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2answers
667 views

How do you remove attached FC LUNS from CentOS 6?

We have a Qlogic QLE2560 HBA running on a Centos 6 server. I am needing to remove the attached LUNS remotely. I do not have any software from qlogic installed on the device. Their are 2 LUNS ...
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1answer
517 views

How to bind two ip to one domain name for failover solution in Linux (Bind) or Windows server 2008 DNS

How to bind two ip to one domain name for fail over solution in Linux (Bind) or Windows server 2008 DNS ?
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0answers
287 views

CentOS 6.4 on Hyper-V memory exhausting issue

I am having an issue where the RAM on the virtualised machine is becoming exhausted after periods of time, the machine itself has 4GB RAM assigned to it and it always seems to be reporting around 15% ...
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3answers
187 views

Preferred way to add a new name server to a host in Red Hat or CentOS

I am managing a particular host machine, and I would like to locally add a new name server for it to query (i.e. not changing its name server settings via the dhcp server). It seems that there are ...
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1answer
40 views

How is it determined which name server will be used for a particular interface?

According to the documentation for interface configuration files in RHEL 6, an interface can specify which name server it would like to use by including the directive DNS{1,2}=address . The ...
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1answer
188 views

iptables rule to allow Nimsoft connection over internal interface

The company I host with (Softlayer) requires me to open up port ranges 48000 to 48020 for their monitoring service. From ifconfig, these are my interfaces: eth0 Link encap:Ethernet HWaddr ...
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1answer
403 views

CentOS 6.4 SSSD + GDM problems

I'm having an issue where using SSSD it will not bring up a full desktop when using GDM. It seems to get to where it appears to be loading the desktop, then X crashes/stops then reloads GDM. If i ...
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1answer
313 views

Problems with ImageMagick 6.8.5 on CentOS 6.3

I installed ImageMagick from source per their instructions since they didn't have a matching version for our OS. http://www.imagemagick.org/script/install-source.php However, I ran make check and ...
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0answers
224 views

How to solve a long “Wait” time, on a dedicated server of a pretty large website

Thanks for reading this. We got an issue with our web server, we have a rather large website, with 500-800 concurrent users at any time, we use a dedicated server to host it, we use prefork to ...
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1answer
622 views

Resize/extend partition size CentOS

Im tasked to resize a partition on a remote server. I've read up on it and understand that i'll need unmount and use resize2fs /dev/sdato expand the partition size. Can someone please help me unmount ...
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0answers
93 views

tomcat treats my JSF2 application as HTML

I have a JSF2 application I can access my application @ http://tvmteleshopping.com/faces/ui/manageProfile.xhtml But when i use http://tvmteleshopping.com/ui/manageProfile.xhtml (without /faces/ ) ...
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1answer
2k views

vnc-server not installed on CentOS 6.4

while following this Guide , i did this: yum install vnc-server and it installed success fully , but rpm -q vnc-server returns package vnc-server is not installed while yum install ...
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2answers
367 views

Name Servers not resolving

I just got myself an unmanaged Dedicated VPS from OVH and I don't have a prior experience of setting up servers or DNS servers but I followed a couple of tuts and installed webmin and created NS Zones ...
1
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1answer
118 views

Self compiled Perl package Centos [duplicate]

I have a Centos 6 server.. I have compiled Perl 5.16 in it (in a non-standard location). Now when I try to install Some package which is dependent on Perl using yum.. Yum tries to install Perl ...
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3answers
795 views

How to mount ceph-fuse automatically with fstab?

# ceph -v ceph version 0.56.3 (6eb7e15a4783b122e9b0c85ea9ba064145958aa5) # repoquery -i ceph Name : ceph Version : 0.56.3 Release : 1.el6 Architecture: x86_64 Size : 26734691 ...
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2answers
227 views

Is subscription-manager available for CentOS?

I'm trying to fix my updater to point to a specific release. Is the subscription-manager for RedHat only? I don't see it in my CentOS 6.3 (yum) repository.
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2answers
297 views

Troubleshooting SUDO Slowness with STRACE

I'm having trouble with sudo on some systems. It is taking anywhere from 15-30 seconds to complete a sudo command or to even login to the system. I ran an strace and can see where the delay is ...
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3answers
66 views

Root access issue from localhost [closed]

I have a strange root access issue - I'm able to login as root via SSH but I'm not able login to the physical machine via terminal. Some more info: - running CentOS 6.4 - password authentication ...
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1answer
211 views

expand the size of EBS volume in EC2 of AWS (Centos 6.3)

I have a Linux Centos instance with the following volume partitions: / - 5 GB /logs - /2 GB /data - 4 TB (4 volumes, each 1 TB). I would like to add more disk space (3 TB = 3 X 1TB volume) to my ...
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3answers
1k views

chkconfig equivalent for upstart jobs on CentOS6

On RHEL6/CentOS6 what is the upstart way to: chkconfig add my-svc chkconfig my-svc on Explanation: I have written an /etc/init/xvc0.conf job. I can do start xvc0 on the CLI, but after reboot ...
2
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1answer
170 views

1024 connection limit on a single port

I'm running a shoutcast v1 streaming server on a CentOS box. When I start the server as root, I can stream to 1200-1300 clients without a problem. However, when I run the server as a different user ...
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0answers
239 views

Tomcat 5.5.HTTP 404, the requested resource is not available, NFSv4 mount

I am getting the HTTP 404, requested resource is not available. I do not know how to tackle this issue. Let me give you a brief overview of the environment. I have a system running on CentOS 6.4, ...
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2answers
2k views

Selinux in permissive mode, ssh key based auth and locked account

I noticed something weird regarding ssh key based login and selinux in permissive mode. Let me introduce you the setup: The server is an updated Centos 6.4 x86_64. We create user without a password ...
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1answer
178 views

yum and rpm nothing happens

I am experiencing an odd problem in CentOS 6. when I try to use yum or rpm nothing happens. For example if I type yum update it simply returns to the command prompt. I have checked that yum and ...
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2answers
666 views

Determine php script causing MySQL huge load

I'm running a young non-profit organization aiming at providing free and low cost web hosting. Since few days, our server load is around 1.5, sometimes raising to 7. top shows me that MySQL is the ...
2
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0answers
306 views

IPSec + L2TP + NAT-Traversal does not work for multiple clients behind same nat

I have recently configured a VPN server hosted in AWS EC2. Details: Centos 6.4, openswan, xl2tpd, NAT-traversal. The configuration works great for a scenario when only one user connects form a given ...
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4answers
127 views

Good pratices to update servers? [closed]

I have many servers running CentOS 5.* and CentOS 6.*, I would like to update them, but there's some applications running and I might crash these applications, which led me to write this post with ...
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1answer
71 views

Centos install in Xen problems

I'm running ubuntu 12.04.1, and I want to install CentOS 5 or 6 using network installation via http. Using xen images from http://mirror.centos.org/centos/5.7/os/x86_64/images/xen/ my config: ...
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1answer
77 views

Whats wrong with my iptables?

Problem I cannot get requests to my server on port 80 to redirect to my client on port 8080 Server I am using a CentOS 6.3 VM as the server, the client is an Arduino Server eth0 - 172.16.145.139 ...
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0answers
23 views

Interface eth0 not reacheble outside LAN

First of all, sorry for my bad english. I configured my two interfaces, eth0 and eth1! Bove have the LAN IP 192.168.0.10 and 192.168.0.11.... everything ok. The problem is, eth0 is reacheble from ...
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1answer
2k views

how to change from DHCP to STATIC ip on centos 6 [closed]

I have been trying for months on how to change DHCP to STATIC ip successfully on Centos VM The thing is i am not sure if it is because i am using a virtual machine or if the host bridge network is ...
2
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2answers
8k views

How downgrade PHP 5.5 to 5.4 or 5.3 on centos6

I have server running centos 6, i recently upgraded the php on the server to version 5.5 and noticed that some of the scripts in laravel framework i use are breaking. i get this error Parse error: ...
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2answers
4k views

Percona MySQL unable to start - ERROR! The server quit without updating PID file

BACKGROUND: I installed Percona Server on a fresh Centos 6.4 minimal. Prior to this, I have never installed MySQL (though I'm not sure if Centos 6.4 minimal came with MySQL?) Anyway, here are the ...
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0answers
337 views

Centos installation: Anaconda died after receiving signal 7

I want to install CentOS 6, 64-bit on my PC. I'm getting following error in the first stages of installation (right after media check and before starting graphical installation): Anaconda died after ...