CentOS is a free (as in beer and speech) GNU/Linux distribution that is community driven and based on source code released from RedHat.

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Centos client authenticate against zentyal DC via ldap

I have a bit of a problem. 3 months ago we deployed a zentyal dc on my workplace because it was a good way of authenticating both windows, linux and mac against the same server. I got authentication ...
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65 views

Apache2 “RequireAny Granted” not functioning properly

I have a bit of an issue that I am very stumped on. I have a webpage on a CentOS 7 server running Apache. This page is on a virtual host file so that when ever I browse to htp://servername or IP I ...
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37 views

Xen VM could not be installed

I have rented a server from Hetzner. I have installed Xen on Dom 0 - Centos 6.5. I couldn't create a Dom1 Centos 6.5 VM. The Error I see is 'Unable to retrieve 'the link for centos image' while ...
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181 views

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message I've created new partition(/dev/sda6) and mounted it(on /hulk). Edited /etc/fstab file to give quotas on the ...
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76 views

Infiniband + KVM

this question is a copy from stackoverflow, as I was told, my question would fit here better. Despite quite a long search for days, I could not find any good information about the following - though ...
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49 views

Linux: Process ignores signals

Processes running in Linux ignores signals (INT,QUIT,TERM) except KILL. Programs such as top, tail -f, sleep and etc, do not respond when pressing Ctrl+C and thus have to stop them from another ...
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188 views

Postfix + Saslauthd + Kerberos 5 + CentOS 7 not working

I've almost got saslauthd checking against Kerberos but seeing some last issues on CentOS 7. When postfix talks to saslauthd, it sends a lowercased domain and it's not corrected. I tried to fix things ...
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62 views

Possible to prevent access to /tmp for a specific user via SELinux?

I'm sort of learning the edges of SELinux and I'm wondering if it's possible to prevent a specific user from accessing /tmp. Clearly it's a bad idea to dork all permissions, so I'm hoping that ...
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104 views

Enable SDL for KVM under CentOS 7

I'm trying to set up a VM in CentOS 7 with an SDL display, but every time I try to run it, I get the following error: Error starting domain: internal error: process exited while connecting to ...
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114 views

CentOS - Files to Copy to get Consistent MIME-type detection in PHP

I have the same website (written in PHP) running on two servers. I've tried uploading the same exact file to both servers through the website. On one of the servers, the file's mimetype is detected as ...
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140 views

Naming convention for /var/lock/subsys on sysvinit with multiple pids

In this Tips and Tricks article from Red Hat, it is said: When a service is started through an init script, a file is touched in the /var/lock/subsys/ directory with the same name as the init ...
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156 views

Using my IPs on OVH server via GRE

I can't route my IPs into a OVH server, can you help me to find the problem? Mikrotik GRE IP: 192.168.55.10 OVH Server GRE IP: 192.168.55.20 GRE iface name: ali1_fr1-ovz1 IP to route from Mikrotik to ...
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290 views

Weird Phusion+nginx spawning delay error

We are trying to migrate an application written on REE from cloud provider A to cloud provider B. The application code, VM specs and operating systems are the same. The basic difference is that cloud ...
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238 views

lxc command always “get error 4 in libc-2.12.so”

I've tried several time to find out why suddenly my LXC not working, I use dmesg | tail it shows: lxc-start[2777]: segfault at fffffffffffffffc ip 000000390347b82c sp 00007fffd9046c18 error 4 in ...
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53 views

Virtuall Manager : CentOS Guest Install Garbled Text

I'm trying to install CentOS 6.5 with virtual manager but the menu is garbled. Host machine is running on Debian Wheezy. Thank you in advance.
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323 views

Directory index full, is this fsck result OK?

I found these in my /var/log/messages: kernel: EXT4-fs warning (device md2): ext4_dx_add_entry: Directory index full! kernel: EXT4-fs warning (device md2): ext4_dx_add_entry: Directory index full! ...
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140 views

Investigate strange message from syslog@stock

I've noticed that when I'm logged into my server I sometimes get spammed a message from syslog@stock. On this server I am running a website built with Laravel and a Teamspeak 3 server running with ...
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159 views

Nagios 3.5 can't send notification email despite nagios logs ok / centos6

I spent hours trying to make nagios send email notification. my contact configuration is quite simple : I juste have one : nagiosadmin, and he is the default contact. In /var/log/nagios.log, nagios ...
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121 views

FreePBX server (cent OS base) locks up with no errors or kernel panics

Bit of a baffling situation I've been dealing with for a few days. I have multiple CentOS headless servers (6.4) with the following stats: Core CentOS - 6.4 (Final) Kernel - ...
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90 views

connect database with sequel pro

I have install lamp centos on linode, I can use ssh login on terminal app, How to use sequel pro connect to my host database? in sequel pro I input below content but it not work Name: project MySQL ...
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161 views

Selenium in virtual machine is slower than desktop

I've set up a kvm virtual machine, CentOS 6 on both guest and host. I'm using selenium on the guest in order to test a web site. However, it loads significantly slower than trying to hit the web site ...
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44 views

Odd behaviour with varnishlog and stream redirecting

I wrote a helper to debug varnish installation and have used it on both production and development server. The odd thing is, I encountered different behaviour even though the setup is nearly identical ...
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207 views

Need help recovering CentOS system

My CentOS 6.5 system was getting errors about the hard disk so I used partclone to clone the root filesystem. Just 2 days later the hard disk died and the system would no longer boot. So I replaced ...
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392 views

Adding custom package in Centos 6 DVD/CD

I am trying to include my custom build package in the CentOS installer DVD/CD. I am able to respine the DVD with my Kickstart file. The automated kickstart installation works fine, however, when I ...
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315 views

Improving TCP performance over a gigabit network lots of connections and high traffic for storage and streaming services

I have two servers, Both servers hardware Specification are Processor : Dual Processor RAM : over 128 G.B Hard disk : SSD Hard disk Outging Traffic bandwidth : 3 Gbps network cards speed : 10 Gbps ...
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88 views

Stuck GhostScript processes, how to debug?

Having a problem with Ghostscript processes that don't end. This does not happen often, probably once every 3 weeks we see this issue with 1-3 processes. Running CentOS 6.4 on a VPS from Rackspace. We ...
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1k views

ntp is not syncing on centos server but gets response from remote server

I have googled for days before asking and I feel like I have tried everything but ntp is still not updating the time of the system automatically. I have left it running for days and still I get the ...
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43 views

RabbitMQ server randomly, mysteriously stopping

I installed RabbitMQ on my EC2 box following the RPM install instructions from their website. My OS is CentOS. Every now and then, the rabbitMQ server just stops running, nothing shows up in the ...
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49 views

Poor large transfers behind NAT on Centos

I have the following set up. A Centos 6.5 VM running on an ESX host, with a public IP4 address. It is acting as a gateway for (a bunch of) other Centos 6.5 VMs that are only connected to a virtual ...
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118 views

Transfer user data of a Tigase server

I'm trying to transfer a Tigase XMPP server from an Ubuntu VPS to a CentOS VPS. Unfortunately there isn't any official documentation available and I need to experiment in order to preserve all of the ...
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287 views

How to configure nDPI for iptables

I am new to nDPI, I have installed nDPI but when I add rules like; iptables -I OUTPUT -m ndpi --http -j REJECT it shows error iptables v1.4.7: Couldn't load match ...
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59 views

Multiple DDOS protection interfaces merging on one TS server

The problem I have is I have 3 DDOS protection interfaces from a multi homed DDOS protection solution and teamspeak is refusing to return packets via the correct interface (aka the one that sent it ...
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51 views

Strange glitch with NIS

Good day. One of the network users with the NIS account (yp and automount) has some problems: after editing network service configufation file (/etc/sysconfig/network) and rebooting ...
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2k views

Centos - .htaccess file not working

I have just setup a new server with Centos 6 added a virtual site then tried to add an .htaccess file to run PHP in .html extensions (copied from another working setup) but the command is being ...
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50 views

How to write a file from Apache CGI in a user home directory on CentOS

I made a CGI in Python and it works unless I try to write to a file in a user's home. I activated allow_httpd_anon_write and allow_http_sys_script_anon_write to true with graphical tool for ...
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153 views

Need help recovering RAID 6 array

My CentOS 6.5 server had its primary drive fail the other day. Our hosting company replaced the primary drive and reinstalled the OS. The system is up and running, but the 15TB of RAID6 storage isn't ...
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266 views

Linux TACACS+ auth for SSH but allow users to use public key auth

we have running tacacs environment for centralised login to our routers, firewalls etc and even most of our linux boxes to ssh what we would like to do is allow users to authenticate to SSH via ...
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107 views

Lost web permission after upgrading CentOS from 5.6 to 5.10

I upgraded CentOS from 5.6 to 5.10 using the following simple commands while logged in as root: yum update yum upgrade Now, I can no longer access web pages. All requests, regardless of type of ...
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54 views

Limit size using Quota per file for a user

I am working on a linux machine . i have a user name dave. i want to implement quota on /home/dave . that dave could not create more than 2 MB file in this main directory. user can create any sub ...
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65 views

How to use kexec to do a live upgrade of hotswap ram on a CentOS vm image?

Just as the question states, is there a way and what's the best method todo a live ram upgrade with kexec?
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767 views

SMB Share (samba) Centos 6 Mounted hard drive Permission Denied

I have set up a SMB share on Centos for all users. This share is available and working correctly. Guide followed -> CentOS 6.4 Samba Standalone Server With tdbsam Backend Procedure: For diagnostic ...
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388 views

mysql binlog error “ERROR: Error in Log_event::read_log_event(): 'Found invalid event in binary log', data_len: 341, event_type: 2 **”

I am new in mysql binary log and replication .Please help me sort this issue. I am using mysql version 5.0.95 and now facing errors in binlogs. Some of querries in binary log as unknown event and ...
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571 views

Getting errors from local CPAN configuration on server with no internet

I've been wrestling with getting a local CPAN installed and configured on a CentOS server with no internet access. What I've done so far is this: 1) Made a full rsync of a CPAN directory onto an ...
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102 views

Settings for php to solve empty session?

I have my php running on Centos 6.5 (Final). I have problem where one of my potential customer who is sitting remotely having upon login and redirect the sessions gets empty.He even tried on other ...
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571 views

CentOS 6.5 Xen Virtual Machine Issue 'this function is not supported by the connection driver'

I am trying to segment my system into a number of virtual machines but just cant seem to get this to work. I think I am close but not quite there. I have install xen, virsh, xl etc and I am using ...
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75 views

incoming mail with low score, but count as spam?

my Centos server currently running spamassassin to filter spam email, it work together with mailscanner, it work fine before but suddently got a problem: Nov 15 16:12:02 main MailScanner[4079]: ...
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375 views

postfix opendkim DKIM-Signature and Domainkey-Signature

Running postfix on CentOS 6 as an edge relay for a while now, so all our outgoing mail is routed through one point with opendkim signing the mail. This works great. I was originally using ...
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229 views

samba “username map” stopped to work after upgrade to 3.6

It was time to upgrade our group server (new HDs, problems with old installation of DRBD, etc..). Going as usually for CentOS i upgraded whole system from 6.3 to 6.4 The later one came with samba 3.6 ...
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664 views

dhcping “no answer” on CentOS 6.4

I installed a DHCP server (yum install dhcp) and this is my conf: # create new # specify domain name option domain-name "mydomain.name"; # specify DNS's hostname or IP address option ...
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48 views

CentOS time jumps every microsecond

It's a very strange thing. If I run this shell script on the server CentOS 5 (32 bits). time.sh #!/bin/bash for i in {1..10} do NOW=$(date +"%M:%S") echo "$i $NOW" done ...