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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69 views

100% usage for 11G/40G, how is it possible?

How is it possible to have the stats below: 11G used over 40G Size and no more space available. Now I cannot send my e-mail because I receive: An error occurred while sending mail. The mail server ...
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72 views

CentOS 6.5 password-less scp fails only when ssh server not running debug

I've got a very weird situation going on. I've got 3 database servers, 1 primary with 2 hot standby. These are running CentOS 6.5 and postgres 9.3.3 with WAL segment archiving so the primary needs to ...
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58 views

PostgreSQL user authentication against PAM

I am trying to set up authentication via PAM for PostgreSQL 9.3. I already managed to get this working on an Ubuntu 12.04 server, but I am unable to get this working on a Centos-6 install. The ...
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2answers
103 views

Block incoming traffic from unresolved IP address

How can I block all the incoming traffic from unresolved IP addresses? I am using CentOS with WHM/cPanel installed. I am getting huge junk traffic and 95% is from unresolved IP addresses and only 5% ...
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87 views

Samba 4 vs MS Office - Error accessing the file for saving, open and read works

Description I am struggling with a rather old (well-known) issue using the latest samba 4 suite. The MS Office 2010 products refuse to save a new (or modified) file on the samba share and display a ...
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104 views

Sendmail Failing to Forward Locally Addressed Mail to Exchange Server

When a customer places an order via our (Magento CE 1.8.1.0) website, a copy of said order is supposed to be BCC'd to our sales manager. I say supposed because this was a working feature before the ...
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2answers
326 views

How to install mcrypt in dual PHP version CentOS 6?

I have two parallel versions of PHP installed on CentOS 6.5 via this method [root@host ~]# php -i | grep "PHP Version" PHP Version => 5.3.3 [root@host ~]# /opt/rh/php54/root/usr/bin/php -i | grep ...
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37 views

Get physical drive size from command line

Is there a command that tells me whether I have 2.5 or 3.5" drives in a system?
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155 views

Server Mod_security Error “406 Not Acceptable” WHM/cPanel [1234123413]

When i try to access one of the domains from browser i get an "406 Not acceptable" error. after doing a little research i figure out is due to rule ID [1234123413]. Now my concerns are: if i ...
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1answer
81 views

ImageMagick using openJPEG 2.0 and CentOS 6.5

I'm currently working on a CentOS 6.5 server. I'm trying to use openjp2 as one of the delegates in ImageMagick. Since openjpeg for CentOS is outdated (1.3), I've installed a new one using RPM ...
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58 views

error: Bad prime description in line

Aug 17 09:34:17 vps-aadsshd[130428]: error: Bad prime description in line 186 Aug 17 09:34:17 vps-aadsshd[130428]: error: Bad prime description in line 187 Aug 17 09:34:17 vps-aadsshd[130428]: error: ...
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805 views

How to install SVN client version 1.8 on CentOS/RHEL 6?

I'm trying to install the SVN client version 1.8 on CentOS 6. I'm using the description on http://tecadmin.net/install-subversion-1-8-on-centos-rhel/ All activities are running successful without ...
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54 views

iSCSI remote boot from intel NIC working in vmware ESX, not other distro´s

The objective is to have a completely diskless Centos connected to storage via. iSCSI over a 10Gb intel X540 NIC. The ROM on the NIC is flashed as initiator and tailing the logs on the target, i can ...
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17 views

route command displays gateway backward

Very puzzling problem on CentOS 6. After I issued this command: route add -net 190.160.190.0/24 gw 191.160.203.254 I then check with the route command, but the gateway IP appears backward: ...
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1answer
230 views

Samba / smbd on Centos 6.5

I've installed Samba4 and have the smb.conf file as follows: [global] workgroup = WORKGROUP server string = Samba Server realm = REXIALO.COM netbios name = ...
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1answer
94 views

MySQL stops running without reason in log file

I am running MySQL 5.6.17 on Centos 6.5 (2.6.32-042stab090.5 #1 SMP Sat Jun 21 00:15:09 MSK 2014 x86_64 x86_64 x86_64 GNU/Linux). Every couple of weeks MySQL stops running, the logs do not show ...
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2answers
75 views

Migrating Hyper-V VM's to CentOS 6

I have tried to search this around in google, but I haven't actually found anyone migrating from Hyper-V (Windows) to CentOS 6, only the other way around. So, I was wondering if there are any pointers ...
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50 views

xtable geoip filter unable to load into memroy

Ok, I have a odd problem. I just got done doing the bas configuring of my server. Adding in fail2ban, postfix, apache, mysql, ect ect. I then went in and started to add the xtable addons. I ...
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2answers
66 views

How can I scan a IP & Port range to get information about all SSL certificates in use

From a Linux system, for a given IP range I need to check each open port to see if an SSL certificate is in use. For example, I would like to check ports 1 - 9999 on the address range ...
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2answers
408 views

Use postfix and spamassassin packages on CentOS 6 to reject SPAM - without custom users and scripts

Here is what I'm trying at my CentOS 6.5 Linux server: Installed postfix and spamassassin packages Configured Postfix - it works well (I omit details here) Added -x to the SPAMDOPTIONS in ...
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1answer
40 views

What are (if any) possible scenario whereby hacker can find multiple sites hosted in one VPS?

Let me clarify: Say that I have 10 sites hosted in one VPS host. And for some reason, one of these sites gets famous and a hacker wants to know where it is hosted, and how many other sites are hosted ...
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1answer
104 views

Is the Datadog install script safe to run? [closed]

I have a production server (CentOS 6, Apache, Nginx, MySQL, PHP, wordpress). I want to see some metrics (e.g., load bandwidth, RAM, CPU and so on). I chose a Datadog for this task. The instructions ...
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1answer
43 views

Backup without the help of softwares [closed]

I am quite new to VPS, although I have become comfortable setting up Nginx, PHP-FPM, MySql, git and other tools in CentOs, plus do some basic security and A Lot! optimization drills, all through shell ...
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1answer
144 views

Linux server apache httpd processes take i/o wait to close to 100% and lock down server

For about 5 days now, and seemingly out of the blue, my linux server has started locking up from time to time. The pattern is always the same as far as I can tell from top and iotop commands around ...
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48 views

How do I fix the require for python(abi) when building python module RPMs for SCL?

I'm currently trying to set up an environment for one of our apps on CentOS 6 using the SCL python33 repository. The app also requires a number of additional python modules, such as numpy, so I'm ...
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1answer
40 views

Connect to soap service via proxy on different ports

I need to connect from a server to a web-service server to consume a SOAP service but due to restrictions in place I cannot connect directly. They did however give me a proxy server that can, but it ...
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1answer
96 views

CentOS 100% full disk, but no there any large file [closed]

In my CentOS server, hard disk is full but no there any large file in hard disk. I check files size with du command When i reboot the server problem is solve but after 1 or 2 days this problem happens ...
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20 views

My lo interface is down on boot. What can I do?

My lo interface is down when the system boot. I can turn it up with ifconfig up lo but I wonder what could be the cause? Where can I look to debug such problem?
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196 views

Set JAVA_HOME is not working

I'm trying to set JAVA_HOME in CentOS 6.5 by editing the file ~/.bash_profile and adding this line at end: PATH=$PATH:$HOME/bin export PATH export ...
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25 views

“Killed” Python script won't start

I'm trying to start a python script. When I execute it, it just says "Killed" It normally starts because it's a cronjob but it didn't and I tried to start it manually by typing python /myscript.py ...
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1answer
208 views

Unable to re-enable SELinux

Up until now we have disabled SELinux as our Standard Operating Procedure -- before you tell me off, I know. That's why we're enabling it now we've got time to. Our normal procedure was to: Set ...
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51 views

Dedicated Server and SolusVM with Xen

I have just setup a new SolusVM Xen Node at my DC. The server is colocated there, it's owned by me. It was in Florida working perfectly as an OpenVZ node two days before. It was taken offline and sent ...
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147 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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27 views

Issue with Network IP Binding

Trying to bind a /29 (my possession, not the ISP or data center). It's routed at my core switch fine. interface Vlan70 description SERVER070 ip address xxx.xxx.42.45 255.255.255.248 Content of: ...
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34 views

Nginx does not have access to centos path

Sorry for the rather confusing title, I am trying to understand this error. I have a php file, inside a folder like site.com/src/app/index.php and this site.com folder is placed in /var/www/html/ in ...
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1answer
141 views

How to get mod_proxy_fcgi on CentOS/Red Hat 6 with Apache 2.2?

I am trying to get Apache 2.2 + php-fpm to work on CentOS 6.5 (and Red Hat later). I want to use mod_proxy_fcgi to do this, but I can't find a proper way to get it. I tried looking for repository ...
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90 views

Remove pgdg-centos92-9.2-6.noarch.rpm or enable for install PostgreSQL in CentOS 6.5

I'm trying to install PostgreSQL 9.2.6 in CentOS 6.5 and I doing as follow: Install PostgreSQL 9.2 repository rpm -Uvh ...
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14 views

<Directory /> doesn't (always) apply its settings to NFS-mounted home directories

Two different machines, a production and a test machine, are running CentOS 6, with the CentOS Apache package installed, and both version 2.2.15. The configuration on the test machine is an exact ...
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64 views

ServerSignature in Apache

I'm installing apache on CentOS 6.5 and trying to setup some hardening. Part of this process is removing the server signature with the ServerSignature directive. Since I'd like this to survive version ...
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28 views

What is the relationship between iproute2 and distro config files?

For various ip manipulation activities, what is the difference/relationship between iproute2 and modifying the distro's config files? For instance, some sources recommend ip address del for deleting ...
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77 views

Iptables unable to allow ssh through second interface

I am having an issue where as I am unable to get SSH outgoing connections to be preformed with my current firewall rules from my second interface (eth2). The machine I am trying to connect from has ...
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213 views

Strange requests with wrong server_name and port 25 in apache / php

If I try to telnet [myserver.mydomain.com] 25 I get Trying [ip number]... telnet: Unable to connect to remote host: Connection refused but still I get strange requests such as the following ...
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1answer
38 views

httpd config for ip based virtual host

can i use an ip address for ServerName in virtualhost? i have setup one similar but it is not resolving to site [I do not have a domain] <VirtualHost 180.170.180.244> ServerAdmin ...
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1answer
310 views

Device eth0 does not seem to be present on new kernel with virtualization modules loaded/compiled on kernel 3.15.6

cat /etc/udev/rules.d/70-persistent-net.rules SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:15:5D:02:14:22", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" ...
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250 views

CentOS 6.4 root account inaccesible via tty login or remote ssh [closed]

I was doing some maintenance on my web server (via root account over ssh) after several months of disuse. I shut it down yesterday and today, after startup I can't log in to root account at tty or via ...
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1answer
235 views

Hyper-v Virtual Network Switch Configuration

I have Hyper-v Running. What I am trying to do is setup a CentOS firewall box which will forward all traffic to the 2nd VM CentOS box which has an internal adapter and only seen by the 1st VM ...
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1answer
44 views

Correct setup of virtual hosts on Apache?

I have a problem figuring out the correct configuration for Apache2 virtual hosts on Centos6 server. I have a clean Centos6 installation with apache2 (httpd) installed, and by default there is ...
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442 views

Varnish won't start as service but works fine from command line?

We're trying to setup a varnish on a Cent OS 6.5 64 but can't get it working as a service. What could be the reason for the following error? [root@server]# service varnish start Starting Varnish ...
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1answer
70 views

Tomcat7 Setup - CentOS 6.3

I have tomcat7 packages installed as follows [root@mongos lib]# yum list installed | grep tomcat7 tomcat7.noarch 7.0.39-1.jpp6 @eng-support-jpackage ...
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258 views

How do I Control the Ordering of Network Interfaces?

I'm attempting to configure a machine with 3 NICs, the first two are built-in GbE controllers, the third is a 10GbE controller. Via NetworkManager, I've configured the 'first' GbE NIC (which at the ...