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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MailX sending all mails to spam folder

I followed the setup as instructed in this link: https://www.digitalocean.com/community/articles/how-to-install-postfix-on-centos-6 I successfully installed everything and mail is being sent via ...
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96 views

Apache sitemap generator to generate more than 150K URLs & daily 2K URLs

I have a big WordPress installation more than 150K post about 2K daily posts 3 months ago i used Google Sitemap Generator but unfortunatley it is not working with CENTOS 6 It is really very good ...
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2answers
881 views

Downgrade PHP 5.5 to 5.4 (CentOS REMI Repo)

I have installed a LEMP stack by following this guide http://www.if-not-true-then-false.com/2011/install-nginx-php-fpm-on-fedora-centos-red-hat-rhel/ I now have the latest version of PHP v5.5. I then ...
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1answer
438 views

why does yum update fail in cent os 6.4 when wget and curl succeeds

I am using Cent OS 6.4 in a corporate lab and the yum update fails with the below error: I am able to access the same repositories through browser. [root@LAB1 ~]# yum update Loaded plugins: ...
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1answer
111 views

How to purge strange files in lost+found

somehow i did end ip with a 'lot' of corrupted files in lost+found directory (centos) and I can't get rid of them. Any idea ? [/lost+found]# ls -la total 196 drwx------ 5 root root ...
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1answer
447 views

qt47-webkit-devel installation conflicts?

I'm receiving several conflicts while trying to install qt47-webkit-devel on a CentOS 6.4 server, the meat of the conflicts is here: --> Processing Conflict: 1:qt47-x11-4.7.2-1_18.el6.x86_64 ...
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2answers
53 views

Will upgrading to PHP 5.3 on CentOS 6.4 cause any problems

I intend to upgrade PHP from version 5.2.17 to 5.3 or higher on a CentOS 6.4 64-bit. I'm also running cPanel on the server. My question is, will it affect any other part of the server that I didn't ...
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2answers
1k views

OpenVPN SELinux Permission Denied

I am running CentOS 6.4. # cat /etc/centos-release CentOS release 6.4 (Final) After some updates, and a reboot, OpenVPN fails to start. # service openvpn start Starting openvpn: ...
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2answers
2k views

mysql: unrecognized service … but mysql is installed and it's working

I'm trying to stop mysql and do some changes , then i'm going to start it again I'm using a SSH client . So i ran this 3 commends without any problem mysql mysql> SET GLOBAL ...
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1answer
275 views

I added some options to stop spam with Postfix, but now won't send email to remote domains

I had a working Postfix server, but added a few lines to my main.cf in a hope to block some common spam. Those lines I added were: smtpd_helo_required = yes smtpd_recipient_restrictions = ...
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3answers
751 views

How to access web page on a server using the IP 10.0.0.3?

I have three internal servers that will never have any connection to the internet. I've had to build a local yum repo to set them up with tools like bugzilla and the like. However, all three are ...
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1answer
119 views

rsync around a VPN connection on CentOS 6.4

I'm trying to rsync outside of a VPN connection. I have a CentOS 6.4 machine that has an open VPN connection, that capable of roughly 10Mbps, whereas the WAN connection is 40Mbps. I'm trying to rsync ...
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1answer
956 views

CentOS 6.4 x64 iRedMail SMTP Error: (451): Failed to add recipient

been managing my own servers for a bit now, but new to mailservers in general. I have gotten iRedMail installed on my box (CentOS 6.4 x64), but I'm getting an error when it comes to actually sending ...
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1answer
460 views

SElinux process killed while trying to set boolean

I've got a strange problem. I can not allow apache to connect to database at my CentOC 6.4 box: [root@centos6 ~]# setsebool -P httpd_can_network_connect on Killed [root@centos6 ~]# sestatus -b | grep ...
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1answer
1k views

Apache misbehaving (returning 404s)

CentOS 6.4 64-bit Apache 2.4.6 PHP-FPM 5.5.4 Homepage from root loads fine http://csillamvilag.com But all other pages return 404 (CMS is WordPress). I am also able to access and log into WordPress ...
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1answer
53 views

Apache Virtual host (SSL) Doc Root issue

I am having issues with the SSL document root of my vhosts configuration. Http sees to work fine and navigates to the root directory and publishes the page fine - DocumentRoot ...
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1answer
1k views

CentOS 6 LEMP update - dependency error issue

I have setup a LEMP server following the guide Install Nginx/PHP-FPM on Fedora 20/19, CentOS/RHEL 6.5/5.10. It's been a while since I did the setup, so I wanted to grab the latest updates from REMI ...
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1answer
3k views

Howto enable SMPTS (465) postfix CentOS

I need help is enabling SMTPS. I use postfix , dovecot with MySQL(virtual domains). I do not know how to enable SMTPS(465). I already added tls related settings and key and certificate in the ...
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1answer
659 views

Centos does not open port/s after the rule/s are appended

So after some battling and struggling with the firewall, i see that I may be doing something or the firewall isnt responding correctly there is has a port filter that is blocking certain ports. by ...
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0answers
131 views

google site map generator can't login admin console

I installed Google Sitemap Generator for linux x86_64 CentOS 6 But when I try to login to the admin console using this link myserverip:8181 and my password nothing happened. After refreshing I ...
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0answers
360 views

How to troubleshoot occasional Apache 500 errors?

I have GET and POST requests, both HTTP 1.0 and 1.1, to diverse URLs, mostly running Wordpress(1), which occasionally fail with a 500(2). No user has ever encountered a 500 themselves, nor have ...
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1answer
585 views

rsyslog forward all except ldap

I have Centos 6 servers running openLDAP. In the rsyslog.conf, I forward the logs to my central server with this line: *.* @10.10.10.10:514 openldap seems incredibly chatty. I have 3 servers in ...
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1answer
429 views

Installing qmail on Linux CentOS 6 (switching from sendmail to qmail service)

I'm following Tom Clegg's guide on how to install qmail on Linux (the best I can anyhow) and in the section of his guide headlines 'Switching mail service from sendmail to qmail', I'm unfamiliar with ...
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1answer
298 views

MySQL Creating a Database CentOS (6 - 64bit) Error 1064 (42000)

When ever I type in : GRANT ALL PRIVILEGES minecraft.* TO 'minecraftu'@'%' IDENTIFIED BY '********'; It gives me an error of : ERROR 1064 (42000): You have an error in your SQL syntax; check the ...
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1answer
58 views

Adding and Removing MySQL Databases via CentOS 6 - 64 bit

I have a VPS, and am having troubles with MySQL. I think I have created a database, but got lost. I need to know how to: Add a database, with the username, name of the database, and password. ...
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1answer
35 views

Unable to browse to apache service, Service is running

Summary I have a very peculiar problem. I am not able to open the "It Works!" page after installing a fresh server with apache. I am able to ssh to the box (from outside the network). Apache seems to ...
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0answers
714 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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1answer
1k views

Putty: Incoming Packet was garbled on decryption

I am unable to connect to my server on my local network (VM). I have multiple servers I am able to connect to. When I try to putty into the server, I get the message Incoming Packet was garbled on ...
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3answers
638 views

Forward secrecy in Nginx (CentOS6)

I am trying to enable Forward secrecy in CentOS with nginx webserver. What I have tried I have read some tutorials and seems like we should have nginx, openssl latest versions to enable it. So I had ...
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1answer
2k views

Can't mount home after trying to resize (bad geometry: block count exceeds size of device).

This is on a fresh computer (super computer actually). It got to me with 15T on the home mount and 50G on the root. I tried allocating 7T to root and resizing (since I'm putting a local yum repo on ...
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1answer
2k views

Input/output error reading USB backup drive on CentOS 6.4

I'm suddenly seeing some strange behaviour on our USB backup drive that doesn't make sense to me: (2013-10-21 14:58:23 [root@newdc /]$ cd /mnt/backup/ (2013-10-21 14:59:03 [root@newdc backup]$ ls -la ...
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2answers
67 views

ESXI Snapshots on a CentOS VM

On reverting back to a snapshot on one of my CentOS VM's the date is obviously set back to the original snapshot date. I was wondering if anyone knew of any other changes to the server (apart from ...
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0answers
31 views

installing php & nginx without mysql?

I'm setting up some servers on digitalocean's cloud hosting. I have mariadb installed on its own server, and I am now setting up the nginx/php server for files. Is it necessary to install ...
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1answer
507 views

Cacti Graphing not working

I've tried setting up Cacti on CentOS 6 with mariadb, nginx 1.4, php 5.4.x I just can't get the graphs to update My cacti files are all owned by user nginx, so my crontab file /etc/cron.d/cacti has ...
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2answers
9k views

How can I find current ssh protocol version of current connection?

I connect to a linux machine (centos 6.4) ussing putty. Except from fact that I can set putty to only use one type of protocol, how can I find the current's ssh connection version (SSH1 or SSH2)?
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1answer
466 views

How do I check if server really has RAID 10 enabled?

I have a dedicated server with 4 hdd and RAID 10, with Cent OS 6.4 How can I check if RAID is really enabled. I'm in doubt because on another server with RAID 10 enabled, I can see in /dev sg0 sg1 ...
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1answer
45 views

Confusing MySql Error

I am trying to install an application on CentOS, and see this error in my apache log. If any can help me understand what exactly is the case, I can try to work on a solution for the error. This is ...
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1answer
251 views

Nagios installation issue [closed]

I am using centos6.4 and i am trying to install nagios on that system, i follow these steps: 1) Download and install repo http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm 2) ...
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3answers
294 views

Any way to find what is filling up my disk? [duplicate]

This morning I was greeted with low disk warning on my root partition. So I started with usual investigation path and obviously the result of my first command become the one as shown below. ...
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2answers
124 views

How to disable/delete network manager

I'm on CentOS 6.4 64 bit in rescue mode and network manager keeps overwriting my resolv.conf and the command chkconfig is "unknown" so how do I disable/delete network manager?
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1answer
55 views

Server connections not connecting when switching to Static IP

I have a Centos 6.4 based VM, and I'm running Virtualmin on it to host my personal site. The problem is that by default, the OS is using DHCP, even though at router level (virtual router defined ...
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1answer
488 views

Socket connection timeout over vpn

I have a server running a largely default install of CentOS 6.4. It is behind a VPN and a firewall, neither of which are managed by me - they are managed by the hosting company. When I leave an ssh ...
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2answers
390 views

Relay access denied when not send from server itself

I'm setting up Postfix & Dovecot on CentOS 6. Everything works except sending mail from withing Outlook to someone else. Receiving works & sending from ssh console as well .. I've been ...
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2answers
75 views

Optimizing Apache2 for high volume of small requests

I have a Perl script which returns a string, it's very simple and small. It is running on CentOS 6.4 with mod-prefork and mod_cgi via httpd 2.2.15 over SSL. It is the directory index, so when you ...
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2answers
106 views

Move CentOS to new raid1 hardware server

I have an existed CentOS server with a normal hard disks (2 disks sda,sdb). They very small. Now I want to update server with a RAID1 hardware and new 2 bigger disks (remove 2 old disk). How can I do ...
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1answer
270 views

Unable to adjust php.ini max upload size directive on Centos 6.3

Currently i'm setting up Centos 6.3 (64 bit) on vm and installing Wordpress: Already adjust /etc/php.ini but seems like overwritten by other settings. Suspect this is due to selinux feature. My goal ...
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1answer
253 views

Installing mcrypt extension on CentOS 6

I am trying to install the mcrypt extension on my CentOS 6 VPS. I have done the EPEL rpm and then updated everything. Now, I keep getting this error and I've also installed php-api. [root@vps ~]# yum ...
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1answer
490 views

how to backup and restore mailman?

How can I backup and restore mailman list ? Our server was hacked, We plan to reload OS. We are having mailman list in server. I'm new to mailman, It's urgent to backup and restore mailman list. ...
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1answer
47 views

Fail2ban still adding to log after uninstall

I am running a CentOS6 VM and I have been playing with Fail2ban, upon removing the service from my server I can see that it appears to be still posting logs to the /var/log/maillog Here is a link a ...
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37 views

Routing issues between virtual web server and exchange server

So I've got a virtual web server running CentOS 6.3. Trying to build a mail application on a website that uses SMTP authentication on the (Windows) Exchange server but it keeps failing though the ...