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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Logical Volume (lv) OVH (centos)

I'm trying to use KVM, I need to create a logical volume group to be able to do that. What I've tried for the past hour (been trying for at least 6 hours) `[root@gamma ~]# pvcreate /dev/sdb ...
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1answer
18 views

cannot get Spamassassin to run on Centos 6

I've installed SpamAssassin twice, once using yum install spamassassin and once downloading the source from cpan. SpamAssassin, itself runs and reports itself as v3.4.1 running on Perl 5.22.0 but ...
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1answer
23 views

Crond is running twice with CentOS

I have the following issue that all of my cronjobs are running twice. When I do: ps aux | grep cron I see the following: root 1379 0.0 0.1 117296 1224 ? Ss Aug26 0:00 crond ...
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1answer
29 views

Virtualbox host only + NAT network slow

I have a Virtualbox CentOS 6.6 machine. It takes a very long amount of time to ssh (like 80 seconds), but once I log in it is not as slow. I also notice when pinging something like google.com from the ...
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1answer
40 views

Centos 6.6 : Which java is selected when I run a JAR/WAR file without using java -jar command? [on hold]

On a Centos 6.6 server, how can I choose which java should be selected when I run an executable JAR or WAR file without using the "java -jar" command. I mean, I'd like to execute it with a ...
2
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1answer
38 views

Server not sending ICMP echo reply

I'm having a weird problem with a CentOS 6.6 machine. It is a server running KVM and a few guest VMs using a bridge interface. Basically, my issue is this: The VMs on this host have no network ...
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16 views

CSF+LFD not blocking brute force on xmlrpc.php on Wordpress site

I have just installed csf+lfd on my rackspace cloud server (a vanilla LAMP stack running centos 6.7). I only tweaked a couple of settings in the default csf.conf file: the ports allowed in TCP_IN and ...
1
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1answer
26 views

Nagios/NSCA: Command file '/var/nagios/rw/nagios.cmd' does not exist

I installed nagios on Centos and I also want to enable NSCA on the host. The client is already configured and is sending data (I can see it when I tail the logs). However, I'm seeing the following ...
2
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1answer
105 views

How do I schedule a recurring reboot in CentOS 6.7?

I've run crontab -e and added this line to crontab to reboot my machine every morning at 1am. 0 1 * * * root /sbin/shutdown -r now When crond runs I see this in my logs Aug 20 01:00:01 stc-logs ...
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1answer
39 views

Unable to install foreman-installer on CentOS 6.6, what could be the reason?

I'm trying to install Puppet 3.x using Foreman-installer. I've following this guide after doing the following steps: Installed a clean installation of CentOS 6.6. Added foreman and puppet repos. ...
2
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1answer
38 views

x2go passphrase prompt then authentication fail

Have read following post and although it had a similar title it wasn't the same problem: Able to connect by SSH, but not x2go From windows 7 client and windows 10 client at home to centOS6.7 remote ...
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29 views

nginx with perl fastcgi-wrapper not working after reboot

I am configuring perl/CGI with Nginx on CGI shopping cart site. (I have other sites on different directory, php-fpm running on socket. ) My goal is to successfully set up perl-fastcgi running on ...
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1answer
21 views

Yum on CentOS 6 upgrading hundreds of packages? [duplicate]

I do yum updates very frequently, almost daily. I was doing a normal yum update just now and I am being asked to update a large number of packages: Install 12 Package(s) Upgrade 315 ...
0
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1answer
30 views

Slow CentOS6 Server - No Resource Over usage - ping unable to resolve domain.com

I have this dedicated server with CentOS 6, WHM. Server is responding extremely slow. Resource usage less than 10%. While trying to troubleshoot, i found that i can not using ping command here is ...
19
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2answers
3k views

Should I be worried that yum update suddenly wants to update well over 100 packages on my CentOS 6 system?

I get an email alert whenever there's something to update, and typically do them that day. This tends to happen most days. For whatever reason I've had no alerts since 20th July until today (I ...
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0answers
13 views

Why is Postfix throwing “malformed response” and “bad command startup” errors when I send mail? [duplicate]

Why is Postfix throwing "malformed response" and "bad command startup" errors when I send mail? When sending an email from my server like: mail -s testing email@example.tld this is a test EOT I ...
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1answer
34 views

Apache tomcat works temporary - restart iptables for work

I have an apache tomcat installed on CentOS linux on a VPS. I have opened port 8080 in iptables so that it will be visit-able from outside. My problem is that when I go to address example.com:8080 it ...
0
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1answer
21 views

ip6tables forward chain filters all ports

Trying the following on a centos 6 node (running openvz kernel) ip6tables -F ip6tables -X ip6tables -P FORWARD DROP ip6tables -A FORWARD -p tcp -m multiport --dports 21,22,80,443 -j ACCEPT ip6tables ...
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36 views

Centos 6.4 ignoring static ip address, getting dhcp address?

I have a Centos 6.4 server, which has been running at the same ip address for over a year. Today the server was rebooted, despite being setup to have a static ip, it used an ip from the dhcp server. ...
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1answer
19 views

What are the configuration differences between Apache (httpd-2.2.3-22.el5.centos) in CentOS 5 vs Apache (httpd-2.2.15-39.el6) in CentOS 6?

I understand that the later version addresses security vulnerabilities: http://httpd.apache.org/security/vulnerabilities_22.html Supposedly, http://httpd.apache.org/download.html has a full list of ...
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2answers
263 views

Linux: How to find who issued a specific command while using root account?

There's a Linux CentOS 6.5 server in my company which many employees have access to. More than that, even though it's a known bad-practice, some people are working on the server using root account. ...
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53 views

Installing Redis on CentOS 6.6 final - no package available

I've added the "EPEL" repo: Loaded plugins: changelog, downloadonly, fastestmirror, presto Loading mirror speeds from cached hostfile * elrepo: repos.mia.lax-noc.com * epel: epel.gtdinternet.com * ...
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1answer
25 views

fwknopd on Centos 6.5

I'm getting the same error as this guy. Namely, Error: Package: 1:fwknop-server-2.6.6-1.fc21.x86_64 (/fwknop-server-2.6.6-1.fc21.x86_64) Requires: libc.so.6(GLIBC_2.15)(64bit) Error: ...
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1answer
48 views

date and hwclock not in sync - why

I am on GMT+8 and I set my hwlock to UTC. [root@sjoam2 ~]# date Sat Aug 1 16:32:04 SGT 2015 [root@sjoam2 ~]# hwclock --systohc --utc [root@sjoam2 ~]# hwclock --debug hwclock from util-linux-ng ...
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1answer
252 views

CentOS How to upgrade openssh to 6.9 [closed]

I have to upgrade openssh. I follow this page just instead the rpm 6.7 to 6.9 But When I run rpm -Uvh /root/rpmbuild/RPMS/x86_64/*.rpm I had problem : error: Failed dependencies: openssh ...
0
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1answer
21 views

sftp server chroot initial directory

I have configured an sftp server with chroot and it works fine, the only thing that is bothering me is the initial landing directory, since the sftp user does not have write permissions in the landing ...
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0answers
108 views

Got internal server error 503, after installing php-soap extension.

running on centos, here is terminal during installation ` root@localhost [~]# nano /etc/yum.conf root@localhost [~]# yum install php-soap Loaded plugins: fastestmirror, security Setting up ...
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1answer
27 views

Rsyslog failed to start CentOS 6.6 Final

I'm getting the following error message when trying to run: service rsyslog restart # service rsyslog restart : command not foundlog: line 2: : command not foundlog: line 3: : command not ...
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1answer
25 views

What might be using my smtp port on a new CentOS machine?

I'm trying to setup a simple email server using node smtp-server. I'm the only one that's ever accessed the machine (a CentOS 6.5 box on Digital Ocean), and I've only set up 2 http servers. I'm ...
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1answer
42 views

probing EDD boot message stays for ten minutes on centos 6.6

I am trying to bring up a Centos 6.6 qcow2 image on my virt-manager. Booting from Hard disk.... Probing EDD (edd=off to disable)... ok The guest machine stays with the above message for near ten ...
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1answer
47 views

In centos mouse and keyboard does not work after deleting /var/cache [closed]

After deleting accidentely /var/cache in centos 6.5, restart my PC, the mouse and keyboard does not work anymore
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2answers
35 views

Mail Server for a subdomain on a different Server?

I'm currently assigned the administration of a server that is accessed through a subdomain of another (not administrating example.com but y.example.com), and assigned to implement a web application on ...
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1answer
39 views

Rebooting a production CentOS 6 server that's been up for 365 days

I noticed today when running uptime that my server has been up for exactly 365 days. Which led me to google "should I periodically reboot my server". Which led me to the knowledge that YES, I should ...
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139 views

task nginx:4164 blocked for more than 120 seconds

My server was working fine for 173 days then it started to happen. Upgrading CentOS 6.6 kernel to latest one didn't helped. Rebooting helps for about 10 minutes then it starts all over again. I'm ...
1
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1answer
25 views

What files get modified by the authconfig?

I am trying to identify which files are edited with the following command, but can not find. authconfig --enablemd5 --enableshadow --enablecache --enablelocauthorize --enableldap --enableldapauth ...
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32 views

Supervisor 3.1.3 installed on Cento OS 6.4 hosted on DigitalOcean giving error while adding process

I have live server on Digital Ocean with Cento OS 6.4 hosted. I am trying to install supervisor for the Laravel-5 processes. But, when I try to add the process it gives me error as undefined process. ...
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110 views

Install PHP7 from Remi repo

I installed PHP7 from Remi repo with sudo yum -y install httpd sudo yum -y install epel-release wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm sudo rpm -Uvh remi-release-6*.rpm ...
0
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1answer
29 views

Apache Security Issue with VirtualHosts

I have setup Apache 2.2+php 5.3.3 on CentOS 6.6 and are running virtual hosts with their document roots setup like /var/www/domainFoldername and their virtual hosts configuration in httpd.conf like: ...
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19 views

CentOS Server can't exit pfSense Network

Not sure if this is a routing issue or a firewall issue, or maybe a problem with the ifcfg-file of the CentOS machine. Here is the situation. I just got a 600Mb fiber connection from my ISP into the ...
0
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1answer
101 views

Sensu Client not registering in Uchiwa

I have setup sensu on a Centos 6.5 box and installed/configured the client on the sensu box so it monitors itself like so /etc/sensu/conf.d/client.json { "client": { "name": "sensu", ...
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37 views

Postfix/Devcot Relay accedd denied and no SASL mechanisms

I am trying to configure Postfix and Devcot on my VPS and use it with Roundcube webmail and other Mail clients ( Outlook, Thunderbird... ). The problem that I am facing right now is that maillog ...
0
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1answer
57 views

Why don't I receive the emails forwarded by Postfix?

My desired Postfix configuration is to forward all incoming mails according to virtual aliases and be able to send outgoing mails via SMTP and TLS. Sending already works, but the forwarding does not. ...
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1answer
63 views

Error: “invalid number of arguments in ”uwsgi_param“ directive” on nginx restart

CentOS 6.6, nginx 1.0.15. I'm trying to configure nginx <-> uwsgi <-> Django stack, using this tutorial. The nginx conf file is: upstream django { server 127.0.0.1:8001; } server { ...
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19 views

PHP extension wont load after installing MPM-ITK

I installed Phalcon on my dedicated server and everything was perfectly fine untill I installed MPM-ITK to host multiple sites with multiple users. After installing MPM-ITK phalcon is only loaded in ...
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74 views

libgcc multilib version - unable to install any package with yum

System: Red Hat 6.5 I have a problem with libgcc, which is apparently installed in 2 different versions on my machine. Anyway, when I try to install literally anything, I am unable to do so, because ...
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33 views

Exim Email hacked or Backscatter attack

I have undertaken an Exim Server for a client, this morning I Woke up to about 100 bounce backs from Hotmail with the following: "Undelivered Mail Returned to Sender" Googling I have come across ...
0
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1answer
52 views

DDOS prevention/mitigation on Linux CentOs server using IP tables

One of our servers has generated a 19Gb access.log in the space of about 24 hours and the server went down in this time. We'd like to implement some measures to safeguard against DDOS attacks but ...
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18 views

WordPress Website is not caching properly

I have 4 WordPress websites on different Centos 6.5 VPS from DigitalOcean & Linode. I followed standard guide to install Nginx (have apache on one website), PHP, PHP-FPM and MySql. I followed this ...
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1answer
144 views

centos 6.6, sh: zip: command not found [closed]

Centos 6.6 64bit on OpenVZ VPS. I tried a phpinfo.php file using only the following code: <?php var_dump( exec('zip -r domains.zip "domains"') ); // phpinfo(); ?> . The php error log is ...
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14 views

How do I setup two ips in single network card in linux [duplicate]

I am using CentOS 6.6 and I'm going to configure single network card with two IP address. My configuration look like this /etc/sysconfig/network-scripts ifcfg-eth0 DEVICE="eth0" BOOTPROTO="dhcp" ...