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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Getting a specific CentOS base image with mkimage-yum.sh

Docker's mkimage-yum.sh does indeed work (awesome little script) but it pulls 6.6 (the latest with updates). I was wondering if it's possible to specify 6.5. I believe I can use yum.conf but the yum ...
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1answer
14 views

Installing Samplicator on CentOS

I'm trying to install Samplicator to test Netflow central collector and then forwarding to other collectors from there. I mainly want to use Samplicator due to it being able to easily sample the ...
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0answers
12 views

iptables: No chain/target/match by that name while setting IP Rotation [duplicate]

I want to set IP Rotation using iptables so I am using below code. Don't know what is the wrong, It is showing error iptables: No chain/target/match by that name. iptables -t nat -I POSTROUTING -m ...
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16 views

CentOS 7 with Red Hat Satellite 6

We're using Satellite 6 to manage our RHEL servers. For some side projects, we'll be using CentOS 7 to limit the costs. Of course we'd like to use Satellite 6 as well to centrally manage these CentOS ...
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1answer
45 views

Upgrading to PHP 5.6.7 using remi repos

I have PHP 5.6 enabled in my remi.repo file and none of the other sections are enabled the only other section enabled is [remi] itself. [remi] name=Les RPM de remi pour Enterprise Linux 6 - $basearch ...
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5 views

ipmi_si module is missing and can't be found

Looked all over google and stackoverflow; can't find an answer to this "simple" problem. Background: I have a Supermicro server running centos 6.5 kernal 2.6.32-431.29.2.el6.x86_64. I have been ...
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1answer
52 views

CentOS 7 installer: blank screen

I am trying to figure out CentOS 7 unattended network (PXE) installations in my setup, but the installer always ends up running into a black screen without interaction options. This is being tried in ...
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1answer
66 views

How to delete all php files first line? [on hold]

How to delete all php files first line? I used the following command, but it works only for present directory and not recursively. sed 1d file.php Please tell me the command or script which delete ...
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26 views

Random machine hangs with NFSv4 on CentOS/RHEL 6.5

We have an in-house "compute farm" with about 100 CentOS (free re-distribution of RHEL) 5.7 and 6.5 x86_64 servers. (We are in the process of upgrading all the 5.7 boxes to 6.5.) All these machines ...
1
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1answer
38 views

Nginx doesn't start using systemctl

I have defined a custom error_log for a virtual server inside it's directory like so: server { listen 80; server_name www.example.com; root /home/www.example.com; ...
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0answers
21 views

Something use high CPU on centOS PLS HELP ME [on hold]

He constantly uses all of the processors in something. even if I close it comes back pls help me :| http://i.stack.imgur.com/5C2Rb.png
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29 views

Blocking Low-bandwith layer 7 attack [on hold]

Lately I have been experencing Layer 7 bandwith attacks on my server running centos 6.6 16 gigs of ram. These attacks cause mysql tro skyrocket to 500-600% The requests are as followed. ...
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2answers
41 views

How to enable CentOS 7 to connect to an external SMTP? [on hold]

I have a web application deployed in a webserver, running on a CentOS 7. This web application sends e-mails through an external SMTP (in-v3.mailjet.com, port 587). How can I enable CentOS to connect ...
1
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1answer
30 views

how to invisible samba folder from unwanted users?

How to hidden samba shared folders from unwanted users.The folder should be visible for that particular user.How to do it?
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0answers
10 views

In RHEL7 / CentOS 7, how can I add a banner text to display on the GUI at the login prompt using Gnome Display Manager (GDM)? [on hold]

Following RedHat's instructions do not work! https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Desktop_Migration_and_Administration_Guide/customizing-login-screen.html ...
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0answers
16 views

Why cron doesn't work to me? [migrated]

I'm on centOS 7 and I have a wordpress site. Due to some problems with the wordpress default wp-cron settings, I have choosed to do the cron tasks with my server instead. I have used this command: ...
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0answers
22 views

How to debug high load httpd instances on pretty heavy server [on hold]

I have a pretty hefty server with just 5 to max 10 concurrent users online. its a 64gb intel i7 ssd server. i dont understand the high load. i use redis on the server, and pages load within 1.5s. ...
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2answers
37 views

Automicly report brute forcing ip's [on hold]

Hosting is awesome. But hackers and bots trying to break into your server are not. I actually hate them. So, today i launched a new server with directadmin. And all is great. But a few minutes after ...
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0answers
25 views

My webhost has put my CentOS6 dedicated box in “rescue mode”, after a “minimum grub boot” (their words) [on hold]

...and I frankly have no idea where to start. I've run my own boxes for a couple of years, but this is beyond my skill level. I've had the box a few months just as a backup server. I logged in and ...
1
vote
1answer
30 views

CentOS server not responding

I have a CentOS 6.5 server for hosting. It has sshd, httpd, mysqld, smtpd, dovecot, postfix, named working fine. but since last year I updated the server to PHP 5.4, MySQL 5.5, it starts having ...
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0answers
8 views

Installing OrionContextBroker 0.19 (Fiware) on CentOS 7 [on hold]

I have an error while installing OrionContextBroker 0.19 on CentOS 7. Error: Package: contextBroker-0.19.0-1.x86_64 (testbed-fi-ware) Requires: libboost_thread-mt.so.5()(64bit) Error: ...
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0answers
22 views

Centos Web Panel: Apache root path changed [on hold]

I have a CentOS web server running Centos Web Panel (CWP). For some reason, after a restart, my webserver stopped working. I found out Apache is using another root path as CentOS Web panel is ...
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0answers
14 views

Installing latest wireshark impossible? [migrated]

It looks like installing a later version of wireshark is near impossible on redhat 6. I've searched the web extensively and can't find any questions where someone has said their issue was resolved. ...
1
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1answer
128 views

CentOS 6.6 with Nginx 1.6.2 - Suddenly can't restart nginx - nginx: [emerg] open() “/usr/share/nginx/on” failed (13: Permission denied)

This is a new install in which nginx previously started and stopped normally. I believe this error arose after enabling server blocks which tested (nginx -t) successfully. I then tried to restart ...
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44 views
+50

Move home directory on Azure Linux VM

I continue to encounter an issue moving my home directory to a new disk on a CentOS VM on Azure. On creation the server is configured to use a SSH key for authentication and the "no password" option ...
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0answers
15 views

Process with the strange name loads CPU [duplicate]

[Centos 6.5, vps] > top 29348 root 20 0 94728 2108 208 S 297.2 0.0 40:22.57 dfyjqsizih > ps -ef UID PID PPID C STIME TTY TIME CMD root 29348 1 99 11:39 ...
3
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1answer
27 views

Additive SNMPd configuration in CentOS

I have a small program that I am preparing for release. As part of its functionality, it queries SNMP for a few statistics. The MIBs in question are installed by the default net-snmp package, but are ...
0
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0answers
28 views

Block ICMP timestamp & timestamp reply with firewalld

OS: CentOS 7.0 Per the results of a security scan, it has been suggested that we block ICMP timestamp & timestamp reply messages using the firewall (CVE-1999-0524). I've used firewalld to set up ...
0
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1answer
37 views

How to block an ip range in Firewalld

I know I can use the below command to block a single ip: firewall-cmd --permanent --add-rich-rule="rule family='ipv4' source address='115.239.228.12' reject" but I need to block all ips starting ...
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1answer
23 views

Php executes with different results in command line than when browsed to in Apache

I setup a CentOS 7 vm webserver with the LAMP stack. Over the last few days I have been trying to get an LDAPS connection working to my Windows Server 2008 R2 Domain Controller. I have been able to ...
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15 views

Preventing a read-write first automount after adding a VHDX onto a CentOS7 HyperV VM

I have a VHDX file (representing a non-boot ext4 fs) that I need to run some forensics on. I have a working CentOS7 HyperV VM on a Win2012R2 host. I want to attach the VHDX to the CentOS7 VM, which ...
0
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1answer
35 views

RPM or YUM equivalent of apt-get install libgraphicsmagick1-dev

I was using Ubuntu for development and one of the dependencies needs apt-get libgraphicsmagick1-dev now I need to deploy to a AWS EC2 which runs AMI and only support YUM or RPM, what the the ...
0
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1answer
12 views

Update Amazon EC2 Rightscale Centos for latest GLIBC

We've run into an issue on an Amazon EC2 instance where we need a later version of glibc. I understand I need to update Centos (current version is 5.6) to acheive this, and I've tried various ...
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0answers
13 views

Configuring a subdomain in CWP Admin [closed]

I am trying to find out how to correctly configure a subdomain in CWP Admin. Forgive me but I am still learning CentOS as a web server, and experimenting with a VPS. So far I have: 1) added a user ...
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1answer
28 views

Centos running if - then command with multiple allowed values

Is there a way to run a if command in a script that can match multiple values for example I would push a script to a bunch of servers and each server would only run the command if the servers host ...
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1answer
30 views

1 IP to multiple different physical web server / web server machines

My configuration [ OpenWRT on my Router ] [ Centos 6.4 , Apache 2.4.6 - Machine A ] [ Centos 7, Apache 2.4.6 - Machine B ] I've 1 IP address pointing to my OpenWRT Router. I had 1 WebServer ...
3
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1answer
48 views

SSH hangs for several minutes at a time

I can SSH into a server and run commands just fine, but usually within a minute or so the session will appear to hang (become unresponsive). I can type commands but they're not even echoed on the ...
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0answers
4 views

Tripwire proper policy modification steps

I have a Tripwire setup whose policy I had to modify several times. I learned that I have to run both of these commands after every policy change twadmin -m P /etc/tripwire/twpol.txt then: sudo ...
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0answers
11 views

Puppet + kvm + infrastructure [closed]

First off thanks for any help/advice and sorry I'm new to a lot of these areas. I have been working with Linux for several years now, but it has just been the basics system admin stuff like ...
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0answers
24 views

Elastic ip address is not assigning automatically on AWS [closed]

I followed this blog to automate elastic Ip address on AWS. [http://www.idevelopment.info/data/AWS/AWS_Tips/AWS_Management/AWS_14.shtml#About%20the%20Author][1] I completed all the steps.But the Ip ...
0
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0answers
29 views

Vlan trunk between three switches and KVM Guests

I'am trying to find information regarding the appropriate configuration between three switches and KVM. More depth as per diagram. I need to create a tunnel for traffic created on sw1-port5 to be ...
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0answers
28 views

How to install httpd-mmn on RHEL 6.5? [closed]

Input such a command: rpm -q --provides httpd | grep httpd-mmn it outputs: httpd-mmn = 20120211 if I install php55w with rpm -ivh php55w-5.5.22-1.w6.x86_64.rpm It shows this: error: Failed ...
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0answers
49 views

Servers running SOCAT crashing [closed]

I host a series of servers however a number of them are under constant DDOS attacks. These attacks are easily mitigated through a system I have created with a high level of success. The system is a ...
2
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1answer
92 views

Apache CentOS 7 403 Forbidden Anyone?

I am trying to setup a situation where I can FTP to my Linux CentOS 7 server and update the web site files from my Windows 7 system. At this point I can FTP to my user's folder using vsftp ...
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2answers
39 views

Why am i getting execute binary file error?

Hi all i am getting following email every 10 min. as I own the VPS. I am not expert in linux and am learning to manage linux servers. Please help me why am i getting these emails and how to stop them ...
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0answers
12 views

how to point subdirectory for domain from another project?

how to point OctoberCMS to subdirectory(installation guide), i have previously installed PongoCMS(laravel based), what i want is need to access PongoCMS from www.example.com and want to access ...
0
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1answer
17 views

Stop error logging of specific event [duplicate]

How do you stop logging of a specific event on a centos error_log. I have a file which is blocked via .htaccess but each time it is accessed I get a new line on the log saying: [Tue Jan 27 09:48:42 ...
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0answers
19 views

How to say: Keep connection alive with command line script forticlientsslvpn_cli

With the command line script forticlientsslvpn_cli, how can I say: Keep connection alive until manually stopped? With the window-version forticlientsslvpn I can. Thahks.
3
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3answers
66 views

home dir and shell for Active Directory authenticated users

I have successfully configured sssd and can ssh into a system with AD credentials what I am missing is the creation of a home directory and bash set as the shell. My assumption is that if I log on to ...
0
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1answer
20 views

Howto forward traffic between multiple OpenVPNs

I have an OpenVPN server which hosts two VPN networks, one is bridged and the other one is routed. See the following draft: The VPNs are working quite well while they are used in isolation. But if ...