CentOS is a Linux distribution standing for "Community ENTerprise Operating System" and is a rebuild of "Red Hat Enterprise Linux" (RHEL), belonging to the same company that distributes RHEL (Red Hat, Inc.). The "CentOS7" tag refers to versions 7.x-xxxx of CentOS, working only on 64-bit hardware. ...

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Firewalld management

As I asked it on this topic's comments: block all but a few ips with firewalld I'm looking for a way to deny all public IPs except for mine on the public zone of firewalld. For now, my public zone ...
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1answer
19 views

NTP service stopped in centos7.1 linux machine

In our 3 linux boxes centos 7.1, we saw below messages in the logs and then ntpd service got stopped since the offset is more than 1000s. systemd: Time has been changed ntpd[2626]: 0.0.0.0 0617 07 ...
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22 views

Optimizing a CentOS LAMP stack server [on hold]

I'm migrating several medium-traffic Laravel / PHP websites to a Digital Ocean 1GB droplet, and have been setting up my production server environment over the past few days. I'm attempting to start ...
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1answer
13 views

Centos 7 mysqlreport

I am using freshly installed Centos 7 on Google cloud. I input the following: wget hackmysql.com/scripts/mysqlreport chmod +x mysqlreport ./mysqlreport And go the following: ./mysqlreport: line ...
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Clamdscan error when launched by apache user “No file descriptor received. ERROR”

We're trying to use clamav on a centos 7 server in order to scan directly files on our web apps (Moodle for example). When trying to execute a clamdscan from apache, we got this error (the file belong ...
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1answer
23 views

How to authenticate to CentOS7 using LDAP if the posixAccount objectClass is unavailable?

Aim: authenticate to CentOS7 using LDAP Problems 1) User cannot be found calling ldap_search_ext with ...
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1answer
68 views

Mount windows server 2012 DVD on centos 7

I'm trying to install windows server 2012 R2 on a VM using virt-manager on centos 7. During the install it will not allow me to select the DVD drive (greyed out). I tried the following command: ...
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1answer
21 views

RHEL 7/CENT0S 7 IPA/IDM transitive trusts

I have a situation I am having a hard time getting a clean answer on. I have a IDM/IPA domain setup and I have a trust setup with my Windows domain. That part is working perfectly. I have a one ...
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16 views

vsftpd Not Starting CentOS 7 Job for vsftpd.service failed

So i set up my CentOS machine for a ftp server and i followed this (http://www.liquidweb.com/kb/how-to-install-and-configure-vsftpd-on-centos-7/) guide and when i try to start the ftp server with ...
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1answer
51 views

systemctl Failed to parse kill mode, ignoring mixed

On CentOS 7 I wanted to check the status of the nginx service: # systemctl status nginx -l nginx.service - The nginx HTTP and reverse proxy server Loaded: loaded ...
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15 views

Setting up Bridge

I'll be setting up a bridge network for kvm in CentOS 7. The thing is the server will be relocated to a new office in a few weeks, but I need to get it up and running now. I don't know if our ...
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1answer
14 views

Centos 7 nmcli creating new connections after reload

I have a Centos 7 server, on which I have configured two connections for the two NICs the server has. When I issue the command nmcli con show, I get this: [root@aplicaciones ~ ]# nmcli con show ...
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CentOS 7, WHM 11.50, Security Advisor has blank “Boot Kernel:” value and always recommends a reboot

And no, a reboot does not solve the issue. This is a VMware ESXi VM, probably at least ESXi 5.5 and maybe 6 (not sure, will have to check). This is a clean installation of CentOS 7, with a full yum ...
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44 views

how to turn a rescue kernel into a working one?

A yum update today made one of my CentOS 7 servers unusable: there is kernel panic as soon as the boot starts. I tried to start previous kernels from GRUB but all of them crash the same way. I even ...
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2answers
35 views

Using same port for http/ ssh on two ip's [closed]

How could use two diferent services using the same port on two diferent IP addresses? Example: IP 1 : 192.168.10.10: Service: Http Server Ports: 443 IP 2 : 192.168.10.11: Service: SSH Server ...
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1answer
46 views

CentOS 7, smb service requires a `systemctl restart smb` to work

CentOS 7, smb service requires a systemctl restart smb to work after rebooting. On each every reboot. Right after a boot, connections to Samba simply hang and then fail. Restarting the service makes ...
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9 views

Webserver isn't loading clientside after server reboot

After a Server reboot, my website isn't loading. It will try to connect but only shows a white page. I also noticed I got an error log. http://pastebin.com/jLctqkT1 And also, here is my httpd ...
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22 views

CentOS 7 -> CentOS 6 VM port forward using firewalld

I have CentOS 7 installed, and I need to run a JTAG server that is only compatible with CentOS 6. I installed a CentOS 6 minimal install (no NetworkManager, no GUI) in a qemu machine. I have the VM ...
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0answers
9 views

Centos 7 Wordpress Page not found error [closed]

i had installed a backup from my Wordpress Page on a fresh Centos 7 Server. things done: rewrite mod installed the htaccess file from wordpress have write permissions i changed AllowOverride to All I ...
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0answers
12 views

Reallocation space in Centos 7 from /home to /root

I have Centos 7 installed on my server. Below is the result of df -h which shows excess of space in home directory. I would to move excess of space to root, as application running on server uses space ...
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44 views

Haproxy service fails in centos 7 with certificate in a mounted directory

I am having an issue getting haproxy to load my certificate from a mounted directory when it is started with systemd. I can start haproxy directly as root without issue. Everything works fine if the ...
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1answer
22 views

RHEL and PHP versions

RHEL 7.1 ships with PHP 5.4 and that version is going out of support soon. Based on historical trends, will RHEL upgrade to a new major version of PHP? UPDATE RHEL 7.1 - PHP 5.4.16 RHEL 7.0 - PHP ...
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1answer
36 views

Network issue with Centos 7 [closed]

I've just installed the minimum install of Centos 7 in VirtualBox. When trying to ssh from my local into my VM I realise the VM is on a different gateway / ip range. My home network is on 10.0.1.x ...
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22 views

NGINX doesn't start on CentOS 7 reboot (fail on try to bind ipv6 address)

I have installed nginx / 1.8.0 on my server (CentOS 7.1), but does not start automatically after restart due to this error: 2015/06/20 10:34:11 [emerg] 827#0: bind() to [ipv6-address-here]:80 failed ...
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1answer
21 views

Firewalld with an IP alias (eth0:0)

(Solution found, see below...) The server (CentOS 7) has multiple public IPs, these are set up via the usual ifcfg-eth0:0 config files and are working fine. I'm trying to adapt to firewalld (coming ...
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1answer
33 views

New CentOS 7 server - Sending mail from a PHP application

Apologies for the newbie question but i'm hoping someone can provide me with some help/steps. I am in the process of migrating a website from a managed shared hosting account online to a new CentOS 7 ...
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63 views

Apache 2.4 Event MPM + php-fpm + php-opcache yields “Connection reset by peer” errors

I have a CentOS 7 server running Apache 2.4.6 with Event MPM and php-fpm version 5.6.10 (from REMI repo). Here's the relevant Apache config to send requests to php-fpm within the vhost (it's the only ...
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1answer
48 views

Trouble with network (ping, route, gateway)

I have a server running CentOS 7 and I connect to it by ssh. SSH takes a little bit to connect compared to the other server I have setup. This server has 2 ethernet ports (1 motherboard and 1 card). ...
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2answers
40 views

Trying to mirror a legacy PHP 5.3.29 app on CentOS 7 (strange I know!)

I'm wondering if any linux/php gurus out there could help. Long story short, i've been tasked with creating a mirror/backup of a website which is made in PHP 5.3.29 to mitigate any risks if the ...
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1answer
28 views

What are the consequences of installing some el6 packages on Centos 7?

I'm responsible for administration of a Centos 7 box at my contract job. I'm really more of a developer and not much of a Linux admin, so please bear with me and maybe try to explain this to me like ...
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59 views

Cannot connect to postgresql server running on CentOS 7

I've already done my best to search for an answer using google and using StackExchange, and if there was an answer there, I just didn't understand it and/or was confused by the language. Either way, ...
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15 views

Diskless node. Unable to mount root fs via NFS

Server: CentOS 7 NFS root filesystem for client and Kernel: Slackware 14.1 I enabled "Root file system on NFS" and "IP: kernel level autoconfiguration" with "DHCP,BOOTP,RARP" support, recompiled the ...
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1answer
45 views

How to make indentifiable the RAID drive by CentOS7 on HP Proliant DL785 server? [closed]

I have a HP Proliant DL785 server, and I want to install CentOS7 on it. But the installation is not commencing, as my RAID drives are not being identified by the installation setup. Since I am a ...
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0answers
19 views

When using HTTPS Index.html showing instead of ProxyPass reverse proxied site on Centos 7 Apache 2

The goal is that external users can connect via HTTPS, go through basic auth on Apache and then view a proxies tomcat site. I have set up a reverse proxy to a tomcat server running on the same ...
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3answers
69 views

How to terminate a process(httpd) when its PID keeps on changing in CENTOS 7

When I tried to restart my httpd service using systemctl restart httpd Checking the status, I found that process is dead and another process is running. so I removed it using yum erase httpd As a ...
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0answers
51 views

Centos 7, root is almost full, already try du -shx and lsof | grep deleted but still can't find the culprits

We are using centos 7 and have 50G allocated for root. We are running out of spaces as df reported that 45G (90%) is used. But when I try to find what's been eating the space, du only shows less than ...
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1answer
61 views

CentOS cifs client sees Windows 2012 deduplicated files as symlinks

I have CentOS 7.0 VM with a volume mounted on a Windows 2012-R2 file server. The volume contains some big files related to an internal Wordpress site. About a week ago the site became 'broken' and ...
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0answers
28 views

CentOS Raid 1 drive fails on raid-check

I have a pair of HP DL320e servers configured identically with two WD Red 6TB drives in a software raid 1 array. The DL320e has an on board raid controller which is disabled in favour of linux ...
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0answers
31 views

SSH stalled after a while

I am executing some commands over SSH from a linux client (centos 7) toward a server (wind river linux) and for a reason it always stopped ( not completed ). If i executed a command that take short ...
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1answer
38 views

Allow certain IP addresses to SSH [closed]

I want to allow only a few IP addresses for making SSH connection. I'm using CentOS 7 with firewalld and OpenSSH SSH client. How can I achieve this?
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2answers
46 views

InnoDB: mmap(68878336 bytes) failed; errno 12

The screenshots explain everything, first I try to start it, and it won't, so I check the status, then I check the logs. After following a number of previous suggestions that I founder around ...
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0answers
14 views

Unable create/access storage pool in a KVM

I have trouble using storage pools in my KVM setup. I get the following error message whenever I try to use a pool-* command in my virsh shell. virsh # pool-list error: Failed to get the number of ...
1
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1answer
55 views

VSFTP Fails to start CentOS 7

i am unable to get VSFTP to start with centos version 7. Everything appears to be set up correctly but I get this error is var/log/messages vsftpd.service: control process exited, code=exited ...
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1answer
42 views

CentOS 7 ntpd not synchronize with AD domain controller

i've a problem with time syncronization of a CentOS 7 host with a Windows 2008 R2 Domain controller. If I use the command ntpdate -u host.domain the synchronization is ok. But using ntpd the time is ...
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51 views

How to pass boot paremeters to a XenServer HVM? Is it even supported?

I'm willing to build up a fully automated installation of CentOS 7 over XenServer 6.5 using kickstart. According to XenServer 6.5 Documentation, CentOS 7 is now supported in HVM mode: In XenServer ...
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2answers
73 views

NFS stop working when on a lvm

I have a nfs server that was working correctly with a share on /exports/something. However, when I mount /exports/something on /dev/mapper/something (a lvm with more space) the nfs does not work. The ...
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1answer
36 views

Establishing HTTP Connection Failing but HTTPS is working

I have this issue which is racking my brain. On my local machine, I experience no issues with connecting to my server, here's where it gets odd... Google Webmaster Tools is stating google cannot ...
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1answer
86 views

Ansible shell command fails under sudo when it should succeed

I have an Ansible task based on https://github.com/al3x/sovereign/blob/master/roles/tarsnap/tasks/tarsnap.yml#L2 that keeps failing when it should succeed. I used to run the role with ...
2
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1answer
41 views

Cobbler import failing

I've been playing with Cobbler lately (on a CentOS 7 distrib), and I've gone through an error while importing a CentOS 7 iso. I've been able to find a work around to the problem, and I thought it'd be ...
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1answer
47 views

KVM Networking trouble

I'm running KVM on a centOS 7 server and it has been working fine, but occasionally the network connections to the virtual machines seams to drop and the virtual machines can't be reached until the ...