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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Systemctl: find out which commands are applicable for a service

How do I find out which commands are applicable for a service with systemctl? # systemctl reload nagios.service failed to reload nagios.service: Job type reload is not applicable for unit ...
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23 views

In a virtual lab environment, I have a pxe server timing out

I've built a pxe server using CentOS 7. The client times out with a message of: Connection timed out (http://ipxe.org/4c126035) When I look at that link, it says 528 rc = -ETIMEDOUT;, but ...
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18 views

Unable to create CentOS 7.2 Kickstart DVD

I'm quite new to the kickstart concept and I've been reading and testing this for the past few days and I'm having an issue I can't seem to find anywhere on the web right now... At first I wanted to ...
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1answer
23 views

How to upgrade LAMP on CentOS? [on hold]

I am running CentOS 7.2 (as confirmed by hostnamectl). And according to Wikipedia, this was released 2015-12-14. Now according to PHP, the only supported version at that time was 5.6. However, when I ...
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1answer
19 views

nagios.service start operation timed out. Terminating

I have a Centos 7 Box on which I have installed Nagios and then migrate all the config files from an old Centos box. Everything looks fine, nagios -v doesn't return any error. However, systemd is ...
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1answer
23 views

Should i use Firewalld or Iptables for Fail2ban in Centos 7?

I'm setting up Fail2ban to protect ssh, and I use firewalld, I saw a lot of people recommending to use anaction = iptables-multiport and other solutions using iptables instead of firewalld claiming ...
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1answer
21 views

Running dmesg on Docker results in “dmesg: read kernel buffer failed: Permission denied”

In order to debug why this issue occurs the following command is run on a container: docker run -it <dockerImageName> dmesg results in: dmesg: read kernel buffer failed: Permission denied ...
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51 views

Running systemd on Docker results in “Failed to get D-Bus connection: Operation not permitted”

In order to run a service on a container, systemctl start <service_name> was run. As this failed the following command was issued in order to debug the situation: docker run -it ...
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1answer
19 views

Unable to reinstall fail2ban after completly removing it from Centos 7

After completely removing Fail2ban from Centos 7, I decided to reinstall it. So I run the installation(yum), and everything seems ok, no errors, But the it seems like the installation does not create ...
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2answers
13 views

Dovecot quota doesn't reject incoming emails when quota is exceeded

I've got VPS under CentOS 7 with Exim+Dovecot mail system. cat /etc/dovecot/conf.d/10-mail.conf mail_privileged_group = mail mail_access_groups = mail mail_location = maildir:%h/mail/%d/%n ...
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13 views

Bootloader password - existing content found in /etc/grub.d/01_users

I need to set a bootloader password and am apprehensive about changing the existing config (per warning about potentially making a system unbootable). RH documentation says to add the following ...
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1answer
26 views

How to properly configure a 2 node glusterfs system?

I am trying to make a 2 node linux servers with high available apache using glusterfs 3.7.6 for data replication and pacemaker+corosync as resource manager. However i'm seeing a problem with gluster ...
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1answer
34 views

Centos 7 build 1511 is missing firewalld?

I maintain some scripts to set up servers and I have noticed setting up new machines from 1503 to 1511 that with my particular kickstart configuration that the firewall behavior is quite different. ...
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1answer
18 views

Multiple tmpfs exists with total combined space more than total memory

I have a VPS with 7.5G ram running CentOS 7, and tbh I haven't done much optimizations etc as its serving the site pretty good. Today I was going to create a ramdisk for mysql temp tables, so I ...
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22 views

Configuring `yum` to work with automounted `/opt`

yum software collections seem unhappy with an automounted /opt on CentOS 7. How do I tell yum not to try installing material there? I'm starting with a fresh CentOS 7 install – newly-installed with ...
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9 views

centos apache php uploaded files ownership

I am configuring Apache and php on Centos 7.1 VPS. I am new to server administration. I Installed Apache, php and php is running as a module of apache using mod_php. I am trying to run 2 sites, so i ...
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13 views

What is GNOME doing at login that the console doesn't?

I have a series of lab machines running CentOS 7.2, authenticating via Kerberos and getting user data from NIS, then with home directories on NFS. When logging in, very often, the user puts in their ...
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17 views

wget truncating files in centos 7

We have used this on Centos 5 and 6 without issues for years: if /usr/bin/wget --timeout=120 --user=$User --password=$Pass -S -O ${Tmp_path}/${Tmp_file}.asc ${Rules_url}/sigs-${Version}.tar.gz.asc ...
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1answer
40 views

All Webmin users created are 'root'

I'm still fairly new to all of this, so please be gentle. I'm currently running the Webmin/Virtualmin combo on Centos 7 (linux). I was looking for a simple solution to allow someone to upload files, ...
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9 views

http://127.0.0.1 returning 401 Unauthorized [migrated]

I have a CentOS 7 box and have a service running on port 32400 (Plex Media Server) which is trying to pull some information via HTTP to http://127.0.0.1:32400/library/changestamp but a 401 response is ...
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27 views

Shared Folders with VMWare Fusion 8 and Cent OS 7

I'm trying to setup a CentOS 7 image in VMWare Fusion 8 and would like to enable shared folders. Initially, I tried using the copy of VMTools provided with Fusion. I get to this point in the ...
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1answer
19 views

CentOS7 Network Bridge Fails on boot until cable unplugged and plugged back in

I have a problem with a brand new CentOS 7 server I am trying to set-up. I have set-up a network bridge as per instructions on the redhat documentation website and it all works great until I reboot. ...
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1answer
32 views

Server Signature displaying even after config change

I am working on Apache 2.4, i want to make Server Signature off, so that when i get a error in the application it won't print all the information of the server. So, i added below lines of code ...
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2answers
28 views

Handle UTF-8 files names in Centos 7 & Apache 2.4

My images whose names contain accented letters (é, à etc.) are not accessible via Apache (404 error). I think it's not related to Apache. I checked the configuration file: AddDefaultCharset UTF-8 ...
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1answer
41 views

Run Perl CGI Scripts On CentOS 7 With Apache/Httpd

My CGI Perl scripts CentOS 7 are not running correctly, they are either showing up as plain text or I am getting a server error. I've been placing my scripts into the default /var/www/cgi-bin ...
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45 views

Why is CentOS 7 ignoring NETMASK?

I have a networking issue that I eventually tracked down to an incorrect network prefix setting. ip addr is reporting that the current prefix is /8 when it should be /24. However, when I look in ...
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5 views

ocredit ignored in PAM config

oscap is reporting that ocredit requirements are not being met. Current system-auth config: auth required pam_env.so auth sufficient pam_unix.so nullok try_first_pass auth ...
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14 views

Apache timeouts when 2 users with same IP

We have 2 servers both running centos7 and apache 2.4 that are used for completely internal use only. The problem when 2 people in the office with of course the same IP try to use the server via their ...
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23 views

systemd apache service start is denied by selinux on centos 7

I am trying to start a custom httpd service from systemd on centos7. on the command line all works fine but from systemd it fails. the command line to start httpd is /usr/sbin/httpd -f ...
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34 views

Installed Ajenti panel, it starts but accessing it makes it stop

I am on CentOS 7. So when I go to https://x.x.x.x:8000, it doesn't load anything. If I disable ssl from the Ajenti config file, then it connects without ssl. With SSL enabled however, I have ...
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2answers
103 views

PHP 7 conflicts with PHP 5 (Centos 7)

Trying to install PHP 7 now that it's available; (on centos 7) added repo's: rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm rpm -Uvh ...
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24 views

Cant change user quota on xfs partition

I cant change user quota even command exit status is 0. Used: xfs_quota -x -c 'limit bsoft=1024m bhard=2048m 56a4d3057ec81767ebe0415b' / Also used webmin interface to update user quota but on ...
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13 views

Permanently enable a SCL

Is there a way that I can permanently enable a SCL? I've installed rh-php56, and I would like to make sure that it is loaded every time I ssh into my machine. I am currently running CentOS 7.
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20 views

CentOS 7 screen session has been terminated unexpectedly

I've default CentOS7 server without any additional software except of WildFly10 and I'm the only user there. I'd run WildFly using screen command and logged out from the server until it became ...
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0answers
10 views

How connect to Router in eNSP from CentOS?

I have eNSP installed on Windows Server 2008 R2. On eNSP there is Router, connected through cloud to this host's machine adapter (VirtualBox or LAN). I need to get connection to this Router from ...
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4 views

Screen wont work once monitor is disconnected [migrated]

I have a JetWay PC (JBC375F3AW) running CentOS7. When it boots up everything works OK. If I remove the cable going to the DVI port and re-connect it, it wont work. The same goes if I boot the box ...
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1answer
37 views

How to change Default Port used by PostgreSQL 9.5 on CentOS 7?

Does someone have an idea about how to change default port for PostgreSQL 9.5, I did the same on previous versions and I just modify the following files: /var/lib/pgsql/9.5/data/postgresql.conf ...
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25 views

Centos 7: ntpstat unsynchronised

I'm setting up a server with a service that is very sensitive to date/time. So I'm trying to configure ntpd but it doesn't seems to work. I'm using the default Centos 7 configuration with the ...
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1answer
83 views

Centos 7 nginx php upgrading

My currently running website works great and it currently using php 5.4.45 FPM/FastCGI, however I would like to upgrade to php 5.5.9+ for an api documentation subdomain that has that php requirement. ...
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35 views

XEN 4.6 + Centos7 dom0: boot sequence not shown

As per subject, when the machine is booted in the Xen environment, the screen blanks until the login: prompt is shown. Booting a vanilla kernel results in the usual screen output. Advice? Cheers ...
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1answer
55 views

Checking if my hostname is correct (ovh vps + centos7)

I recently purchased a VPS from OVH with Centos 7 preinstalled. I want to make sure my hostname is correctly set. According to some tutorials: hostname returns the hostname hostname -f returns the ...
2
votes
1answer
40 views

NFS clients sometimes hang for 15 seconds

NFS server: CentOS7.1 (kernel 3.10.0-229, nfs-utils 1.3.0) Some clients are Ubuntu Precise (12.04) using NFSv3... they work fine. The problematic clients are running CentOS7.1 using NFSv4.1 (or ...
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votes
1answer
37 views

converting jpg to mpg fails in convert/imagemagick

I'm running Imagemagick on CentOS 7, converting a directory of .jpg files to an mpg file and getting this error convert -delay 5 fileprefix*.jpg -quality 80 test.mpg convert: delegate failed ...
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2answers
61 views

.htaccess Permission Denied (Apache, CentOS 7)

I'm encountering an issue with .htaccess. I have searched through the Internet and all the solutions didn't work. Please help me! Thx! In the Apache error log, it has the following line: ...
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1answer
58 views

python-augeas, yum update error in CentOS7

I'm coming across this error below when I run: sudo yum update Downloading packages: No Presto metadata available for base python-augeas-0.5.0-2.el7.noarch.rpm | 25 kB 00:00 ...
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2answers
31 views

Apache webserver HTTPS port redirects to HTTP with port 443

At my work I installed Mediawiki (latest version) on a Apache webserver 2.4.6 with PHP 5. Everthing works fine when I want to access the wiki pages locally and I configure a hostname in Mediawiki ...
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2answers
71 views

Centos 7.1 - 32 bit program on 64 bit OS

I have successfully installed a piece of 32 bit software on a 64 bit VPS running CentOS 7.1. I had to install the 32 bit library before it would install but now when I try to launch it I am getting ...
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2answers
73 views

Configure Fail2ban for SSH and ldap

I have a fail2ban Installation on two Centos7 machine. And I want to secure SSH with it so I installed (The SSH protecting seems active) and set the allowed pw-fails to 5 and I left the banntime at ...
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1answer
56 views

A lot of 'tmpfs' in CentOS7

I migrate 10 CentOS6 to CentOS7. For six month all the servers are working great aside from one. The DB that is running on is having problems every couple of days, the only different from that server ...
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31 views

CentOS + IPTables

I am trying to setup a CentOS 7 server with Squid as a proxy server. The proxy server is strictly private and doesn't need to be available to anyone other than myself and other 2 servers, therefore I ...