CentOS stands for Community ENTerprise Operating System, the most popular Linux distribution for web servers with almost 30% of all servers using it. Third-party software is not included in the base.

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Centos 7 won't join or leave a domain

I have a centos 7 server with samba share for windows client, the samba is authenticated via active directory. I've first joined the domain using realm join my.domain Everything worked fine for a ...
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6 views

iPXE failes to downlaod via HTTP 1 out of 5 times

I've set up an iPXE server, all file downloads are done via http. The problem is that every 1 out of 5 times it'll fail to download the file, it'll show me an error "couldn't retrieve file" and ...
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27 views

Is there any project like debops for CentOS/RHEL?

Debops - A collection of Ansible playbooks, scalable from one container to an entire data center. Is there any alternative project for CentOS/RHEL?
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11 views

Can I get a cumulative In and Out counter for SNMP of my CentOS Linux servers from Nagios?

My SNMP monitoring server (Nagios) has a handful of plugin files for network interface monitoring, none of which so far have really helped me, or my parameters are not correct. I am monitoring remote ...
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2answers
79 views

Is my Port 3838 Open based on this netstat -tulpn?

I am trying to host a Shiny R Web Server on a CentOS Virtual Machine. I am troubleshooting some networking issues, but I want to confirm that the port is open. I have a Static IP address for this ...
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48 views

Centos 7 KVM cifs mount issues

I am having a issue with Centos changing my KVM images folder from the default to a Cifs Shared folder. Any time I try it, it returns a error like so: [root@localhost Centos_Atomic]# systemctl status ...
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1answer
149 views

Mount AFP share on CentOS 7

I'm running into problems when attempting to mount an AFP share on CentOS 7. Currently using mount_afp with fuse but whenever I try to mount something mount_afp segfaults in glibc. I'm either looking ...
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20 views

grub2 on my embedded Board Corrupted, entered into grub rescue mode

I am working on a Intel board with CentOS running on it. My grub2 got corrupted. and entering into grub rescue mode Problem - whenever I reboot the device. grub rescue contains below info, when I ...
2
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1answer
32 views

Cross-origin directives in httpd.conf?

I am a part time Apache administrator (not by choice). We have an animated gif hit counter. I want to add a CSP to disable active content, but include a CORS policy to allow the gif for the hit ...
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0answers
5 views

footer.html not being included on CentOS?

I'm a part time Apache admin (but not by choice). I'm trying to get a common footer configured on CentOS 7. The pages are plain HTML and they are being served correctly, but they lack the footer. I ...
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111 views

CentOs 7.1 - Install Tomcat 8

I am using this tutorial as a setup reference to getting a Tomcat 8 running on CentOs 7.1, but after typing: [root@localhost tomcat]# sudo systemctl start tomcat I get the error: Job for ...
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18 views

squid listens port but does not work

This is what i've got from netstat -plant tcp 0 0 :::3128 :::* LISTEN 2345/(squid) and this is my config file # # Recommended minimum ...
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17 views

How to clear swap used on CentOS?

top is showing very high swap used. Which is causing nagios to throw alerts. I've tried running swapoff -a && swapon -a sync; echo 3 > /proc/sys/vm/drop_caches but it doesn't clear the ...
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0answers
32 views

ifcfg-eth0 not being recognized after network restart

I am trying to configure a Bridged connection on a Centos 6.7 Virtual Machine, on a Windows 7 host. I have a static IP and a MAC Address for the host ethernet adapter (as shown in eth0). I have an ...
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1answer
49 views

Centos 6.7 Partitioning command

The current storage on the server is Filesystem Size Used Avail Use% Mounted on /dev/vda1 118G 109G 3.0G 98% / tmpfs 2.9G 0 2.9G 0% /dev/shm /dev/vdc 118G 40G ...
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1answer
27 views

Puppet class with parameter

I am trying to get a puppet class with parameters, Here is what I've tried class testing ( String $file = 'testing' ) { file { "/tmp/$file": ensure => present, mode ...
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1answer
172 views

Can't ping on CentOS when second adapter in virtualbox is enabled

When enabling second adapter for host-only, I cannot ping annymore it tells me unknown host but if I ping with the IP address it just works. so the problem is when I want to install a software via YUM ...
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1answer
16 views

Using the command line in order to change hosts/hostnames on Centos

I need to use the command line in order to add a new host resolution on a temporary basis. I use centos. I need a new localhost resolution such as the following: 127.0.0.1 something.localhost ...
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11 views

How to migrate e-mail accounts from one server to other

I have copied the content of /home/username/mail folder from one server to the other (source is Centos 5 and target is Centos 6). Then I tried to list the e-mail accounts and the list appears empty. I ...
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1answer
30 views

Make local Centos server at home public, safe?

So I have a Centos local server at home. I want to make it accessible over the internet (public). I know I have to forward port 80 (HTTP) and 21 (FTP). My main question is, is this safe? Or should I ...
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18 views

Troubleshooting my Bridged Connection with Static IP for VM

I am literally pulling my hair out trying to configure a bridged connection on a Virtual Machine (CentOS 6.7) with a Windows 7 Host. For the life of me, I cannot figure out how to get this working. ...
2
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1answer
60 views

Whitelisting commands a user can use with sudo

I've been attempting to set up a whitelist of commands a user can run on my system. The server I'm using is running CentOS 7. What is the syntax that should be used to only allow a certain group of ...
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1answer
32 views

Systemd service successful but did not start script

I created a script that has to start on boot. So for this script I created a systemd service and enabled it in systemctl. The script is creating a folder in /mnt, then mounts a cd to it, copies files, ...
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1answer
26 views

svn diff suddenly not showing anything, even though svn status shows modified files

I made some changes to a local, up-to-date repo, on CentOS 7, svn 1.7.14. Running svn diff shows the changes. Not sure if this has much to do with it, but a while later, I did an svn copy over to a ...
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65 views

Installing VMs in CentOS 7 host from ISO?

I'm trying to install a CentOS 7 guest in a CentOS 7 host, using text only. I'm using simillar commands as: virt-install --name centos7 --ram 1024 --disk path=/var/kvm/images/centos7.img,size=25 ...
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1answer
39 views

error: rpmdb: damaged header #1439 retrieved — skipping

Could you please any one help me? I'm getting following error message "error: rpmdb: damaged header #1439 retrieved -- skipping." while I'm trying to install Samba server. I tried Google search but ...
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1answer
104 views

Conflicts between attempted installs while installing gstreamer plugin on Centos

I am trying to install gstreamer-ffmpeg package for opencv c++ coding purpose on Centos-6.7 When I type; sudo yum install gstreamer-ffmpeg* it gives error: Transaction Check Error: file ...
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0answers
304 views

How to mount NFS share in OS X Yosemite?

I have an NFS server (CentOS 6.6 at IP 192.168.1.16) that shares a folder /nfs/share. I want to mount this folder from a Mac laptop (at mount point /nfs/share). When I tried the following: sudo ...
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1answer
27 views

Centos 7 + Plesk, Cant access control panel

I am in this horrible situation. I have tried several ways to get my VPS server properly to work. My problem is that my server anru.info is pointing to https://server1:8443/ instead of [IP]:8443 or ...
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0answers
23 views

Why would `apachectl -t` be killed?

Our CentOS 5/Apache 2.4 web server just died (within the last couple of hours). I checked with the other project admin, and neither he nor I made any config changes recently. I checked history with ...
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51 views

Impossible to Switch User in CentOS

We have a CentOS 6.7 server installed with Gnome 2.28.2 that is not allowing users to switch sessions. Users can log in and click on the "Switch User" option on the menu (or "Lock Screen"). The lock ...
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1answer
69 views

Why is Desktop directory added to user home folders?

The server is running Centos 6.6 with no GUI and no desktop. The users are created with: useradd -d /users/$MY_USERNAME $MY_USERNAME I am admin but also have a user account. Even if I delete the ...
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0answers
48 views

Configuring my Bridged Network on a CentOS Virtual Machine

I am having trouble configuring my Bridged Network Connection on my CentOS 6.7 Virtual Machine. I am trying to run a R Shiny-Server Web Application on this Virtual Machine. When I try to go to ...
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1answer
298 views

How to implement Let's Encrypt for CentOS / Apache

I am running CentOS 7 and apache 2.4 and would like to implement Let's Encrypt. What is the process for this?
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1answer
34 views

Batch renaming JPG filenames in CentOS 7

I have about 80 of these files in my directory. -rw-rwxr--+ 1 vagrant vagrant 38122 Nov 13 12:19 CRMPicco RFC16 Women's 80.jpg -rw-rwxr--+ 1 vagrant vagrant 101286 Nov 13 12:19 CRMPicco RFC16 ...
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57 views

Suexec failure with Apache and PHP-FPM configuration

I'm using Apache2.2 and FastCgi to run PHP code (with php-fpm). My FCGI config is the following and works fine: User apache Group apache LoadModule fastcgi_module modules/mod_fastcgi.so ...
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0answers
48 views

Centos 7 server unable to reach outside network via hostnames

I have a Centos 7 server setup with multiple NICs and an internal DHPC server via dnsmasq. Everything was working fine until yesterday. I want to connect some VMs to the internal DHCP server, so I ...
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1answer
67 views

Trouble installing Teamspeak3 server on VPS (Says server is running but can't connect)

I'm trying to install teamspeak3 server on my VPS (CentOS 7). Everything seems to be installed correctly, it says the server is running when I try to run the startscript again, however I can't connect ...
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1answer
129 views

Tor hidden service settings failing to allow tor.service to start on CentOS/Fedora

I am attempting to set up a Tor hidden service on CentOS 7 (with systemd), using the tor package from the EPEL repository. Previously this was working fine until a few days ago when it stopped ...
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1answer
47 views

Cannot connect with public/private key between different version of openSSH

I generate public/private keys to connecto to server with ssh without write password every time. I'm using: Client: Debian GNU/Linux 8.2 (jessie) with Kernel 3.16.0-4-amd64 OpenSSH_6.7p1 Debian-5, ...
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3answers
108 views

what happens when you have 2 network interfaces to the same network in a Unix/Linux OS?

What will happen if you have 2 network interfaces to the same network where the default gateway/router is? e.g network interface e1000g0 - 192.168.1.50 network interface e1000g1 - 192.168.1.51 ...
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0answers
46 views

Try to ping google, get virginmediabusiness

I'm currently trying to set up a Centos virtual machine for development work. As it's meant for testing server side code I really don't want to have to install a desktop component and have so far ...
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0answers
14 views

Install browser on Fully Automated Nagios

After installing and using Fully Automated Nagios I am wondering how to install a browser. Right now I only have access to cli. Fully automated nagios is build on centos, but doesn't have the gui ...
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0answers
17 views

Clipboard Stopped Working: Centos 6

I have a client in my office that's running CentOS 6.x that's experienced a curious GUI malfunction. Basically the clipboard has stopped accepting output system wide. For example in Gedit "ctrl+C" ...
1
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1answer
67 views

Hosting a Server on a CentOS Virtual Machine - Bridged Connection?

I have a Virtual Machine (VMWare) running CentOS 6.7. I am looking to host a Shiny Server for R, with which I am deploying a Web Application on my corporate network. I think that I need a Static ...
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1answer
239 views

bash: /home/user/.bashrc: Permission denied when try to change user from root to user

I'm on centos, when I login as root and use su x to change user to x, it shows this: bash: /home/x/.bashrc: Permission denied I try to source ~/.bashrc but nothing changes and I also tried following ...
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23 views

Removing a Duplicate UEFI OS Installation

So, I accidentally installed two UEFI partitions to my computer. One of them handles dual booting between windows and a slackware partitions. The other one controls access to a Centos installation. I ...
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1answer
23 views

How do I allow incoming TCP Traffic on a Port in CentOS 6.7?

I am trying to configure a R Shiny Server on CentOS 6.7, and I need to allow incoming TCP traffic on Port 3838. I am new to Linux and was wondering how I can modify my settings to allow incoming ...
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1answer
1k views

Fail to start iptables.service: 'No such file'

I'm trying to directly use iptables instead of firewalld to manage firewall rules. However systemctl start iptables prints: [root@centos-new ~]# systemctl start iptables Failed to issue method call: ...
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0answers
10 views

Can I do configuration when installing package using yum?

Some programs can let the user define where to put the log file instead of putting it into /var/log/xx. However /var/log/xx will be created because in installation yum does not give me any chance to ...