Questions specific to the CentOS Linux distribution. Use this tag if your question relates to how the CentOS distribution affects your problem; do not use it if you just happen to be using CentOS and your question is about a specific configuration detail or syntax.

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Grub2 displaying 4 entries after CentOS7 update

I'm new to CentOS, but I'm familiar with general Linux command line. After installing CentOS, I ran "yum update" as root and now my grub displays 2 more entries: CentOS Linux ...
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112 views

CentOS 6.7 x64- Desktop Edition— Restore Gnome Panel Default Config Settings

CentOS 6.7 x64 Desktop Edition I accidently deleted gnome panel which present in the bottom, which has network icon, volume, terminal, desktop,kick off application launcher etc. The below link for ...
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43 views

CentOS 7 VM small text issue at High Resolution

I recently created a CentOS 7 VM in order to prepare for the RHCSA 7 exam (since they are both based on Fedora and are quite similar, I decided to opt for CentOS 7 as it is free, and RHEL isn't). In ...
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39 views

Unable to install CentOS in virtual machine on Windows 7 64-bit platform? Please give me suggestions

I am unable to install CentOS in virtual machine on Windows 7 64-bit platform. Please give me suggestions... My laptop is a recent Lenovo G50 pentium Quad core. 4GB ram. I want to use it because ...
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97 views

CentOS 7 On Thinkpad SL300 missing Wireless NIC (SOLVED)

I installed CentOS 7 on Thinkpad SL300. According to specifications on Lenovo website and linlap.com, my wireless card should be Intel somthing. What did I found with lspci is that I am using Qualcomm ...
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108 views

CentOS 7 won't work with Dell Powerconnect stack with port channel

I have two stacked Dell N4000 series 10g ethernet powerconnects and a Centos 7 server that I'm trying to bond two 10g ports using LACP. I'm trying to setup LACP but I get no packet flow when I put my ...
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436 views

CentOS 7 Custom Install: Error populating transaction

I used the search function and came up with this existing thread on this same issue that amazingly happened about 3 weeks ago. CentOS 7 Install: Error populating transaction . My issue is very, very ...
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57 views

Many IPs from different Subnets and Gateway to one machine

I use CentOS 7.1 and I have more then two IPs attached to one machine, which is on Cloud (KVM). The IPs are from different Subnets and Gateways. To work all I must delete all "ip route" saves, except ...
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45 views

Trying to set up Amanda on CentOS 6.7 using USB-over-Network to connect to remote DAT72

I have an HP DAT72 USB tape drive connected to a Win workstation, and am running FabulaTech's USB over Network. I have a CentOS 6.7 VM running the Linux client for UoN. I can connect to the remote ...
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77 views

Trying to understand CentOS - Out of date software?

First, please excuse my poor English, it's not my native language. I'm a user of CentOS 6 in a VPS and, after months of use, I still have some basic questions. For example, I use PostgreSQL version ...
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72 views

CIFS more slowly on CentOS 7.1 than on CentOS 6.6

I've installed to clear system on ESXi First - CentOS 7.1 Second - CeontOS 6.7 Mount windows share with CIFS. Tried to copy share from windows to linux server. On CentOS 7.1 when i'm coping the file ...
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33 views

how do I virt-install a guest from a dvd?

On a CentOS 7 host server, I would like to create a guest virtual machine with CentOS 7 as the guest operating system. I have a CentOS 7 installation DVD that was burned from an iso file in windows, ...
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143 views

Open port 1935 on CentOS 7

I am attempting to stream to port 1935 on CentOS 7. However, when I run the ffmpeg encoder to stream to the rtmp server on same machine I get Connection refused. I have added port 1935 to allow in ...
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182 views

CentOS installation of new kernel

I have a remote Server with OVH where they have their customized kernel which is causing us a problem while installing our software using CentOS 5.10 While applying the procedure to install the ...
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24 views

CentOS PV Guest's Process List Ports

I have created a Pv Guest in CentOS. I'm using libvmi in order to get the process-list of the Pv Guest. However, the process-list of the Pv Guest does not show the ports of it. The process list, lists ...
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34 views

What's the equivalent of “rmtrash” on Centos Linux?

On Mac OS X, I use rmtrash package and command to more safely delete files. Is there an equivalent of that on Centos Linux?
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71 views

Closing lid on HP CentOS7 laptop freezes even with “HandleLidSwitch=ignore”

I have an HP Zbook laptop with CentOS7 installed. It works fine by itself, but I wanted to connect it to an external monitor and close the lid. I found the following, which provides some info: ...
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41 views

bridge does now work in Xen-4.5.1 on centos

I installed Xen-4.5.1 on CentOS6.5 and create a bridge "xenbr0" and modified ifcfg-eth0 at the same time. ifconfig eth0 Link encap:Ethernet HWaddr 00:1E:67:12:83:B4 inet6 addr: ...
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241 views

Centos 7, protect single user mode [systemd vs init]

Since Cento7 & RHEL 7 started using systemd inplace of init inittab there are no use /etc/inittab & /etc/sysconfig/init to password protect single user mode Question is now where we can find ...
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83 views

why can't I partition a LUKS mounted partition?

A CentOS 7 server has to have LUKS encryption for everything but /boot and /boot/efi. And the large LUKS encrypted remainder partition (1.8 TB) will then need to be partitioned further. I was able ...
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150 views

Why got 500 internal error after upload images into server using TinyMCE editor with Codeigniter3?

I'm using TinyMCE4.2 editor to edit my post for website with Codeigniter3 however I've also used Responsive filemanager to create images upload and manage images with sub folder of each file or ...
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94 views

Set Grub2 boot loader as a default boot loader

I have windows 8 and CentOS 7 on my machine, Every time I'm booting my computer with Windows 8, It sets it's boot loader as a default and whenever I boot from CentOS it sets it's boot loader as a ...
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165 views

Kernel Panic - not syncing : Attempted to kill init

Cloning a hardware image using clonezilla at VM Workstation and getting the following error. I am able to boot the system using rescue CD , but don't know how to proceed.
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540 views

CentOS 6.7 hangs after progress bar

does someone has been in this problem with CentOS 6.7 ? X does not finish to complete.. missing icons and menu. What I already did: 1) Install nvidia drivers 2) Uninstall nvidia drivers ...
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38 views

yum updated bind last week. Afterwards, ping, yum update, lynx stopped working

Per title I issued a standard yum update 10 days ago. The only packages updated were php and bind. Afterwards, the network went bonkers. yum update stopped working (couldn't resolve address), I can ...
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35 views

Connecting Shrew using terminal

I am using Shrew in CentOS to enable VPN tunneling. I use the following to start it. iked qikea Now I want to enter username and password also from terminal. I don't want to use the GUI so that I ...
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16 views

Get 'Pictures' folder in changing wallpaper window

I am using CentOS 6. When i tried to change the wallpaper of the system it was showing a list of images already available. Can someone tell me the directory in which those images will be stored for ...
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41 views

Creating filesystem using vdx

Im attaching a generic volume and would like to create file systems within the volume partitions... Linux flavor:- Centos command - /usr/sbin/mkfs.ext4 /dev/vda So, can someone explain what is the ...
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302 views

CentOS hangs after installing CUDA 7.5 + Nvidia 352 driver

I am having a very hard time getting the nvidia driver to work with CentOS 7. I have a GTX 960 which I run my display off of (I also have a GTX 720 which I just use to debug cuda apps but it is not ...
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102 views

Centos 6 KVM network problem

I have a Centos 6 KVM host. I installed the KVM following this manual: https://wiki.centos.org/HowTos/KVM Its network has been configured as a bridge: [root@server ~]# ifconfig br0 Link ...
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56 views

Can't log into Centos

I have a CentOs 6.5 mail server which was compromised and used to send spam therefore forcing us to do some hardening. I followed enter link description here hardening tutorial to the letter which ...
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28 views

Error installing Zoiper in CentOS virtual machine

I'm trying to install zoiper on my CentOS virtual machine but when I finish installing it, this pops up and zoiper terminates:
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26 views

Terminal Crash after upgrading from centos5.9 to 5.11

I had installed Centos 5.9 in my x86_64 system and I installed update yesterday. Just now after I initiated the system, I found it has been upgraded to centos 5.11. But the bad thing is now I cannot ...
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44 views

cant access php info page

very new to Linux here and having some trouble getting going. I have installed Apache, PHP, and mySql. Im trying to show the phpinfo page. In my /var/www/html directory I have created the phpinfo.php ...
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21 views

centOs -install PPTPD on CentOS stuck on applying firewall rules

I've a centOs 6 and I want to install PPTPD vpn on it . I read this article and tried it http://etapien.com/guides/how-to-install-pptpd-on-centos-vps/ When I run ./pptpd6.sh comment to install it , ...
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32 views

Monitoring dashboard for a custom application, should also allow custom actions

I have a custom application, for which I need a dashboard which will monitor the application (show if the application is up/down) and allow an operator to start/stop the application from the ...
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27 views

Replicate CentOS server to AWS

Have a CentOS 6 LAMP web server currently running on on-premise hardware. I'd like to replicate or image this server to a VM in AWS for backup purposes. Is this possible? If so, what tools would you ...
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16 views

How to create Cent OS 6.5 DVD with the 3.10 or 4.0.1 Kernel?

The Cent OS 6.5 comes with a old 2.x kernel. I would like to build new kernel for it(3.10 or 4.0.1) and re-package it with the Cent OS 6.5 OS DVD. How can I do this?
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31 views

X11 Server Cap Lock and scrolling problems on CentOS 6

I am having problems with the cap locks key, when using vncviewer to remote on to a CentOS box running X11 v0.9.13-8. I cannot upgrade the x11 as i'm stuck on CentOS 6. The problem is that the Cap ...
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20 views

Is it possible to install centOS 5.7 over NFSv4?

I have an NFSv4 server running on RHEL 7 and need to PXE boot some machines that require CentOS 5.7. Considering that the older distro's can normally mount NFSv4 locations by specifying t=nfs4 I ...
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206 views

configure command line mail client in centos 7

I have installed mutt. .muttrc file is not located in home directory Need to configure mutt as mail client where as mail server is MS exchange server. Error Message : Diagnostic-Code: X-Postfix; ...
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125 views

Can't enable network adapter

I just installed CentOS 6.7 basic server on my z97a gaming 7 4970k. I can't get the network to work. ifconfig only shows lo. ifconfig -a only shows lo. I tried to create the eth0 and resolv.conf files ...
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174 views

Can't compile php 5.3 on Centos 6

I need enable php-fpm on php 5.3.29 to Centos 6, I have this error while running the ./configure script: ... config.status: creating sapi/fpm/php-fpm.conf config.status: creating ...
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33 views

Config folder for a service

Context When running the Deluge daemon (deluged) as a service, you can specify an option to where the config folder will be created. The deluge-user I've created, is a system account, and therefore ...
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117 views

How do I increase my network perform on Centos 7

I am doing some research and I find that I have to configure the sysctl.conf file if I want to increase the network performance. So, I want to configure the default maximum Linux TCP buffer sizes ...
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65 views

Linux capabilities for java to resolve symbolic links

I run a java program by a non-root user. The program has to resolve a symlink to the real file name, but the link is owned by a different non-root user. I used setcap to set capabilities to open ...
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140 views

build memcached source on centos6.4 64bit fails

I'd like to build memcached from source on centos 6.4 x86_64 but only get following error. checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu ...
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146 views

replacing windows 8.1 with CentOS 7

A new computer came pre-installed with Windows 8.1. It is an Acer Aspire T desktop. I would like to completely erase windows 8.1 forever from the machine, and replace it with CentOS 7. How can I ...
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64 views

Installing foreman 1.9 configuration help

I can't seem to find the answer that I am looking for so any help here would be hugely appreciated. I am doing a POC with foreman 1.9 on a CentOS7 server. Our infrastructure as it stands right now as ...
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232 views

CentOS 7 installation falls back to text-mode on Parallels Server Mac VM

Every time I am trying to install CentOS 7 in Parallels Server Mac, the installation wizard falls back to text-mode. I am getting this error: X startup failed, falling back to text mode ...