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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Opening a file with Atom causes Xvnc to crash

We have some CentOs 7 VDIs and this problem is only happening on one of them. Whenever the user tries to open a file on Atom (v1.3.1), the Xvnc crashes (segment fault) and kicks him out. This is what ...
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160 views

Block IP Fragmentation attack using iptables

I am trying to stop all MF flag packet which has more fragment big set. because i have seen many IP Frag attack taking advantage of it. I know its not a good idea to do but, I have test my application ...
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189 views

Create CentOS-7.1 custom iso with upgraded kernel-4.2.6

I am trying to create CentOS-7.1 custom ISO with kernel-4.2.6. But I am facing issues while installing. Please see attached image for details. I have followed the following steps to prepare a custom ...
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50 views

Linux, LAMP, & Nagios server

as i'm somehow new in linux, and i'm required to install a monitoring system to our company using CentOS7 with LAMP & the monitoring Application NAGIOS. after installation everything goes well, ...
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45 views

How to rebuild a Centos base application iso?

I have a centos6.5 based application iso file which I want to change one of the RPM file and change some configuration in post kickstart file (there is a post kickstart file is in separate folder)and ...
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176 views

yum error on centos 7 vm with proxy authentication

I have installed CentOS 7 in VirtualBox on my Windows 10 system. My Windows system uses a proxy to connect to the internet. I have set up proxy settings in CentOS, through network manager and I can ...
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358 views

sudo and su hang indefinitely… stumped

I am trying to run su or sudo on my CentOS 6.6 machine. Every time I try to execute either command, I get prompted for a password. After entering the password, the command simply hangs. I can ctrl+c ...
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21 views

have very recent packages in CentOS

Normally versions of packages available in CenOS and Ubunti repositories differ, Ubuntu tends to have the latest-greatest versions, while CentOS is more conservative. Is it possible to add some repos ...
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28 views

centmin mod setup Domain Nameserver

I install centmin mod on my VPS. (ex. IP VPS 49.49.49.49) then i select option (2) to Add Nginx vhost domain then i create 2 vhost mydomain1.com and mydomain2.com. add my domain panel, there's 3 ...
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35 views

Disadvantages of certain filesystems when using a HDD in a Samba server?

I have found that using an NTFS drive in a CentOS 7 based Samba/FTP server is not so good, as after a few months of use, I was greeted with numerous read errors which required me to manually remove ...
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178 views

How do I install driver for the Linksys WUSB6300 in CentOS

I want to install the WUSB6300 driver in CentOS. I found good information for Ubuntu here: driver for WUSB6300 in Ubuntu However that did not get me anywhere since the C code did not compile in ...
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94 views

Trying to install CentOS 7 Server with manual partitioning but GUI is very different from CentOS 6

When I installed on CentOS 6, to get a "headless" or command-line only server with the manual partioning I wanted I went through the below steps: Choose "Install with basic video driver" Choose type ...
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142 views

Apache httpd starts but enters failed state on CentOS 7

I'm new to Linux and i have some problems with restarting httpd after creating Virutal hosts. The service is running but i am unable to restart it. [webmaster@erichermansson conf.d]$ sudo systemctl ...
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66 views

TFTP is not working on this server/

I am running a centos 7 VM. This server is running a cruciblewds deployment. This uses tftp to serve the boot image to the computers. The server was running just fine, and then it quit working. I am ...
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22 views

Linux networking in VM ware

I have a doubt in Linux networking in VM ware. I have VM ware and i installed three Cent OS in them. I would like to network them all in a local LAN in VM ware itself. One among these three VM ...
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103 views

Unable to zoom-in Munin graphs on CentOS

I have installed munin on my CentOS 6 system. The installation procedure is as follows: rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm yum --enablerepo=epel ...
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70 views

linux to linux IP MASQUERADING failed (can't ping ip server)

I'm new in linux, i'm trying to IP MASQ. So the diagram is like linux A is connected to HUB and Internet, and linux B is connected only to HUB. In linux A i have eth1 (10.10.10.5) and eth0 (192.168.1....
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50 views

xalan-c on CentOS 7 32 bit

I downloaded a 32bit version of CentOS from https://wiki.centos.org/SpecialInterestGroup/AltArch/i386 For a script, I need xalan-c. When I search for xalan with yum search all xalan, I get this ...
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26 views

Apache PostreSQL database server only

I was wondering if it's possible to use apache to make a postgresql database available for connections from the web without using a website to interface with the database. Instead of having a webpage ...
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46 views

PostgreSQL ssh connection from outside network

I have a PostgreSQL Server (CentOS 7) running on the network, it is set up to allow remote connections which works from inside the network. Any computer on the network can connect to it using ssh -L ...
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74 views

Reset time / date to current time-zone using timedatectl preferably, or date

As the title says, I'm looking to reset the current system time to the selected time-zone using the timedatectl preferably, or date command. This is on the CentOS 7 OS, hence the timedatectl ...
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50 views

How can I improve this script to install pptpd & csf on a Centos 6.5 openvz box?

I'm working on a script to ease the deployment of pptpd and csf on openvz boxes. Here's what I've got so far: echo "Installing epel repository, wget, and bind-utils..." yum -y install epel* yum -y ...
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118 views

No sound output in Phonon on KDE

I'm running CentOS 7 on an Intel i7. No sound output in headphones in front jack or headphone jack on monitor while using HDMI cable. I do get sound output in audio hardware setup but not in device ...
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50 views

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 (3.10.0-229.14.1.el7....
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118 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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44 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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41 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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105 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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124 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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62 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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47 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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84 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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74 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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36 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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170 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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196 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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39 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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75 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: http://...
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43 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: fe80::...
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264 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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90 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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164 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 images....
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100 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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166 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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596 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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39 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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39 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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42 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 ...