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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3
votes
3answers
343 views

Software RAID 10 Array Space Loss

I purchased a dedicated server from a hosting company for a forum I am starting and the drives are configured as 4 x 64GB SSD's in a RAID 10 software array. The total amount of space I was expected ...
5
votes
1answer
1k views

SELinux is preventing /opt/google/chrome/nacl_helper from getattr access on the file /etc/passwd

Is this a bug or a real security concern? It appears to have been discussed but I still don't understand why this is happening and what is being done to address the root cause (I am not going to ...
1
vote
0answers
155 views

Run 2 instances of xinit with output to separate video out

I have a video card with 2 video outputs. I want to run 2 instances of xinit and draw 2 different displays. I want one display to be output to one video out and the other to go to the other video out. ...
1
vote
1answer
159 views

Install nemiver in CentOS 7

I am trying to install nemiver debugger in my CentOS machine. I followed the instructions listed here: Walkthrough. I got stuck however because despite the successful installation of gtksourceviewmm-...
0
votes
1answer
406 views

Failed to create local repo in CentOS

I'm trying to create a loca repo in Centos 6.6, so: I created the file: [local] name=Centos $releasever-$basearch baseurl=file://var/pub/rpms gpgcheck=0 enabled=1 Then: mkdir /var/pub/rpms cp -r /...
1
vote
1answer
2k views

CentOS 7 - why the service file is not working to run my bash script?

How to make my bash script as service in CentOS 7? following is failing. $ cat /etc/systemd/system/mybash.service [Unit] Description=mybash Service After=network.target [Service] Type=simple User=...
1
vote
1answer
2k views

how to make LVMs at available boot? kernel panic - dracut cannot find logical volumes after kernel upgrade in CentOS 6.6

I have a centoOS 6.6 vmware vm that I ran yum update on which upgraded the kernel after reboot, I started getting this: dracut Warning: No root device "block:/dev/vg_myhost/lv_root" found dracut ...
0
votes
1answer
66 views

Safely updating packages on Centos and custom compiled applications

I've inherited some Centos servers (6.2) that I want to get up to date, we have one dev machine. I'm starting off on the dev machine going through updates with security amendments, and applying ones ...
0
votes
1answer
161 views

CentOS Postfix changing mail server

I've been using Postfix on my CentOS 6 Server on it's default install settings but I would like to configure it to use the mail server from my existing email. I altered the /etc/postfix/main.cf file ...
1
vote
0answers
262 views

SSD installed, but shows as HDD in command output

Strange issue here. I have a 480GB SSD drive installed in this server. I installed it myself. I see it, it's there. But, I'm getting an incorrect output on a typically used command to determine if it'...
1
vote
2answers
157 views

Test script/program/app to check if my website is live

I just deployed my webserver using Apache in CentOS and I was wondering if anybody has any good ideas in how to check every specified amount of time if the server goes down and then I can use postfix ...
1
vote
1answer
1k views

ffmpeg -acodec copy does not copy all audio stream to the new container

I wish i can find ffmpeg help here at stackexchange. I'd been re-encoding old videos to libx264 to save up some storage space, as I thought it should be working based on documentation seems failing to ...
0
votes
0answers
58 views

scp from a remote machine

I am having trouble moving files off a remote machine that we need to take down. I can SSH into the remote machine just fine but, when I try to scp the files out I get an connection timed out on port ...
3
votes
1answer
2k views

Apache (httpd) failing to start on boot - CentOS 7

i've just installed CentOS 7, so still getting to grips with it, but can't seem to figure out why Apache won't start on boot. I have enabled the service via systemctl, and if I start it manually then ...
1
vote
1answer
495 views

Install CentOS 7 through IBM IMM2

I'm trying to remotely install CentOS 7 (using the "Everything ISO" from official download page) on an IBM server with IMM2 (Integrated Management Module 2) using the Remote Control single-user mode ...
1
vote
1answer
355 views

AWS Outbound ACL Rules impact on incoming ssh connections

I am making a bastion ssh server on CentOS 7 in an AWS EC2 instance. When I use the following rules in its ACL, I am able to connect to the server just fine: Inbound Rules Allow traffic on port 22 ...
1
vote
1answer
102 views

Systemcrash suexec forkbomb.sh ulimits

I got this script named fork.sh: #!/bin/sh forkbomb() { forkbomb | forkbomb & } ; forkbomb If I call it through suexec my whole system will consume 99% cpu. To prevent a normal bash forkbomb I ...
1
vote
1answer
2k views

Intel 6300 wireless card won't work on CentOS 7 - worked during install though!

I installed centos 7 on a laptop with an intel 6300 wireless card in it. During the install, the wireless card was available and I was able to connect to my lan. After the install, I don't see the ...
0
votes
1answer
606 views

CentOS 7 - while installing i set disk encrypted with password, but on reboot always it asking password

While installing CentOS 7, i put password for disk encrypt. Now while working remotely on that machine and doing reboot it always ask password to be inserted on-site. Is this normal? or there is a ...
1
vote
1answer
230 views

Files in folder /run/udev/data

Does someone know, when and how the files in this folder /run/udev/data are generated. I ask because I have a program, which needs udev in jail. But the version in jail is newer (version 208) than ...
1
vote
0answers
291 views

Using Cgroups with Systemd to restrict bash cpu & memory

I want to restrict every user on my Centos 7 server who is logged in via SSH. They should not be able to use, for example, a forkbomb and kill the whole system. The superuser will have no restriction. ...
1
vote
1answer
696 views

Connect to Samba Share across OpenVPN tunnel

I've recently setup OpenVPN for remote connection to our CentOS 6 file server. Server Static IP: 10.0.0.66 Remote OpenVPN IP: 10.8.0.1 However when using the OpenVPN connection I am unable to ...
2
votes
2answers
471 views

Problem to Install CentOS 6.4 (Second) after that Win7 (First) - dual boot

I want to install CentOS 6.4 in my PC, this image shows my Windows 7 partition before to install it But when I was ask to select my option (mode) of install CentOs like this: Or this (really is my ...
4
votes
5answers
199 views

How can i find out what is taking space on my system

I am trying to find out what files/folders are using most space on the filesystem df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 94G 85G 4.4G 96% / tmpfs 16G ...
0
votes
2answers
110 views

Setting up a static IP from ISP

I think my question might be an easy one but i struggle a little with setting up servers. I have a CentOS 6 setup. I have added Webmin and Virtualmin. I set this up with a static IP address and had ...
4
votes
3answers
8k views

Installing VBox Guest Additions when there is no X-server

I'm using Virtual Box on my windows 8.1 host machine. I have installed CentOS & Ubuntu in 'Graphical Mode' and had sufficient practice. But now I wanted to switch to 'Command Line Mode" completely....
-1
votes
1answer
732 views

what is difference between /usr/lib and /etc/systemd?

Before all the unit files were in /etc/systemd/system/ but now some are showing up in /usr/lib/system, what is the difference between these folders?
0
votes
1answer
331 views

Fix version issues of Python on CentOS 6.6

I'm very new to Linux and Python as I am an intern, please bare with me. If I'm missing something then let me know I can update the post. I installed python 2.7.9 under a users directory on centOS 6....
0
votes
0answers
404 views

Centos 7 x64, RT3290

I use Centos 7 on Asus X550L uname -a Linux egor 3.10.0-229.4.2.el7.x86_64 #1 SMP Wed May 13 10:06:09 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux lspci | grep -i network 03:00.0 Network controller: ...
0
votes
1answer
226 views

Centos 7.1: how to record from audio input (not microphone)

I use centos 7.1. What application can I use to record audio input (not microphone) from sound adapter? For example I connect TV sound output to PC sound card input.
0
votes
1answer
3k views

No IP address on VMware running centos 7

I just now installed Cent OS 7 on my VMware 8 and I am not able to connect it to a network. I checked the VM network and its mapped to the physical NIC. The same setting work like charm on my CentOS ...
1
vote
0answers
126 views

how do I migrate liferay from one server to another?

I'm trying to migrate liferay to another server (both are linux machines, and I'm using the CE bundle with tomcat7). I moved over the entire folder. This is not enough, because usernames/passwords ...
0
votes
0answers
155 views

git add . error on dedicated server; fatal: Not a git repository

I was able to initialize a git repo on a directory containing one of our websites, but when I try to git add . I get this error: fatal: Not a git repository: /space/apache/vhosts/prestastore.com/...
1
vote
1answer
1k views

Can anyone please help debug these ata error messages?

my Centos 6 server has been playing recently in that it seems to freeze up and lose network access. I've been getting a load of ata5 error messages in the log and after some digging have determined ...
-1
votes
1answer
252 views

Ping to LAN address takes an incredibly long time?

I'm running CentOS 7 in a lab environment with one domain controller (DC - Windows 2012R2) which serves as a DNS and DHCP server as well. CentOS is joined to the domain; it can ping the DC and a ...
0
votes
1answer
127 views

Volume Group fails to recover

For the last 10 days I've been living a nightmare trying to recover my data. I'm trying to recover VG and mount it to access the data here's what I get [root@]# pvscan Found duplicate PV ...
2
votes
0answers
937 views

Exundelete can't restore the file

I'm trying to restore 2 important tar.gz files I know their directory but extundelete not restoring them although it's giving me the inode number. Loading filesystem metadata ... 2127 groups loaded. ...
1
vote
6answers
893 views

I can not install MySQL using yum on Centos7

I've installed centos7 recently, but, when I am trying to install MySQL using the command: yum install mysql-community-server I keep getting Exiting on user cancel while I am not hitting any ...
0
votes
1answer
355 views

Problems Setting Up DHCP Server On CentOS 6

I have been trying to set up a DHCP server on CentOS 6 running on an Intel NUC i7. I have installed dhcpd and am using the example dhcpd.conf subnet 192.168.1.0 netmask 255.255.255.0 { option ...
1
vote
2answers
229 views

Centos 7 - Recover mysql db from data files .frm and .ibd

I have migrated my operating system from Windows to Centos 7 without getting backup of mysql through mysqldump. Now I have mysql data files .frm and .ibd . I want to migrate them How can I migrate ...
2
votes
1answer
149 views

upgrade chroot version on centOS 5?

How do I upgrade chroot release on my centos 5 server? I want to install a service that uses a new capability available in later versions (--userspec) of chroot and I can't find any documentation of ...
0
votes
2answers
190 views

Unable to mount Volume Group [closed]

2 drives connected externally to a new server both are merged using LVM as one drive. vgscan Reading all physical volumes. This may take a while... Found volume group "vol_grp1" using metadata type ...
3
votes
1answer
846 views

How to tell systemd to start sshd later in the boot sequence?

My sshd_config file specifies it should listen on some specific IP addresses instead of on all IP addresses. The problem is that one of these NICs doesn't come up until later in the boot sequence. ...
0
votes
2answers
234 views

Centos 7 Drivers issues on HP sleekbook 15-b001ee

I am fresh to linux and centos. I have installed centos with GNOME desktop successfully but after signing to my account couldn't find Sound and Wifi working. I have google a lot but everything is ...
0
votes
0answers
209 views

Subversion // installed and set, but fail to connect

I aim to get my own SVN server. I installed Subversion, all had been ok. I configured it <Location /myrepo> DAV svn SVNParentPath /svn/adlsvn #For any else ...
0
votes
2answers
161 views

CPanel / WHM // CentOS // SELinux

The file config indicates SELinux mode is "target". Is it enabled or disabled ? Terminal/SSH says 'disabled'. But several behaviours here and there act like it is enabled. Thanks.
5
votes
3answers
11k views

CentOS 7 - Rename network interface without rebooting

I'm renaming network interfaces by modifying the files in /etc/sysconfig/network-scripts. eth0 -> nic0 eth1 -> nic1 The content of the network scripts looks like this, after modification: # cat /...
0
votes
1answer
3k views

“yum-config-manager --disable <repoid>” How to get repoid for centos 7?

I mistaken installed centos7 minimal. But I want to install GUI for Centos 7.From this link, I try the following commands: yum groupinstall "GNOME Desktop" "Graphical Administration Tools" But It ...
1
vote
1answer
2k views

TFTP times out in CentOS 7

I have an isolated server that telnets into the single device on its network and loads a file to it using the telnet command load. I am trying to recreate the functionality on another PC. The old ...
2
votes
0answers
73 views

recover lvm formatted partition

I had 2 old drives having LVM installed showing as 1 drive. They were attached by the datacenter to the new server to migrate data but they weren't able to be mounted I tried everything possible until ...