CentOS is an Enterprise-class Linux Distribution derived from Redhat Enterprise Linux sources freely provided to the public.

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What does “4m[terminated]” mean after restarting CentOS?

After installing CentOS 7 and restart it, it always promptd "4m[terminated]". After googling, I can't find the meaning of this phrase. What does this prompt mean? Will it affect normal OS functions?
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172 views

CentOS 7 - ssh login is refused when i use ssh public key, but only works with username password

I am not able to login via SSH key. I place my id_rsa.pub key in the /root/.ssh/authorized_keys [root@s .ssh]# ll total 4 -rw------- 1 root root 403 Jun 8 00:44 authorized_keys [root@s ~]# cat ...
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41 views

How to install CentOS 6.6 linux on an OCZ RevoDrive3 X2 PCI SSD

This took me a week, so here's the problem, and solution. From CentOS 6.5 onwards, the driver mvsas.ko recognizes the OCZ SSD... wrongly. It shows up as 4 small slow SSDs, instead of one big fast ...
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96 views

Install php apache module from source in CentOS 6.6

I tried running yum install php on my centos box however it kept installing an older version. Therefore I installed apache 2.4 and php 5.4 from source. However, I'm not sure how to install the ...
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3answers
137 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 ...
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1answer
294 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 ...
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0answers
57 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. ...
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1answer
30 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 ...
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1answer
50 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 ...
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1answer
105 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 ...
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130 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 ...
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1answer
22 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 ...
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43 views

trouble with installing php-gmp on centos with whm

In order to use blocktrail sdk https://github.com/blocktrail/blocktrail-sdk-php I need to install php-gmp. I installed it on one server using yum successfully. But the server I need to use is ...
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1answer
56 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 ...
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108 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 ...
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2answers
62 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 ...
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51 views

Mod Speed Installation Error

I have 2 webservers Apache and Nginx. Trying to install mod_speed integrated with Apache but I get error: Failed dependencies: httpd >= 2.2 is needed by ...
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0answers
9 views

centOs 7 Bind 9 pki directories what is the purpose

i would know what is the use of this directory, because he caused some bad behaviors(permissions issue) with the named-chroot service. So i would know why named-chroot need it to start. he contains ...
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1answer
63 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 ...
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0answers
51 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 ...
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0answers
117 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 ...
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1answer
76 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 ...
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1answer
72 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 ...
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1answer
49 views

Systemcrash suexec forkbomb.sh ulimits

i got this script named fork.sh: #!/bin/sh forkbomb() { forkbomb | forkbomb & } ; forkbomb if i call it trough suexec my whole system will consume 99% cpu. to prevent a normal bash forkbomb i ...
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1answer
154 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 ...
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1answer
95 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 ...
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1answer
60 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 ...
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70 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. ...
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1answer
46 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 ...
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2answers
82 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 ...
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5answers
92 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 ...
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2answers
54 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 ...
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2answers
417 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" ...
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1answer
48 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?
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183 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 ...
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28 views

CentOS samba connection over an OpenVPN network

I have a CentOS 6 server that I am connecting to via OpenVPN and I would like to know how to get a Samba share working so I don't have to keep using ssh terminals. After I connect to the CentOS ...
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131 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: ...
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51 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.
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83 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 ...
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41 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 ...
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99 views

fail to start graphical.target on centos7

could not start graphical target after installing kde from minimal centos. startx works fine though. the system has two vcpus and 1GB ram. $ cat /etc/redhat-release CentOS Linux release 7.1.1503 ...
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49 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: ...
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0answers
21 views

Remove or decrease JAVA Security openjdk AWS centos instance

How to decrease or remove java security level in CentOS openjdk? I tried removing the java security level but I didn't find any option, my OS is in an ec2 aws machine.
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1answer
125 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 ...
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53 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 ...
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1answer
53 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 ...
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94 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. ...
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3answers
95 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 ...
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1answer
53 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 ...
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2answers
61 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 ...