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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0answers
85 views

How to recover an Intel RAID 0 on a Rocks cluster distribution

We had a Rocks 5.5 distribution on our cluster and wanted to upgrade to 6.2. The "/export" partition was mounted on a Intel software RAID 0 array of 2 identical hard drives (HD) (/dev/sdb and /dev/sdc)...
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0answers
1k views

After upgrading Centos 7.1 today, I find myself with the error kdump can't read /boot/ [closed]

After a yum update in CentOS 7.1, kdump is acting up. First off: [root@mydomain ~]# cat /etc/centos-release CentOS Linux release 7.1.1503 (Core) [root@mydomain ~]# systemctl status kdump kdump....
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1answer
494 views

Installation freezes while install Centos 7

I have an Nvidia GTX 960 and an Intel i7 CPU. I am trying to install Centos 7 from an USB drive. Originally I tried using a DVD but I kept getting an error about the linux kernel not being loaded. ...
1
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1answer
95 views

Echo outputting results in erratic order in BASH

Word of warning: I'm relatively new to BASH scripting, so any advice on my hacky scripting is appreciated. I have a strange issue, in my code I've collected a bunch of error strings from a file in ...
1
vote
2answers
623 views

FTP Troubleshooting

I have a centos 6.5 installed on Virtual Box. I'm trying to configure a basic ftp server. Below are details of it. Installed vsftpd from DVD/Yum: Status -> Successful Disabled firewall for test ...
1
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1answer
306 views

how do I manage dependencies for this manually installed rpm file?

How do I manage the dependencies while manually downloading and installing these rpm files? Googling the names of the rpm files results in differently-named rpm files. I cannot use yum install ...
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0answers
58 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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0answers
32 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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0answers
51 views

Linux PAM: add specific lib to Makefile and compile a single module

I am dealing with the development of a custom PAM module for a CentOS7 system. As starting point, I'd like to use the project linux-pam, specifically: compiling only the pam_permit module; adding as ...
3
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2answers
16k views

why can't this CentOS 7 server see wifi connections?

I recently installed CentOS 7 as the sole OS on an Acer Aspire T. There is no GUI, as it is a server with a terminal-only interface. What do I need to do to get CentOS 7 to be able to see and list ...
0
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1answer
1k views

Broadcom bcm4352 wireless on CentOS 7

I'm trying to set up CentOS 7 on a Dell Precision M3800 and can't get the wireless working - the only option under network settings is "wired". Any ideas how I can get a working driver? $ lspci | ...
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0answers
27 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 ...
0
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2answers
2k views

Apache won't restart after configuring Virtual Hosts

I am trying to make a web server, but after adding the virtual hosts config, apache won't restart. It had several errors but I've managed to fix most of them. Now I don't know what is happening ...
0
votes
1answer
95 views

Haveged service won't run (dead pid)

So my system entropy is low on my centos 6 VM. (137) and I installed haveged, Yum install haveged But when I go to start the process it instantly dies: Process is dead but sub system is locked ...
1
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0answers
394 views

Installing Docker on CentOS

I'm working through the docker installation guide. Running CentOS 7. I ran: curl -sSL https://get.docker.com/ | sh Output: warning: /var/cache/yum/x86_64/7/docker-main-repo/packages/docker-...
2
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0answers
58 views

How to create a LiveDVD from an installed CentOS?

I have an installed Centos 6.1 64 bit. We need to create a LiveDVD from it. The custom is that it has a few packages installed that cannot be found in repositories. Question: how can I make a ...
-1
votes
1answer
290 views

iptables: command not found - CentOS 5.5

I am using CentOS 5.5. I want to add new IP in my iptables. But I cannot do it. Tried everything with 'iptables'. The latest version of 'iptables' is at sbin. I'm in 'sbin' directory. But it says "...
0
votes
1answer
129 views

Connect to internet through socks proxy where local DNS does not resolve

I have a local machine with CentOS 7. There is a Socks V5 proxy server on the local subnet that provides this machine with access to the internet. I am able to download files with, curl -x --proxy ...
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0answers
23 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 , ...
0
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0answers
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 ...
0
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0answers
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 ...
0
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0answers
16 views

Centos Server - Hide gdm 3 user list [duplicate]

I have a server running CentOS 7, using gnome desktop 3. I’m trying to hide the user list and I’ve followed these steps: Edit /etc/dconf/db/gdm.d/00-login-screen and set [org/gnome/login-screen] ...
1
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1answer
39 views

What does [0x200000401:0x4:0x0] for a file ID signify

I tried to get the id(descriptor) of the file using the DFID which is defined as #define DFID "["DFID_NOBRACE"]" in lustre and got the output as [0x200000401:0x4:0x0]. So what does the fields ...
0
votes
2answers
61 views

CentOS 6.4 rpm requires el5 but available is only el6

I want to install lipXp-devel-1.0.0-8.1.el5.i386.rpm and get the error message: Package: lipXp-devel-1.0.0-8.1.el5.i386 Requires: libXp = 1.0.0-8.1.el5 Installed: libXp-1.0.0-15.1.el6.i686 ...
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3answers
1k views

Avoid overwriting of hostname by transient hostname at reboot

My server is CentOS 7.1. After reboot the hostname is overwritten by the transient hostname (mail) and I can't find a way to avoid that. Maybe AutoDNS and the MX record mail causes that? /etc/...
2
votes
3answers
2k views

From Ubuntu to Debian or CentOS

I am an Ubuntu user for some time now and I am thinking of trying some other Linux OS. After extensive search I decided to try either Debian or Cent OS. But I have some concerns: Both Debian and ...
0
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0answers
17 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?
0
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1answer
92 views

Is it possible to execute a command as another user without sudo su'ing to that user?

I do a lot of administration in CentOS6 for several teams. One of the more frequent things I do is sync down and package code as the team account, before deploying it out under my own account. Is ...
0
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0answers
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 ...
0
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0answers
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 ...
0
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2answers
86 views

When will Cent OS delete empty dirs in /tmp? [duplicate]

On our webserver, we use /tmp to store a server-side cache. The cache path is unique for each website, and also for each git revision. So when the code is updated, the old cache folder is abandoned. ...
0
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0answers
215 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; ...
1
vote
1answer
105 views

Centos 7.0 upgrade problems

I have a small system that I have been running Cantos 6.6-32 on, all is (was) well. But I wanted to update, so I installed 7.0-64. From what I read one cannot upgrade from -32 to -64, and there are ...
0
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0answers
130 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 ...
0
votes
1answer
184 views

CentOS - 7za - Extract file with password

I have a .7z file which I need to extract the contents of. The problem is, that it's password protected and currently, I have to SSH into the server and enter the password. I would like to this ...
0
votes
1answer
138 views

mail delivery goes wrong with mx lookup

in Plesk (11.5) you can deactivate mail service on a specific domain. I did this, because: At my domain provider I configured the domain DNS settings like this: A-record: IP points to web server with ...
0
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0answers
184 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 sapi/fpm/init.d....
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0answers
2k views

Bash session errors on commands: “fork: Cannot allocate memory”

I have a bash session open to a remote server and something is wrong. I created a directory "test" and touched the files inside touch 1 2 3 4 5. I then tried to copy the directory cp test/ test2/ and ...
0
votes
1answer
42 views

Mount SMB share as different volume

CentOS 6 server currently has the following volumes: /boot / Is it possible to create a new volume that is a mounted SMB share? E.g.: /nas Currently this share is mounted by fstab to /mnt/nas, ...
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votes
1answer
120 views

Generalize CentOS and Ubuntu server in VirtualBox

I want to generalize CentOS and Ubuntu server for a lab that is using VirtualBox as virtualization environment. The main objective of the process is: To create a VM with basic OS and utilities ...
1
vote
0answers
49 views

Cyrus Performance Tweaks?

Okay guys, I have put a lot of research into this so bear with me. Here's what I am up against. I have been working with RC for a long time and I know some awesome SQL tweaks that work wonders, etc. ...
0
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0answers
37 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 ...
1
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2answers
319 views

Postfix on Centos7 not accepting Public port 25

I have a new mailserver (postfix) on a new CentOS7 install. I can connect (telnet) on 127.0.0.1 port 25 and on the public IP from the local machine but not on the public IP outside the machine. I use ...
0
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1answer
47 views

CentOS and a small boost example

I ask this question here, because I think, it has more to do with linux than with boost itself. So i created a small cpp file: #include <boost/math/special_functions/round.hpp> #include <...
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2answers
158 views

rsync --delete did not remove file in destination while with ssh

On my RHEL6 pair of servers, I tested the rsync from server-1 to Server-2 with SSH. Everything was good as expected. However, when I moved a file under A directory, A/x.file to B/ of /home/user on ...
1
vote
1answer
3k views

Vagrant 1.7.*. is not supporting supporting virtualbox 5.x?

I have installed virtual box-5.0.2r102096. Previously I have virtual box 4.3.*. Vagrant version is Vagrant 1.7.2 but it was giving me following type error when I do vagrant up Failed to mount ...
3
votes
4answers
13k views

Permission denied (publickey,gssapi-keyex,gssapi-with-mic)

Ok, so I have tried this quite a few times and I'm sure this is very trivial but: I am trying to SSH via command line on Ubuntu into my VM (Centos6) with an RSA key-pair I created using key-gen. I ...
0
votes
0answers
130 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 ...
1
vote
1answer
937 views

How to make modprobe nf_conntrack_ftp persist a reboot on CentOS 7 and firewalld?

I'm stumped. I've seen the related questions about editing /etc/sysconfig/iptables-config, but I'm running CentOS 7 (and webmin/virtualmin), which uses firewalld instead of iptables. How do I get ...
0
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1answer
117 views

Backup issue DirectAdmin - Centos 7

i hope that someone can help me with this. In Centos 7 + DirectAdmin i have a problem when i wan to make a backup from all users as ADMIN. I have googled tried alot of things but nothing helps... I ...