CentOS stands for Community ENTerprise Operating System, the most popular Linux distribution for web servers with almost 30% of all servers using it. Third-party software is not included in the base.

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backing up Linux (CentOS) to rsync.net

I'm doing a full backup of a server using /usr/bin/rsync and it seemed to hang. The problem was that the /proc directory has a huge file -r-------- 1 root root 140737477877760 Jan 24 13:...
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325 views

CentOS 7 Minimal Installation on Hyper-V: X11 forwarding using Xming and PuTTy error, xhost: unable to open display “:0.0”

Before telling me that there are a lot of post relates to X11 forwarding error, let me put you in context of the things that I have done: I have installed the following packages: yum install -y xorg-...
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13 views

Firefox on CentOS with a transparent background

How to change the background of Firefox when viewing web pages on CentOS 6.3? I don't know why. After a restart, the background is back to normal white. But after running for a while, it becomes half ...
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2answers
64 views

Can't telnet into mail server

I have a machine running CentOS. From that machine I can't telnet into a mail server. From my local machine I can do the following command: telnet mailserver.com 25 From there I can't send emails ...
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10 views

I want to do ldap client setup on my centos 7 virtual machine.

I have done 389 server setup on my virtual machine but i want to do client side setup using tls/ssl. anyone can tell me what's the step for the same.
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30 views

Centos graphical installer format old disk

In the Centos graphical installer, i would like to format the whole disk and start from scratch, but it still keeps a rescue version from the previous os on the disk, how can i disable that and ...
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1answer
21 views

Need Information about “Package Update Process”

When i issue the command "yum update" as root under CentOS, all updates will be installed. But what exactly happens during the update process. I am asking myself how a package gets updated. For ...
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100 views

Docker centos container on Windows is very slow

I have Docker container on Windows machine via Docker Toolbox. I mount folder from Windows to my CentOS container and looks like it works very slow. I mount folder with this command: docker run --name ...
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30 views

Can't access certain HTTPS sites on Firefox 3.6

I have an old box that has been running for many many years, and has been functioning as a monitoring box (i.e there are a load of tv's connected to it, and on those, there are many web pages showing ...
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28 views

CentOS 5.2, set up IP network

Good afternoon, I'm trying to get GCC installed on a CentOS 5.2 system, and I've been sent from UNIX/Linux forum to network engineering forum "http://networkengineering.stackexchange.com/questions/...
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14 views

Can't see any website hosted in a node while same issue is not present in other nodes in LAN

Recently we setup a Hadoop cluster with 10 nodes in our Office premises. All of these nodes are installed with CentOS 6. However the issue I'm facing may not be related to Hadoop and accordingly I'm ...
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125 views

PostFix Issue When Sending Emails through Outlook

I also have the Relay access denied issue and it's really disturbing me. I can send and receive normally from the web mail. However, when I configure the email on [B]Outlook [/B]without using ...
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1answer
54 views

Apache proxy returning 403 forbidden

I'm trying to set up a home page where I can redirect my requests to others servers with a proxy so I have a single point of entry. I used to have this setup working properly on a windows machine ...
3
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1answer
70 views

RedHat - default gateway static route

I am trying to set static routes and I did not succeed. My situation: 2 Nics 4 ports. Eth0 + Eth1 = bond0 (Class c) Eth2 - Active (Class b) Eth3 - Not Active All traffic goes through bond0 (default ...
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68 views

ESX 6 and Linux 3.x arp fail in back 2 back link

we are having a strange problem with back 2 back connection between an ESX 6 and CentOS 7 machine. Hoping to find a solution on stackoverflow The story is below: - we are using a CentOS 7 directly ...
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1answer
54 views

How do I create rDNS (Reverse DNS)

How to create rDNS (Reverse DNS), I am using Centos 7.0 and I need to create rDNS for 50 IP's and domain. Can you please guide me how can I create. Example. Example.com - xxx.xxx.xxx.xx0 Example....
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96 views

Bootable CentOS disk image won't boot in VMWare

I have custom bootable disk image built from a full CentOS 7.1 iso. I can burn this raw image to a USB stick and then use it to boot a server and install CentOS on that server. Alternative, I can ...
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1answer
291 views

installing mariadb 5 on centos 7 Unit mariadb.service failed to load: No such file or directory

I try to install mariadb on centos 7 using official documentation https://mariadb.com/kb/en/mariadb/yum/ I have installed these packages: Installed Packages MariaDB-server.x86_64 ...
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1answer
68 views

Apache httpd.conf - Virtual hosts port

I have an Apache Webserver running, which is reachable over the ip/port-combination 123.456.789:9000 from my browser. Also I have a GitLab instance running on the ip/port-combination 123.456.789:8888 ...
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2answers
28 views

How to boot centos for recovery without monitor or DVD?

I modified the fstab to include the newly created partition, then rebooted. But the system won't boot, and I suspect it is due to incorrect information in fstab. My machine has no monitor, no working ...
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189 views

Port Forwarding on CentOS 7 using FirewallD

I have a network where I have a Netgear cable modem bridged to a VyOS Router, then a DMZ network to my external firewall / internal gateway then into my local network. (I have the Netgear modem ...
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122 views

CentOS 7 and LDAP Authentication

I want to connect my CentOS 7 to our AD server for authentication, but I am confused about the configuration. Here is the configuration that is working on an SVN server: SVNParentPath /var/svn ...
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1answer
68 views

Need to backup restore Linux system remotely

I am trying to build a setup like WDS (Windows Deployment Service) in a Linux environment. What I have: A Dell server with good amount of RAM and lots of space. OS is CentOS 6.5. Few 3rd party ...
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1answer
153 views

Firefox - This Connection is Untrusted - Google

I'm not sure why, yet all of the sudden I'm getting this while trying to open www.google.com My system: [alexus@wcmisdlin02 Desktop]$ cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core) ...
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1answer
33 views

Is IPTABLES obsolete when behind a router?

I'm still quite noobish when it comes to networking. I was fiddling around with squid on centos and i was wondering whether turning on iptables when your centos box is behind your isp modem/router has ...
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151 views

CentOS 7/VMware Hang on Boot ([sda] Assuming drive cache: write through)

I am new in Linux. i use CentOS 7 (CentOS-7-x86_64-DVD-1503-01.iso) in VMware workstation 9. Host system is windows 8. i was trying to install the update. when i restart it hang during boot. it show ...
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2answers
27 views

I want to share the hardwares between two systems which are connected on the same network

I want to share the hardwares between two systems which are connected on the same network. I am having two desktops, one with 16GB RAM and other with 48GB RAM. Both are running CentOS minimal. I want ...
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1answer
63 views

WinSCP: wait at `searching for host` page

When I try to connect my Centos running on VMWare, WinSCP wait in searching for host line and do not connect. I've checked that SSH is up and running on port 22 of my VMWare and turned off windows ...
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52 views

Linux YUM: How to update ONLY packages with the size less than specified amount?

I am Using Centos 7 and having limited Internet at home, My Question is how can i update only those packages which cent yum asks to update with the size less than 5MB for example? (And I mean by ...
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1answer
73 views

How to configure LAN segments in CentOS 7 clients?

I created a set of VMs and I want for them to share a communication channel (or more) between them. So I added, aside the NAT interface to connect to the internet, a LAN Segment interface or two. My ...
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311 views

Check box / radio button in Linux (CentOS 7 - KDE 4) doesn't response

It happens every time I open a Setting Dialog or something like that in my System or even in all applications (eclipse etc.) When I click on the check box like this one, it just doesn't show up that ...
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59 views

host win10 can ping guest centos6 but centos6 cannot ping win10?

I use Wifi at home and my Virtualbox network mode is bridge adapter + promiscuous centos 6 network information is Winows10 can ping guest centos6 and I can use secureCRT to conncet to ...
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69 views

php-fpm downgrading php version

Current Software Version:- OS : CentOS 7 PHP : 5.6.14 After installation of php-fpm on nginx 1.8, it downgrades php to 5.4. Even though new and latest version(5.6.14) is already installed. I don't ...
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32 views

Linux - How to record speaker and mic from command line?

I'd like to be able to record my VoIP conversations. I'm looking for a solution which: Runs command line (no GUI; I want this to automate) Doesn't disrupt the audio (that is, it can record the mic, ...
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95 views

Installing zerofree on Centos 7 bare

I am trying to reclaim free disk space from a VirtualBox VM with Centos 7 as the guest OS. All of the resources I found online recommend using zerofree to zero out the free disk space before ...
2
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1answer
65 views

ssh force tty return extra non-printable character

I know ^M will show up when ssh -t, ref1, but I don't catch the situation when ssh -t into Centos 7.2(even Centos 6.2 is OK, but no difference between their environment vars). Anyone know about this? ...
0
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1answer
138 views

How to set 644 file permissions for newly created files and 755 for newly created directories?

I have an e-commerce site in Magento. When I upload a file using the administrator, the folder is created with 770 permissions, and the actual file is also created with 770 permissions. Cause of this,...
3
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1answer
128 views

Does Open Broadcaster Software install in CentOS6?

How can I install Open Broadcaster Software on CentOS 6.7?
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1answer
71 views

Nginx serving C++ cgi script: response is binary format

I am trying to run C++ CGI script on nginx. I am using FCGIWrap with script from nginx website. The program code is like this: #include <iostream> using namespace std; int main () { cout &...
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1answer
304 views

Can't install python requests library on Centos 5.11

I'm running Centos 5.11. I'm trying to install the python requests package. But pip keeps giving me syntax errors. pip help returns [root@32437-201824 bin]# pip help Traceback (most recent call ...
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18 views

Installing Spamassassin on CentOS - no external emails come in

I've installing Spamassassin on CentOS 7, with postfix and dovecot. Local mails work fine- but no external emails (other than my domain) come in. I disabled Spamassassin; all worked fine again. The ...
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327 views

xenserver 6.5/centos 5.10 parted/glibc upgrade missing dependency that is not missing

I cannot seem to find the official best way to get round this issue: $ yum --enablerepo=base --disablerepo=citrix install parted Loaded plugins: fastestmirror Loading mirror speeds from cached ...
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1answer
44 views

Confused about Putty colors - Centos 7

So I am using nginx as my server if that helps at all. I also use Putty as my connection manager as well. So while setting up domains here and there under nginx, there seems to be a difference in ...
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232 views

systemd-udevd.service ignoring 60-net.rules

I've tried my hardest to get this to work without asking for help. I can't figure it out. I have a machine that has 6 ethernet ports. I want them to be consistently named eth0 through eth5 just as we ...
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111 views

Apache 2.4 tuning - idle workers during load

I have setup: CentOS 7, Apache 2.4 + mod_disk_cache, PHP 5.4 + opcache (haven't yet added memcached for sessions). Apache is running in event MPM, and PHP is accessed through mod_proxy_fcgi to PHP-FPM....
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1answer
19 views

How to change centos partition to LVM

all I have centos installed in vitual machine, but its partition is in old style, now, I need to change it to LVM. Is it possible? And how to do that? I don't want to reinstall the system. Thanks in ...
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1answer
86 views

Allow PHP to execute in a specific subdirectory, when parent directory is denied?

I operate a small shared server and would like to give some of my users the ability to execute PHP code from the browser (but not all of them) but have been unable to do so. In the top level ...
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1answer
282 views

Not detecting network card in centos 7

In my VMware Workstation I have installed CentOS 7 but it is not showing any network card. When type lspci I am geting :*-2:00.0 USB controller: VMware USB1.1 UHCI Controller 02:01.0 Ethernet ...
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51 views

Remove backups older than 7 days except first of every month

I want to delete backups older than 7 days but keep the first of every month. The name of the files is name_$(date +\%d\%m\%Y).tar.gz I want to keep name_$(date +\01\%m\%Y).tar.gz I want something ...
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1answer
15 views

What is the minimal lines of text needed for a desktop entry to autostart after GUI login?

Most desktop Linux distros allow you to autostart applications in a flexible manner as described in Freedesktop.org's Autostart spec. There are two steps: 1. mkdir -p $HOME/.config/autostart 2. create ...