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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Forgot to add mx lines to DNS, is there anywhere my emails would be caught? (CentOS)

I set up a server on digitalocean, but forgot to add the MX records to the dns. Is there anywhere the emails sent to my domain would end up? Any way to recover them?
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1answer
134 views

Init 3 command with systemd

I am using Oracle Linux 7 for test purposes. I understand that the entire RHEL family (RHEL, CentOS, and OL) is using systemd now. As far as I know with systemd instead of init 3 I should use ...
0
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1answer
741 views

how can I run a java application as daemon?

I use to run an application in CentOS with the command nohup java -jar AnalyticsBackend.jar & Now I want to run this application as daemon i.e. on reboot, this application shoud start running ...
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2answers
1k views

Is it possible to run a dialog/whiptail script in one TTY from another?

The origin of this question, for me, is being able to run a whiptail command in a %pre script from a kickstart file when installing a custom distribution based on Centos. However, the behaviour ...
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0answers
3k views

How to install libwebkit (libwebkitgtk-1.0.so.0) in order to run CodeLite?

A pre-requisite for running codelite is WebKitGTK. codelite: error while loading shared libraries: libwebkitgtk-1.0.so.0: cannot open shared object file: No such file or directory I'm on CentOS, ...
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1answer
1k views

How could I install libevent 2.0+ while reserving system provided libevent 1.4?

I am a newbie on RPM I want to build a RPM of tmux and libevent for centos 6.5 which does not ship. The problem is tmux needs libevent 2.0+ which centos 6.5 does not ship either. So I wrote rpm spec ...
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1answer
39 views

How many actual files were you able to store in a CentOS folder? [closed]

I found many questions about the total files limitations of the CentOS file-system, but I was curios in actual real-world situation, how many files people were able to store in one single CentOS ...
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2answers
1k views

Port forwarding remote traffic through physical router to go through pfsense VM, then to centos VM web server

I hope this makes sense, I'm completely self taught and planning on going for formal instruction. As I understand this is possible, however I haven't been able to find definitive answers to my ...
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1answer
238 views

How to start GUI application with upstart?

I have struggled with this problem for three days and I have tried many ways to solve it but not successful yet. I hope you guys can help me... I have an GUI application. I want to start this ...
2
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2answers
354 views

LUKS encryption with non-interactive login on RHEL6

I need to have LUKS encryption on this system but during lab development I don't want to have to enter the password at the console each reboot. I'd like a way to set a simple password that can be ...
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1answer
2k views

How to install Wireless USB adapter drivers in CentOS 6.5 64bit?

I have installed CENTOS 6.5 (64bit). I have my Belkin N150 wireless USB adapter (Model: F9L1001v1). I need to install the drivers. Where can I get the drivers and information on how to install them? ...
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1answer
135 views

Iostat and top show static resource usage on first value

For one of my projects, I need to obtain resource (CPU, I/O and disk-space) usage programatically. Currently I'm running shell commands (iostat) and parsing the results which works relatively well ...
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0answers
905 views

How to upgrade Nginx and install php-fpm on CentOS

I want to upgrade Nginx via Yum, and also install PHP-FPM as usual. Most blog and online resources use the EPEL and REMI repos, but they're not working on my server. My OS info: Linux ...
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2answers
226 views

what can be the reason for no permission even using root or sudo

When root or using sudo, I cannot write to some files. I have a file fileA with permissions 750 fileA rwxr_x___ root root When I run a program as root or using sudo, the system prompt is: no ...
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3answers
411 views

yum remove only single rpm file instead of all packages related to it

My environment: CentOS 7.0 Keep a rpm list by: rpm -qa > before.list Try libreoffice-calc. (112M bytes) yum install -y libreoffice-calc Think it is useless, I want to remove it. I found yum ...
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2answers
1k views

Installing PostgresSQL on CentOS 6.4 without yum

I've got a company server running CentOS 6.4 on which I'm required to install the tools required for a webapp deployment. One of those tools is PostgreSQL server, however the company VPN is blocking ...
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2answers
551 views

cron table mailx caused empty content

I'm using centos 7.0/6.5. The content of /etc/cron.hourly/mail.cron #!/bin/sh log=/var/log/mail.cron.log echo "`hostname` `date`" >> $log 2>&1 mailx -s "test mail" me@example.com < ...
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2answers
80 views

epel 6 want to update a package with the epel5 version in Centos 6

I have downloaded and installed the epel 6 in Centos 6 using: wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -Uvh epel-release-6*.rpm but when i do: yum update ...
1
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1answer
736 views

Running into errors on installing addons in asterisk

Trying to install asterisk on my centos system following this tutorial but on doing ./configure –libdir=/usr/lib64 && make menuselect && make && make install in my terminal ...
2
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0answers
72 views

Printer configurations on Linux: Providing privilege to normal users

I am on a CentOS machine. Everything is working fine, I can configure the printer with the GUI System->Administration->Printing. It asks for root password and then I can make the configurations. ...
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1answer
54 views

CentOS - ipTables

I have some questions about ipTables. Is it possible to open all ports between 2000 and 6000 and then have 2245, 5435,5434 closed? Is it possible to open some ports from a ip address? Eg. The only ...
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2answers
460 views

What is the purpose of usb0 ethernet device on Centos 6.5 machine?

My Centos 6.5 machine installed with 2 ethernet device (eth0 and eth1). But when I listed all ethernet device with ifconfig -a as root, in resulted list have another ethernet device usb0, as follow: ...
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1answer
655 views

CentOS 7.x iptables

I have manually edited the /etc/sysconfig/iptables file in my CentOs 7.x installation , I have two entries and two processes running at the respective ports. I am able to telnet/access port 2181 but ...
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2answers
330 views

CentOS 6.5 PHP extensions

I need to enable php extensions like PDO and GD but I can't find a section with all the PHP extensions enabled inside /etc/php.ini, so in which file is this defined? EDIT: using PHP Version 5.5.14 or ...
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0answers
629 views

Can't connect to Virtualbox web server (using Bridged Network)

The host is using CentOS 7 (from DVD ISO). I installed Apache (yum install httpd) and made sure the service is running. I've tried restarting the service and the guest machine itself, however I still ...
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1answer
107 views

Make newly created or uploaded (via ftp) files belongs to a group by default

Each time you create a file or upload it via FTP, considering your user is "myuser", it's chwon would be "myuser" for user and "myuser" for group. So you have to manually execute chown command to ...
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1answer
340 views

CentOS on Docker: How to install doc files?

I’m trying to install the Kolab groupware in a Docker container based on CentOS 6.5. At first glance, the installation of the official packages seemed to work without problems. But afterwards, when I ...
0
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1answer
22 views

Tuleap: display of project title

I created a new project with a quote in the title. However, in the title of the project Tuleap added a back slash just before the quote. The title of my project is Gestionnaire d'études, and Tuleap ...
0
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1answer
168 views

Can I repartition Centos 6 without losing any data?

I have 10 GB space in my /home partition. I am now running out of space in this partition. But I have enough space in my / partition. Is there any way to increase my /home disc space by transferring ...
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0answers
83 views

Linux Box Internet Speed

I have encountered a weird problem with my Centos6 Server, currently I have install Centos6.4 on a 64bit support CPU with 8GB of RAM and 500GB HDD. Just went to check on the internet this morning and ...
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2answers
118 views

Why do I see the unicode character è when I type Alt-h in my xterm on CentOS?

I am sshing into a centos box from an ubuntu box. I keep seeing è when I type alt+h (aka M-h). I want to use this key combo in tmux bindings but it doesn’t work because tmux doesn't recognize utf8 ...
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0answers
459 views

CentOS 6.5 blank screen after an update

I just updated my CentOS 6.5 with the following command: sudo yum update after the update it asked for a restart and I did it but than now when the loading bar finishes loading I have a totally ...
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0answers
303 views

Can't login to CentOS desktop as root via GUI prompt

I have CentOS 6.5 running on a VM in VirtualBox (Windows host). I had no problems logging in as root from the GUI prompt (clicking on Other and typing root, then my root password and getting the ...
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3answers
3k views

installing GitLab on CentOS7 failing due to create on resource user

I am trying to install gitlab on a VM under VirtualBox running CentOS 7 I am following the following instructions: https://about.gitlab.com/downloads (for CentOS) I configured gitlab.rb to contain: ...
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2answers
432 views

apache got internal error when access ldap module

I'm installed httpd 2.4, and the /etc/httpd/conf.d/ssl.conf like WSGIScriptAlias /wsgi_app /trac/cgi-bin/wsgi_app.py <Directory /trac/cgi-bin> Require all granted ...
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1answer
1k views

New to Linux, cannot get my internet to connect in VMWare

I installed CentOS today and did a minimal install. I got everything set up and got Gnome installed but I simply cannot connect to the internet. I can ping my loopback address and everything looks ...
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1answer
179 views

How to give apache ownership rights when creating a new file? [Centos 6]

So, is it possible to make multiple users the owner of a file when created? I mean, I know you can do chown -R apache:permissions /var/www/ (48:500) but that is only temporary because even if I decide ...
4
votes
1answer
4k views

“screen is terminating” for non-root

When I try to run screen as a non-root user I get: screen [screen is terminating] immediately, though it works fine for root ls -alh /usr/bin/screen -rwxr-sr-x 1 root screen 465K Jun 9 20:30 ...
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2answers
30k views

Searching for grub configuration file in CentOS 7

Im searching for grub.conf file in CentOS 7. I cant find it with locate(I called updatedb before). Where does it stores? In older versions of CentOS I could find it.
1
vote
1answer
2k views

Other ways to increase max open files?

I have an application which keeps giving me the following error. tail: inotify cannot be used, reverting to polling: Too many open files I have already followed all the advice I've been able to ...
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0answers
305 views

Install error Opencv, CentOS 6.5 make error

I have followed the instructions from a previous question [question]: Install OpenCV in CentOS and I continue to get the following error. I have tried using cmake28 as well with the same result. make ...
2
votes
1answer
200 views

IPSet with IP6Tables ERROR

Can someone please solve my headache and tell me how to fix this? [root@www ~]# ip6tables -I INPUT -m set --match-set blacklist6 src -J DROP ip6tables v1.4.7: Couldn't load match ...
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1answer
418 views

Opening a port on CentOS server not working externally?

I am trying to to setup a Ghost blog instance on port 80 of my CentOS 6 virtual server. There are no pre-installed web servers occupying port 80. If I run Ghost in production mode as a background ...
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2answers
436 views

PECL SSH2 Installation issue

I am running this command: sudo pecl install ssh2 It resulting the following log and exit with an error: libssh2 prefix? [autodetect] : building in /var/tmp/pear-build-rootHyRX5L/ssh2-0.12 ...
2
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1answer
29 views

df -h Size - User != Avail

When I run df -h I get the following Filesystem Size Used Avail Use% Mounted on /dev/sda3 809G 753G 14G 99% / But Size - Used is not even close to Avail (809-753 = 56 ...
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0answers
318 views

White label Nameservers (RDNS): IP and BIND Syntax Questions

Some questions regarding setting a RDNS on a DNS cluster using BIND/WHM/cPanel + WHM DNS Only. Objective Setting up a DNS Cluster of: East US | Xen | CentOS 6.5 | with WHM/cPanel VPS | 2 IPv4 | ...
3
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1answer
9k views

How do I start Postgres on CentOS 6.5?

Whenever I try to start Postgres, it gives me an error. Even if I remove the directory it complains about, it still fails. [root@ip-172-31-15-65 init.d]# service postgresql start /var/lib/pgsql/data ...
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4answers
2k views

CentOS- Can't SSH

I recently tried to SSH into my server (an internet linking ham radio node) I just got back on air. I typed ssh root@10.0.1.9 which is my computers address confirmed by ifconfig eth0 Connection ...
0
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1answer
68 views

How to apply “set number” to vi on root?

I'm using vi on centos 6.5 and added "set number" script to /etc/bashrc in order to look line numbers whenever boot. It works well to show it on user login but not root. How to apply "set number" of ...
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1answer
176 views

shift space from /home to /var in centos

I want to increase the space of /var folder.The output of df -h is [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_livecd-lv_root ...