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

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3
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1answer
53 views

how to eject/unmount usb dongle logically?

We've bought a commercial application who just work only if their dongle usb is connected to the server. However sometimes the application can not recognize the dongle, so it doesn't work, but if ...
0
votes
1answer
53 views

run multiple instances of MySQL CentOS7

I need to have multiple instances of MySQL running on my PC. I did this: yum install mariadb-server mariadb => install mysql mysql_install_db --datadir=/var/lib/mysql => use mysql_install_db ...
-1
votes
4answers
161 views

The server is not accessible only from my IP?

I am Using a CentOS 7 and Apache 2.4 as my website host. I tried a number of other machine and some can reach the server and some cannot including my PC. I have disabled stopped firewall (systemctl ...
0
votes
0answers
21 views

Winexe “failed to open connection - NT_STATUS_RESOURCE_NAME_NOT_FOUND”

I'm trying to run secedit on a Windows server using cmd, remotely from a Linux (CentOS6) computer. I installed Winexe for this purpose, but the command winexe -U username%password //host "cmd.exe" ...
0
votes
3answers
52 views

How to install GCC 4.7.2 on CentOS 5.2?

I'm trying to install GCC 4.7.2 on a CentOS (virtual) machine. In order to do this, I downloaded GCC 4.7.2, and tried to configure and to make it. Unfortunately the configuring didn't work, as other ...
0
votes
1answer
66 views

Installing oci8 php extension

On a CentOS 7 server, I have installed PHP from remi repository. I need to connect to Oracle 9.2 on a remove machine. Installing oci8 via yum install oci8 results OCI8 Version 2.1.0 which is not ...
0
votes
0answers
26 views

Centos 7 persistent static routes for any interface

I am trying to set up some static routes in a CentOS 7 box. The official RHEL says it is possible to add files in /etc/sysconfig/network-scripts/route-interface. This approach works, however I need ...
0
votes
1answer
43 views

CentOS 6.7: network is unreachable after a new clean installation

I have a new clean installation of CentOS 6.7, it is not on a VM, but on a dedicated notebook. During the installation procedure I've configured my WiFi connection and have added it on eth0 ...
1
vote
0answers
26 views

Screen wont work once monitor is disconnected

I have a JetWay PC (JBC375F3AW) running CentOS7. When it boots up everything works OK. If I remove the cable going to the DVI port and re-connect it, it wont work. The same goes if I boot the box ...
0
votes
0answers
21 views

problem with ABAQUS job on Rocks cluster

I created ROCKS6 cluster and i installed ABAQUS on my cluster and it works well on frontend, but i can not submit job on my 2 other compute nodes. I just want to run ABAQUS on this cluster (frontend ...
0
votes
0answers
29 views

Syslog stopped logging after using journalctl

Today I was configuring some things in my VPS running CentOS 7, and checked /var/log/secure several times without noticing any problems.Later I used journalctl to look for some cron logs, and now it ...
0
votes
1answer
14 views

Install correct version of NVIDIA on cent os 6.3?

I want to install NVIDIA drivers for cent os 6.3. My laptop is Toshiba Satellite series L750. The brightness control doesn't works in the system. It is 100% brightness now, so difficult in working for ...
2
votes
1answer
24 views

Why does audit2why have nothing to do?

I know I have an issue with SElinux. So I am following a tutorial that will help me understand the nature of the file access problems I am having. That was I can still have SElinux enforce as supposed ...
1
vote
0answers
20 views

How do I get a certificate on a server from a certificate authority server using an OpenSSL request?

How do I get a successful request for a certificate from one Linux server to a Linux server that is a certificate authority? I'm using Centos 7 on both servers on the network. I'm using an OpenSSL ...
3
votes
1answer
32 views

Automated RPM builds

I'm making my own personal RPM repository. So far, I've built the following packages: x264 libx264 libx264-devel x265 libx265 libx265-devel lame libmp3lame libmp3lame-devel libmfx ...
2
votes
2answers
1k views

VirtualBox Kernel Module Installing Issue

I installed VirtualBox, in the first run i got this warning: WARNING: The vboxdrv kernel module is not loaded. Either there is no module available for the current kernel ...
0
votes
1answer
16 views

The path to sshd centos

How do I find the path to sshd? I need it to configure some stuff but the instructions just say /path/to/sshd. Does that mean the sshd_config file or something else? is there a default? or terminal ...
0
votes
1answer
33 views

nc command and iptables on CentOS7

I have practised in using iptables on CentOS 7 (It is a guest machine on Virtual Box). At first I disabled firewalld: systemctl disable firewalld systemctl stop firewalld Then I installed iptables: ...
-1
votes
1answer
17 views

What are all the places http_proxy can be set?

I am trying to install a Centos 7 VM imported from another LAN environment. I have reconfigured the network in /etc/sysconfig/network-scripts/ifcfg-eth0. So now I can ssh to the machine and ping ...
1
vote
1answer
39 views

Centos 6.7 broken Sudo

After installing devtoolset 2, it appears my sudo command is broken. readlink -f $(type -P sudo) /opt/rh/devtoolset-2/root/usr/bin/sudo I believe the commands I ran to install devtoolset2 ...
0
votes
0answers
42 views

Find reason of shutdown using var/log/messages

I am facing the issue of random shutdowns, I have attached the log messages if anyone can interpret and let me know what is the reason of shutdown, I will be more than grateful. LOG MESSAGES Jan 11 ...
3
votes
2answers
75 views

How many processes can listen on a specific port?

How many processes can listen on a specific port such as 80 ? and how the child processes of some application can use the same port to listen on ? Is there any difference between listening on a port ...
0
votes
1answer
24 views

apache webserver connection timeout problem

I have two host machines First Host Machine running on vmware , i created virtual machine based on centos 6.7 32bit . the virtual machine has two network interfaces eth0 for public connection (NAT) ...
3
votes
2answers
69 views

Is core dump generation an atomic operation?

I mean if I see core.<pid> in filesystem does it mean that core file generation finished and I can use it on my own? My question was answered. But I decided to explain it a little bit. I ...
0
votes
0answers
58 views

Can't install phpMyAdmin with PHP 5.6

I work on a Centos7 with php56 (via remi-repo) and httpd and maria-db I try to install phpmyAdmin via "yum install phpmyadmin" but every time I have this message: Erreur : Paquet : ...
0
votes
1answer
91 views

Unable to get rid of repo on Centos 7

I have a Centos 7 machine on which I am trying to install PHP 5.6 and associated binaries. For this purpose, I installed the epel and the remi repos. I also installed the webtatic repo which now is ...
1
vote
3answers
53 views

Error: install exited abnormally [1/1] while installing CentOS-5.4

In my system, I have installed ubuntu. I Follow this article : How to Set Up a USB Key to Install CentOS to create bootable USB for CentOS-5.4. Steps i have done after booting successfully: Choose ...
0
votes
1answer
181 views

Downgrade Centos 7.2 to 7.1

I am currently using Centos 7.2.1511(check from file /etc/redhat-release) and trying to downgrade it to Centos 7.1.1503 (due to some package installation issue in centos 7.2) using the command yum ...
0
votes
0answers
39 views

How to install ABAQUS software on Rocks cluster 6.2

First of all sorry for my english. I create a new cluster with 3 . which one of them is frontend and two of them is compute . i should notice that, i am newest in linux and linux hpc clustering. I ...
0
votes
2answers
64 views

Make python 2.7 the default python in centos, making an alias didn't work

I am trying to install llvm on my centos 6.7. While running the configure file it says it throws the error checking for python >= 2.7... not found configure: error: found python 2.6.6 ...
4
votes
1answer
79 views

Pulling all of a process's swapped memory out of swap

How would one go about quickly pulling all of a process's swapped memory out of swap without writing to disk? The context on this issue is trivial, as the systemic issue necessitating the question ...
0
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0answers
28 views

Unable to umount dvd on CentOS 7.2 kickstart installation

I have a kickstart file that was working fine on a RHEL 6 installation before, and now I want to reuse it to provide an automated installation on a CentOS/RHEL 7 DVD (currently testing on CentOS ...
2
votes
2answers
790 views

Unable to install dahdi - /usr/bin/install: cannot stat ‘’: No such file or directory

I am trying to install dahdi in my centos 7 system using this link but having some errors [root@localhost ~]# cd /usr/src/dahdi-linux-complete* [root@localhost dahdi-linux-complete-2.11.0+2.11.0]# ...
0
votes
0answers
46 views

Centos7 crontab @reboot sleep not working

I am currently trying to get my server to relaunch a few things on server reboot but they were failing due to screen not yet being loaded (I believe), in an attempt to fix this I added a 3min sleep to ...
0
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0answers
28 views

rsyslog not working

I have been trying to start the rsyslog service on centos 7 but I wont work. Please see te configuration file- # rsyslog configuration file # For more information see ...
3
votes
1answer
46 views

Shared libraries and different linux systems

Is it possible to use a shared library, compiled for example on a RedHat / CentOS system, on a Ubuntu system?
0
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0answers
8 views

Claiming node on swiftstack times out

I am trying to connect a node that I have installed CentOS on using SwiftStack. To make this connection, both port 443/TCP and 1194/UDP will need to allow outgoing traffic on your firewall. I have ...
0
votes
1answer
57 views

Installed OS on EFI system crashes on grub shell

I have installed an el6 based custom OS on an e-mmc drive. This machine doesn't have legacy boot mode, only EFI. The installed OS has grub-0.97-77.el6.x86_64.rpm. Using a rescue disk I can see that ...
3
votes
1answer
40 views

Can I enable cephx authentication using a pool in qemu/kvm?

(CentOS 7, Ceph Incunabulus, everything patched up to date) Background I've got a working converged Ceph/qemu/kvm cluster with cephx enabled for authentication. I'm trying to use this to store block ...
1
vote
1answer
28 views

Can't set the locale (man-db.cron)

Everyday I am receiving an email with the following content /etc/cron.daily/man-db.cron: mandb: can't set the locale; make sure $LC_* and $LANG are correct When I check the results of of ...
0
votes
0answers
76 views

CentOS 7 blurry, fuzzy screen

I just installed CentOS 7 to Dell Optiplex 780 and I have problem with display. I am using two screens and they are quite blurry, fuzzy. You can see the problem (look at the terminal) - ...
1
vote
0answers
35 views

PHP app crashes: child pid exits with Illegal instruction (4)

I have a CentOS 6 server with Apache and PHP. I run some application and can constantly reproduce this crash. After some sequential action the app dies and the only trace I found is the following ...
0
votes
3answers
42 views

What is the opposite of yum provides?

yum provides <command> tells you what package provides, for instance, /usr/bin/python. But how do I find out what commands are provided by a certain package?
1
vote
1answer
284 views

php 7 install throws “Cannot load Zend OPcache - it was already loaded” error

I am using salt to provision my servers, and I just tried to upgrade to php 7 and although everything is installing correctly, anytime I run php -v or run any php anything it throw this at the head of ...
3
votes
1answer
80 views

Wget and curl can work normally, but ping fails

When I ping www.google.com and 8.8.8.8, I get no reply: # ping www.google.com PING www.google.com (216.58.221.228) 56(84) bytes of data. ( no response) # ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) ...
0
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0answers
60 views

Installing qemu-kvm 2.5 on Centos 7

Are there any repos out there that carry the most up-to-date version of qemu-kvm as well as dependencies? I ask because the newest qemu-system has a HUGE list of dependencies and I would like to not ...
0
votes
0answers
15 views

Centos 7 i686 Log entries

It appears that my system has a built in bootable recovery image that appears when it doesn't boot to windows and it presents it self as a SMI USB drive. Linux is picking this up as SDE which doesn't ...
0
votes
0answers
33 views

TLSv1.2 support in CentOS 5.8

Right now I can't access HTTPS site from PhantomJS headless WebKit browser because of TLSv1.2 In my CentOS 5.8 I have following OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 verison installed. I think I ...
1
vote
0answers
18 views

Detect ad blockers add-ons/extension on CentOS 5.8 [closed]

In continue to this question http://stackoverflow.com/questions/34567812/phantomjs-centos-5-8-unable-to-render-the-page/34587524#34587524 I'd like to detect any ad blockers add-ons/extension installed ...
0
votes
0answers
28 views

Why can't I install CentOS 7 in dual bot wth Winows 8.1?

I'm getting crazy with this OS :'( I want immediately say that I'm sorry for my English, I hope I can explain myself well. Please let me just explain few things: I need to build something under ...