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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Hyper-V 2012 R2 different disk speed on CentOS and Debian

I found unexplained difference between running CetOS 7.1 and Debian 8.3 on Hyper-V 2012 R2. I create similar VM on similar hardware. Both virtual machines installed on 600 GB SAS 15K in RAID0 via ...
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1answer
57 views

centos login in the first time

I'm a beginner to play Linux. And I've installed Centos into the VMware. However, after I set the settings, the windows run the all black window and ask me to login. Of course, I key my account and ...
2
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1answer
32 views

Centos Sftp Ssh - How always create files with rwx-rwx-r-x and always owned by a certain group

I have a user myuser, which is only allowed to connect to ssh via sftp. I'd like this user to always create files with rwx-rwx-r-x and always owned by the group apache. I've tried to accomplish the ...
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2answers
64 views

Centos - PhpMyAdmin showing blank screen

I have just installed PhpMyAdmin, and when i try to access it it just shows a blank screen. I suspected this is because i followed a tutorial on how to secure php and disabled multiple settings, so i ...
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15 views

Customize telnet login

I'm trying to customize the login screen on my CentOS server but I can't for the life of me, figure out how to change the actual login prompt, when the system asks the user for a login name. I want to ...
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23 views

Taking a 'snapshot' of centos 7

So I am trying to basically move all my settings/files on my Centos 7 server elsewhere. But I am unsure as to how should go about this. I researched on what I should do, and I came across a digital ...
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23 views

Telnet script without logging in

first of all I'm new here, so I apologize if I make any mistakes. So I wrote a python script to check a database for some information and I would like to make it publicly available through Telnet. ...
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1answer
35 views

copying ssh id from debian to centos times out, how to debug?

I'm setting up another pc on my network. it will eventually be headless. It currently boots into the centos CLI ~ which is fine. now i want to copy over my ssh rsa key from my main debian pc to the ...
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21 views

How do I create a Docker container with a non-default IP address?

I created a docker container with this command: docker run -p x.x.x.x:80:8080 <imageName> bash where x.x.x.x was the IP address of the Docker server running CentOS version 7. I then tried to ...
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1answer
59 views

I can Telnet into a Linux CentOS system but cannot SSH into it. My colleagues say they can SSH into it

My company has a server (server A) in a data center belonging to a telecoms company. The server has no access from the internet. I need to access this server because of a server application that I am ...
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1answer
26 views

ipset -j SET --add-set notwroking in cetos

I recently installed ipset rpm and kmod-ipset rpm for my Centos (Linux 2.6.18-194.11.3.el5 i686) and try to hands with help of some examples from internet, but when I try to ban user who tries to ...
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21 views

How to fix Nemo file explorer as crashes frequently in Linux and asks for root privileges to fix the error?

I have Nemo installed on Centos and Fedora, on Gnome classic and Mate Desktop, crashing every now and then and asking for root privileges to fix the issues found but other explorers work just fine. I ...
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2answers
304 views

Connection refused when trying to SSH. But port 22 is not blocked. Pings work

Connection refused when trying to SSH. But port 22 is not blocked. Pings work. I'm running CentOS 7 VMs and open source Docker. I want to SSH to Docker containers from other VMs or other Docker ...
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1answer
340 views

Convert init script to systemd - executable path is not absolute

I am trying to convert one of my init scripts to systemd but to no avail. [Unit] Description=My Service After=network.target Wants=mysql.service [Service] Type=oneshot PIDFile=/var/run/MyService....
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1answer
155 views

Cannot restart apache on Centos 7

I cannot restart HTTPD on Centos 7. When I try to run the command it shows this error below. How can I overcome this? -- -- Unit session-735.scope has begun starting up. Apr 12 15:33:01 localhost....
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1k views

Failed to adjust OOM score of renderer with pid X: Permission denied

I'm not sure what exactly causing, but I'm getting following error: Apr 11 12:30:00 X alacarte-made-2.desktop: [1712:1735:0411/123000:ERROR:zygote_host_impl_linux.cc(162)] Failed to adjust OOM score ...
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1answer
205 views

Samba 4.2.3 - Access Denied to Home folder as root user

I am running CentOS 7.2 x64 with Samba 4.2.3-12.el7_2. My Samba config is as follows: [global] server string = log file = /var/log/samba/log.%m max log size = 50 guest ...
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34 views

Windows 10 access to CentOS

How can a windows 10 user access the CentOs Linux 7.1.1503 over samba server? Windows 7 and 8 users are able to access but Windows 10 user.
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25 views

Startup script unexpected results

I'm experimenting with a small script to setup my webserver on Vultr. This is a "Startup script" that is used by Vultr on the background after deploying a new machine for me. If I run manually with ...
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1answer
26 views

What does the 'g' mean under VIRT in “top” on linux?

The output from "top" for a server of mine says this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 64860 mongod 20 0 16.721g 81016 16820 R 0.7 4.7 18:37.66 ...
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11 views

ClouderaVM in 2 Different Machines are not Pinging Each Other

I am using cloudera-quickstart-vm (VirtualBox) in 2 different systems with bridged mode of networking to implement hdfs (in a distributed manner). Host System: Windows 7 Guest OS: CentOS 6.5 /etc/...
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99 views

Two network cards, one directly to internet, other in LAN

I need some insight in my thinking so that I don't do something completely stupid. I have two physical network cards on my computer, one card/interface offers a handful of services and the other is ...
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1answer
478 views

Yum repo with python 2.6 on Centos7

I need to run Nodejs 4 on a CentOS 7 machine. I have a limited internet access on this machine and basically can only hit Yum repositories (I can add new ones). Since Nodejs 4 is not available even in ...
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vote
1answer
18 views

How to copy file only if file sizes between src/dst differ?

I wish to perform a file copy like: cp --verbose /srcfile /dstfile But I only wish to perform the copy if dstfile does not exist or if the dstfile filesize differ from the filesize of srcfile. How ...
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vote
1answer
166 views

Security regarding nginx + php on CentOS 7 with OwnCloud 9

I'm trying to setup a OwnCloud Server v9 for my freelancing purpose. SPECS: - CentOS 7 - nginx - php I'm a little bit confused. I can find only the info about the PHP Version 5.5 in the ownCloud 9....
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2answers
96 views

Error SSH to a Centos 7 VM (Host-only)

I have the following setup: Host System: Debian Wheezy VirtualBox System: Centos 7 Network Adapters: NAT and Host-only On the host system I can "ping" the VM machine, when I try to ssh I get the ...
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2answers
103 views

GCC and G++ upgrade to 4.8+ on CentOS 6.7 32-bit

I used: yum -y --nogpgcheck install devtoolset-3-gcc devtoolset-3-gcc-c++ to upgrade gcc and g++ from 4.4.7 to 4.8+ it installed : devtoolset-3-gcc-4.9.1-10.el6.i686 devtoolset-3-gcc-c++-4.9.1-...
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32 views

Reverse DNS setup not working - BIND on CentOS 7

I haven't setup BIND before but am quite knowledgable with DNS (I'm from the Windows world). I'm having a reverse DNS issue. Forward DNS is working fine for the zone int.linuxlab Here are the ...
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2answers
628 views

How to have MySQL entitle the machine's root user?

I'm trying to run mysqlcheck. Its failing with: $ sudo su - # mysqlcheck --auto-repair --all-databases mysqlcheck: Got error: 1045: Access denied for user 'root'@'localhost' (using password: NO) when ...
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38 views

Trouble setting up mail server(postfix, dovecot) on centos

I'm having trouble setting up my mail server, i have followed this tutorial: http://www.krizna.com/centos/setup-mail-server-centos-7/. Now i'm trying to send mails to my outlook adress, but i can't ...
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29 views

pulseaudio halt with C-Media usb audio

pulseaudio will enter an uninterrupted wait when my c-media usb audio device is plugged in/activated. pulseaudio -k wont kill it (even with autospawn = no), nor kill with SIGINT or SIGTERM), and the ...
1
vote
1answer
26 views

One user, multiple desktops tigerVNC

I was wondering if there was a way to "share" a user through tigervnc such that if both are logged in, both see their own desktops. I need something similar to screen in ssh. I've tried connecting ...
2
votes
1answer
126 views

Operating System not found, to install CentOS 7 on VMWare Workstation 12

I want to install CentOS 7 on VMWare Workstation 12. After I created a virtual machine and clicked "Power on this virtual machine", I got the following error: What is wrong?
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2answers
87 views

Why is a user only added to one group at a time?

I have a limited knowledge of Linux systems, so bare with me :) I'm trying to add Apache and a user called admin to the same group on CentOS. When I run id admin I get groups 1000 (apache) and group ...
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2answers
111 views

Grub not listing the new kernel while booting

I recently updated my kernel on CentOS 6.7. That also cleaned up all the older versions, which also updated my /boot/grub/grub.conf, it has a single entry (of the new kernel). Now, when I rebooted, ...
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1answer
41 views

centos - cannot create two symlinks to /var/www/html

I have two users chrooted to their home directories, that need access to /var/www/html. I tried to solve this by creating a files directory within their directories and in that files directory create ...
0
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1answer
129 views

Adding --no-check-certificate to yum repositories

I have added virtio-win.repo according to this guide. The content of /etc/yum.repo.d/virtio-win.repo is now [virtio-win-stable] name=virtio-win builds roughly matching what was shipped in latest ...
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7 views

Postfix and Dovecot Issue

I am a dovecot user. I have assigned 1000 MB space to one of my clients. Now, if mail is sent to his email, an over quota message bounces back. I checked from the server, it is only showing 300M used. ...
4
votes
1answer
205 views

Apache can't access /var/www/html

Apache is denying access to all the files in /var/www/html. It claims it's because of file permissions, but the whole /var/www directory is chmod 755 and owned by apache:apache. Apache error log: ...
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48 views

How to install packages in remote server without super user

Here's the thing: I have access to a remote server (ssh) to carry out a project of mine. (It has better specs.) I don't have super user privileges on this system (obviously!). Hence, I can't do any ...
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0answers
27 views

My old CentOS 6 computer died. How do I make a new one boot with the old HDDs?

As the title says, I have had a CentOS 6 box for some years, but recently it died. Since it was quite old, I've upgraded it with a whole new box (new psu, motherboard, RAM, CPU), but kept the HDDs. My ...
2
votes
1answer
91 views

Download Java 1.7.0 JDK for CentOS

I have a CentOS 5.2 32-bit machine, which I can't connect to the internet. As Java Oracle does not seem to work, I would like to try using OpenJDK, but therefore I need to install OpenJDK first (...
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19 views

Creating a self-contained installation file for pymssql for CentOS

I'm trying to deploy a Python application on a machine that due to system and organisation requirements can't have gcc installed on it, so I need to create a self-contained installation file for ...
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65 views

Has the installation of Google Authenticator chaged for CentOS 7?

ANOTHER UPDATE Did some more research and found this link, which talks about the repo issues I had. I'm going to check it out, and if it works, post a modified version for CentOS7. UPDATE So I just ...
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vote
1answer
133 views

dpkg-reconfigure on CentOS (for openssh_server)

Systems that use the apt packaging system have access to a command called dpkg-reconfigure which, depending on the package, re-runs some setup commands. At least on Ubuntu, it's possible to ...
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2answers
86 views

CentOS 5.2: GLibC version too old (libgio issue), upgrade to which GLibC version

I'm working on a CentOS 5.2 system. The application I'm trying to launch, refuses because a reference to libgio-2.0.so.0 seems not to exist. This seems to be due to the GLibC version, so I had ...
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110 views

Vagrant can't rsync Windows

I have a problem with Vagrant. I'm using a CentOS vm. The vagrant up command sucessfully maps files from Windows to the CentOS vm, and gives no errors when bringing the machine up. EDIT: $...
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0answers
10 views

GNOME TopBar “Applications” & “Places” switched places(

I'm using GNOME 3.14.3/3.14.4 on following system: $ cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core) $ uname -a Linux X 3.10.0-327.10.1.el7.x86_64 #1 SMP Tue Feb 16 17:03:50 UTC 2016 ...
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17 views

What is the replacement for intr option when mounting NFS?

intr / nointr This option is provided for backward compatibility. It is ignored after kernel 2.6.25. says the man nfs(5). I'm facing the problem when NFS client blocks forever when accessing a ...
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83 views

Ping: unknown host google.com on CentOS 7 in Virtual Box

I'm attempting to talk to the outside world (the internets) via CLI. I'm using CentOS 7 on Virtual Box and I can't get anything to work. I've modified just about every file on the system, restarted ...