Questions tagged [centos]

Community ENTerprise Operating System; a Linux distribution based on Red Hat Enterprise Linux widely used on web servers.

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How to resolve authentication error when using iSCSI target configuration on CentOS 7?

I am attempting to setup an iSCSI target, with one block LUN which is a zfs zvol on a CentOS 7 machine. I've only ever used iscsitarget and the /etc/iet/ietd.conf file on ubuntu systems. I have this (...
Your_Structures_Fine's user avatar
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Mount shared Windows 10 folder on virtual machine VMware Linux CentOS mount error(13): Permission Denied

I am trying to mount a shared folder from Windows 10 to a VMware virtual machine Linux CentOS with this command: mount -t cifs //ip/folder /mnt/win -o username=xxx,password=xxx,file_mode=0644,...
Serban Ciofliceanu's user avatar
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1 answer
685 views

Can I run qemu on vps, not dedicated server? It seems that virtualisation not enabled. Is it possible?

TRying to run android virtual device on centos 7 64bit. AVD uses kvm to emulate android. I am on virtual private server not dedicated. So I am already inside kvm. Tried nested virtualisation but it ...
basta burburlajev's user avatar
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622 views

Can`t download with yum on Linux CentOS

I installed Linux CentOS on a virtualbox. The internet connection is thru proxy but I understood I have to modifiy resolv.conf. I added the proxy, username and password and then I tested with the ...
Serban Ciofliceanu's user avatar
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73 views

ZFS 0.7 version in Centos 7.6

i am trying to install zfs in my centos 7.6 with kernel 3.10.0-957.el7.x86_64 using this guide: https://github.com/zfsonlinux/zfs/wiki/RHEL-and-CentOS and doing a yum install http://download....
avant's user avatar
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Unable to run chorme headless on Amazon Linux / centos 7 for (puppeteer)

I have install all required depnendencies after that running this command $ ./chrome --headless --disable-gpu --no-sandbox --disable-setuid-sandbox --screenshot https://www.chromestatus.com/ It shows ...
Mohammad Idris's user avatar
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1 answer
383 views

I cannot use all my disk space on centos

I have a centos 7 dedicated server with 60GB or SSD disk. the fact : sfdisk -uM -l /dev/sda gives: Disk /dev/sda: 61440 cylinders, 64 heads, 32 sectors/track Warning: The partition table looks like ...
Wael Arafet Jani's user avatar
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1 answer
58 views

What does this "*:down" mean when using linux cmd "lsof" in Centos?

I try to check a process fd using the linux cmd "lsof" in centos. lsof -p 22316 | grep -i tcp confd 22316 root 39u IPv4 18144132 0t0 TCP localhost:4565 (LISTEN) confd 22316 root ...
bubu0321's user avatar
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Create a High Avaiebily cluster Centos in NON-Geograpical regions

I have been looking to create an Extreme High available cluster in Centos 7.6. They have to be at least 2 in same data center 3 or more different Non- geographical locations Ability to expand cluster ...
Mike van Eckendonk's user avatar
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686 views

Switch route with NetworkManager connectivity check

I'm having a hard time getting the network manager connectivity check to work. The goal is to have a failover gateway, and switch between them by increasing the metric on the offline one. To test ...
RASG's user avatar
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Docker DNS issue (container-level)

I have a trouble with DNS system at a private docker network after installing some third-party bash-script (into container). Entry: My host system is CentOS 7.6, docker version - 18.09.6, build ...
novascriptum's user avatar
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0 answers
660 views

Installing latest stable version of nodejs on centos 7

I'm trying to install the latest stable version of nodejs on server with centos 7. But after installation, the version remains the same as before: node -v ...
Jango's user avatar
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Wordpress Home page only works. The rest of the pages and post returns Nginx 404. CentOS Linux 7.6.1810

I had successfully installed a wordpress site using the webmin but the problem is after i changed the permalinks settings of wordpress to '%postname%' the rest of the pages except the home page ...
Allyn Cuizon Cubero's user avatar
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1k views

job state=failed reason=nonzero exit code, SLURM

I'm new to Slurm, I have been trying to run a simple job. I'm running Slurm on top of a VM. Here's my slurm.conf: SlurmctldHost=master #SlurmctldHost= # #DisableRootJobs=NO #EnforcePartLimits=NO #...
Ash Bougui's user avatar
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413 views

Installing tensorflow-model-server on centos/rhel

After hours of failed attempts I have come here. I need to install tensorflow-model-server on a rhel box but the instructions are lacking and the manual compile failed. These are the instructions for ...
Alex F's user avatar
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2 answers
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Linux Mail Blocked By Gmail 550

I have a website set up on a CentOS server which has a contact form on it set up to send mail to a gmail address. However the mail is being blocked by google with the following error: Diagnostic-...
Edward144's user avatar
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Centos Web Panel not secure solution

Good day. I am new to web development and is still trying to learn a lot of things. Basically, I tried making my own linux web server**(Centos)** provided with a static ip I purchased. After the ...
marvin castro's user avatar
1 vote
1 answer
1k views

How to revert GCC installation on Centos 7

I recently installed gcc 6.3.0 following the instructions on this site as it is the supported compiler for the 2018b release of Matlab and Simulink. However due to compatibility issues with other ...
S HH's user avatar
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Permission denied when systemd-sysctl service starts and tries to write to file in /proc/sys/user/

I am trying to enable user namespaces on Docker. This of course requires user namespaces to be enabled in the kernel. One of the steps to enable user namespaces in RHEL/CentOS is to: echo "user....
gfields's user avatar
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FTP: ftp_home_dir not existend

Okay so i installed the vstfpd (and ftp) i set the /etc/vsftpd/vsftpd.conf File to the basevalues. Now if i try to execute: setsebool -P ftp_home_dir 1 It doesnt work. Error: Boolean ftp_home_dir ...
Stefan xyz's user avatar
1 vote
1 answer
4k views

Error checking storage configuration (centos 7)

I tried to install linux centos 7 (dual boot), this is the first time i install linux so i've been following some tutorial. In the installation destination I've got an error message Error checking ...
Clarisa Valentin's user avatar
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461 views

csf/lfd doesn't actually block IP's

I use CSF/LFD on CentOS 7 and DirectAdmin and my logfiles are filled with lines like these: Mar 11 20:04:07 host kernel: Firewall: *TCP_IN Blocked* IN=ens160 OUT= MAC=00:50:56:96:89:93:38:10:d5:70:a3:...
Rogier Maas's user avatar
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1 answer
3k views

How to use yumdownloader to download specific version of a source rpm?

by using folloing command: yumdownloader --source 'package-name-without-version' It will only download the newest source rpm of said software. how do I download specified version of source rpm ...
Sajuuk's user avatar
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Can passwords be longer than 79 characters in Centos/RHEL 7?

Installing Centos 7, I discovered that passwd is limiting the length of user passwords when they are set, without informing the user, as per this five-year-old bug report. This means any password ...
WackGet's user avatar
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609 views

Docker add custom DNS server

I have a DNS server running on a CentOS 7 machine at 10.8.0.1. On this machine, I have some docker images running on a subnet of 10.8.1.0/24, without masquerading. I'd like the docker images to be ...
László Stahorszki's user avatar
1 vote
1 answer
2k views

'invalid pointer' with ODBC on CentOS 7

I'm running into an 'invalid pointer' with ODBC on a CentOS 7 machine while developing a new Asterisk (PBX) configuration. A previous server with identical set-up (unixODBC version 2.3.1) works fine. ...
Olivier's user avatar
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197 views

Horde installation failure CentOS 7

I'm trying to install the Horde Groupware Webmail Edition 5 on CentOS 7 following this documentation, installing horde with pear and the installation is failing on my step number 5. pear channel-...
user2968390's user avatar
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71 views

CentOS doesn’t show my USB drive

When I attached a US drive to my computer with CentOS, the indicator lamp of the USB drive is lights. But when I type fdisk -l in the terminal, there is no information on the USB drive. It is as ...
Xinyang Zhang's user avatar
1 vote
0 answers
60 views

Centos - Can not remove file as Root (no error, nothing)

as stated in title, I cannot remove file from centos as the root user. rm filename.php rm: remove regular empty file ‘filename.php’? y Nothing happens, file still in place OS: CentOS Linux release ...
Boris's user avatar
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1 vote
0 answers
55 views

Whats the equivalent command for "docker.io -d -b br10 &" in centos7

I am learning docker and need your help in below: I have created a bridge network and want to add it to docker. The tutorial was performed on ubuntu so the tutor user "docker.io -d -b br10 &" to ...
prabodh swain's user avatar
1 vote
0 answers
12k views

enabling intel vt-x virtualiziation in asus motherboard

motherboard specs: asus strix h370-f https://www.asus.com/us/Motherboards/ROG-STRIX-H370-I-GAMING/specifications/ cpu: intel i7-8700 non k I am trying to work with virtual box, vmware etc and i ...
Algorita's user avatar
1 vote
1 answer
478 views

how do I ssh Linux VM over virtualbox from windows

I spin up a Centos7 virtual machine over Virtualbox and trying to access via ssh from putty over windows from another machine in a same network, below are the details of my VM: IP addresses: Windows ...
piyush sachdeva's user avatar
1 vote
0 answers
108 views

Give access to CloudFlare IPs in iptables

I trying to DROP all requests except CloudFlare requests, and give SSH access to a certain ip. so I write this rules : iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -P FORWARD DROP ...
MajAfy's user avatar
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0 answers
337 views

Cannot do su in CentOs

I have troubles with su on system that is attached to Active directory. [user1@host_test ~]$ su - username Password: su: Permission denied [user1@host_test ~]$ But i can access server with ssh [...
UNIm95's user avatar
  • 125
1 vote
0 answers
3k views

Unable to update yum packages using CentOS 7.5

I have been getting the following error while updating yum packages. http://mirror.centos.org/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd....
dp7's user avatar
  • 111
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0 answers
2k views

Smartcard authentication on CentOS

I tried to implement a smart card authentication in a Samba4 domain (Samba AD). Currently I have two domain controllers (CentOS), a file server and several clients (CentOS and Windows). In regards to ...
Lesuno's user avatar
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1 vote
0 answers
938 views

Tunnel Gre between two hosts (vps and dedicated server)

Hello guys i need to resolve this problem (all server have installed centos 7): i'm trying to create a gre tunnel through vps (in Italy - OpenVZ) and a dedicated server (in Germany), but they do not ...
Alessandro Devite's user avatar
1 vote
0 answers
379 views

Telnet not working from a specific server to specific port

I am using 2 servers (A and B) centos 7. I am trying to telnet from A to mail.smtp2go.com serverA$ telnet mail.smtp2go.com 2525 Trying 45.33.53.153... telnet: connect to address 45.33.53.153: ...
Dirty_Programmer's user avatar
1 vote
1 answer
197 views

Error when attempting to boot Centos 7 install from pen drive

I followed the instructions here: https://wiki.centos.org/HowTos/InstallFromUSBkey In an attempt to install Centos 7 in a work laptop which currently only has FreeDOS. This was the exact command I ...
aarelovich's user avatar
1 vote
0 answers
922 views

VirtualBox: menu / task bar not visibile in seamless mode

I have the following setup: Host: Windows 10 Guest: CentOS 7 VirtualBox: 5.2.18 With the latest guest additions installed I can enable seamless mode for the virtualized CentOS but that hides the ...
Markus L's user avatar
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0 answers
204 views

Why is my custom centos kernel not booting? No source changes were made

I followed this guide to rebuild my 3.10.0-327 kernel (CentOS 7.2): https://wiki.centos.org/HowTos/Custom_Kernel I will be making changes to it, but even if I make no source changes, it does not boot ...
ekk1240's user avatar
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1 vote
0 answers
131 views

ffmpeg: mix/merge multiple mp3 files, some do not mix

I am trying to merge multiple mp3 files on top of each other on a CentOS 7 server. I am trying with ffmpeg but I have mixed results. When mixing 4 files, the last one for example does not mix with ...
C. Ovidiu's user avatar
  • 111
1 vote
0 answers
414 views

squidGuard does not filter traffic

I am trying to setup squidguard with squid proxy. It does not seem to capture any traffic or does not match any sources Package details Proxy: Squid 3.5 OS: Centos 7 SquidGuard Verion: ...
muhammad asif's user avatar
1 vote
0 answers
1k views

Cannot read clients from nas table in freeradius only with clients.conf

I have installed freeradius on Centos. The MySQL database is populated with some data for testing, and the freeradiusd.conf and sql.conf are configured. The RADIUS server is able to connect with the ...
ahmad charafdin's user avatar
1 vote
1 answer
833 views

CentOS 7 Virtualbox VM SSH Connection Suddenly Refused

I am new to linux and am working with a minimal CentOS 7 installation on a VM running on Virtualbox with a Win10 host. Up until today, I was able to use PuTTy and WinSCP to SSH into the VM from the ...
deflator's user avatar
1 vote
1 answer
663 views

Terminal doesn't show the server name after using ssh - Centos7

Please notice that I don't have any problem with hostname and I can change the hostname by configuring /etc/hostname , and it is easily shown on the terminal. My problem: I just setup two servers on ...
sf31's user avatar
  • 11
1 vote
2 answers
628 views

Paprefs for CentOS

Has anyone been successful in installing paprefs on either CentOS 6 or CentOS 7? I tried to unpack the rpm at https://centos.pkgs.org/7/nux-dextop-x86_64/paprefs-0.9.10-8.el7.nux.x86_64.rpm.html, but ...
walksignison's user avatar
1 vote
1 answer
730 views

Configuring Varnish as a permanent persistant storage caching

Currently we have a static storage for our web app, and since the data structure has been really flat; we are in the process of setting up a varnish on the new storage set-up so that it fetches the ...
h.safe's user avatar
  • 11
1 vote
0 answers
489 views

Dual monitor setup with Intel NUC7i5DKNE and CentOS 7

I'm trying to configure dual monitor setup with my Intel NUC7i5DKNE and CentOS 7. The NUC have two HDMI outputs and according to the manual supporting up to 2 screens with 4K. In any case, I don't ...
George Salukvadze's user avatar
1 vote
1 answer
2k views

Listing directory on vsftpd server with FileZilla fails with "The data connection could not be established: ETIMEDOUT - Connection attempt timed out"

I am trying to setup vsftpd on my server, it works, runs and connects. But when trying to connect to the server with FileZilla, I get the following error: Status: Connection established, waiting for ...
Martijn Deleij's user avatar

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