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Questions tagged [centos]

Questions specific to the CentOS Linux distribution. Use this tag if your question relates to how the CentOS distribution affects your problem; do not use it if you just happen to be using CentOS and your question is about a specific configuration detail or syntax.

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1answer
51 views

Can I use centOS and Redhat's JDK-11 altogether in my production server

As per the Oracle OpenJDK policy, there will not have any LTS support anymore, but Redhat OpenJDK will continue to have LTS support so far we have seen. Our current server is based on CentOS 7 and ...
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1answer
36 views

What's the difference between the `/dev/mapper/VolGroup-lv_home`, `/dev/VolGroup/lv_home`, and the `/home`?

What's the the /dev/mapper/VolGroup-lv_home, /dev/VolGroup/lv_home, and the /home? and what's the difference between them?
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1answer
386 views

Mount: wrong fs type, bad option, bad superblock on /dev/mapper/VolGroup-lv_home

When I mount my /dev/VolGroup/lv_home there get error: [root@localhost VolGroup]# mount /dev/VolGroup/lv_home /home/ Mount: wrong fs type, bad option, bad superblock on /dev/mapper/VolGroup-lv_home,  ...
3
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1answer
153 views

The Systemd Journald use too much memory and don't respect SystemMaxUse and RuntimeMaxUse?

I found the systemd-journald takes like 1GB+ of memory. After some searching I set the value of SystemMaxUse and RuntimeMaxUse both to 8M in "/etc/systemd/journald.conf". Then restart the journald. ...
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0answers
51 views

NTLMv2 authentication with Centos7

I have a Centos7 VPS with Apache 2.4 and i use it only as a web server. I use web services of a company that needs NTLMv2 authentication. I use CURL to get the data for the web services for other ...
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1answer
35 views

How to use complete disk space in the lvm - CentOS

I have created a new physical volume using /dev/sdb. I ran lsblk command and following is the output. NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sda ...
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1answer
47 views

AD user can not login to IPA client after build AD-FreeIPA trust

I build a trust relationship between FreeIPA and AD, and add some AD users to FreeIPA server, all those users can successfully login to IPA server side. But can login to IPA client. Here is the ...
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0answers
39 views

IPTables blocking docker container internet access on CentOS

I have two (virtual) servers running CentOS with Docker installed. We have installed IPTables and everything works as expected. I then adapt the service file: /usr/lib/systemd/system/docker....
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0answers
20 views

cntlm doesn't start in Centos7

I have a Centos7 server with apache. I want to get some data from a windows server that uses NTLM v2 authentication. I used this tutorial to install cntlm but the service doesn't start. I generated ...
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1answer
136 views

PHP-FPM: 'No such file or directory' error from nginx/error.log. Path or permissions issue? [closed]

I am getting a "FastCGI sent in stderr: "Unable to open primary script: /var/www/mediawiki/index.php (No such file or directory)"" error when I enter my wiki address in a browser bar. Here is my PHP-...
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1answer
36 views

I lvextend-ed the /, but there is still only 50Gbytes

I have pved, /dev/sda and /dev/sdb, and I vgextended the /dev/sdb to the default VolGroup, and lvextended the /. now the lsblk shows this: [root@store01 ~]# lsblk NAME MAJ:MIN ...
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1answer
111 views

KVM Centos 7 - unable to connect to virsh console

I have installed KVM server and all works fine. while I reading the book I need to connect virtual machine through the console. I mean, with virsh console machine. but when I do it, the virsh hangs ...
1
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1answer
101 views

How to enable TLSv1.3 in Centos with Apache2

I am using CentOS 5 with Apache2. Into an additional config file: /etc/apache2/conf/extra/ssl.conf I have put these lines: SSLHonorCipherOrder On SSLProtocol all -SSLv2 -SSLv3 -TLSv1 -TLSv1.1 ...
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1answer
43 views

Why package installation with yum show wrong source repository?

I have a brand new CentOS 7 VM. Right after a global yum -y update I'm trying to install additional packages, for instance net-snmp. Package net-snmp 1:5.7.2-33.el7_5.2 (...
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1answer
28 views

Centos6 - Log files copied from the server

Is there a way to log any files copied from the server to a PC on the network? It would be a specific directory on the server (Centos 6). I have tried searching for an answer to this but to no avail ...
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0answers
51 views

How to safely reconfigure gcc on my Linux system?

I am trying to install a program (github.com/zhenglz/dockingML) on CentOS 6.10 and at the end of the installation, it gave an error saying that Glibc-2.14 is necessary. I upgraded the current Glibc ...
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0answers
110 views

Can't start tomcat in digital ocean's CentOS server?

I am trying to configure a CentOs server in DigitalOcean. I have followed all those steps mentioned in their website.This is the link of various steps to configure server. DigitalOcean. I followed all ...
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1answer
70 views

Generating default DKIM keys: Cannot determine host's domain name, so skipping default key generation

I'm following this guide https://www.linuxtechi.com/configure-domainkeys-with-postfix-on-centos-7/ When I get to this section, it gives an error # opendkim-default-keygen Generating default DKIM ...
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1answer
65 views

Ports not really open after firewalld command

OS: CentOS 7 This is a question that is bordering on two issues. I have a docker machine running where I recently installed the PLEX container from linuxserver/plex. The current problem is that I ...
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0answers
10 views

Assigning users to serial device server

I'm working on a server (CentOS 7) that will be connected to a serial device service. I also have 6 client machines. The SDS makes the devices show as actual devices in linux and can be controlled by ...
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0answers
75 views

Exclude packages in kickstart file

The Redhat kickstart documentation describes how to deselect/exclude packages in the packages section - i.e. one may put - in front of a package name to exclude it. But it doesn't fully work in this ...
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1answer
100 views

Multiple monitors on linux

I am using a special configuration of monitors on some computers with two monitors. On old setup with NVidia graphics card I used xorg.conf with two screens setup. I was able to start different ...
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0answers
46 views

Why do I have duplicate bind mounts?

I'm curious if someone could explain to me what causes the odd scenario where we have a duplicate mount that appears cyclical on Centos 7 when binding a nfs directory? In our hosting environment we ...
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1answer
120 views

How to forward rsyslog logs from multiple locations to ELK and make it show in kibana?

rsyslog server template consideration for multiple remote hosts ---> link to previously answered question @ meuh, I find this post very useful as am currently working on this configuration. I ...
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1answer
33 views

install packages with yum disabled

Toda, i tried to install samba with yum, but i got an error and a series of instruction which i don't understand because it's the first time i'm working in this environment; the error and instructions ...
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0answers
38 views

schedule auto backup the directories from Centos to FTP server

i have three Centos server i want to schedule autobackup some directories to my FTP server ,FTP is already installed in all servers, i want to use crontab for schedule the backup but the SH files is ...
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1answer
19 views

Can't login to MediaWiki right after installation

When Installing latest stable MediaWiki on A CentOS machine I created a user and a password with my email as part of the LocalSettings.php file that the installer creates. After the installation ...
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0answers
36 views

Centos: no such package(s) for specific nginx version

I tried to build a customized nginx with specific nginx version with module in https://github.com/anomalizer/ngx_aws_auth I setup the nginx repo # nginx.repo [nginx] name=nginx repo baseurl=http://...
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0answers
165 views

NFS Issue w/ one mount (stale file handle)

I have 5 NFS exports from an NFS server. From the NFS client, I can connect to all except one I keep getting "Stale file handle". The only difference I can see is that the NFS exports are on different ...
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1answer
32 views

Keep outdated Centos 5.6 (Final) - Install latest Samba

Without having to update the CentOs, how would you go about updating to the latest samba? Would i have to download and compile it on the machine, or would their be a repository that handles older ...
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0answers
28 views

How can i change mysql password. I tried it. But not work.?

First i login to my server using putty. and this is my server data uname -or 2.6.32-754.6.3.el6.x86_64 GNU/Linux uname -a Linux vps-xxx-xxx.example.com 2.6.32-754.6.3.el6.x86_64 #1 SMP Tue Oct 9 ...
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0answers
20 views

Whether I can use ipmitool in the VM?

When I start the ipmi_si module: modprobe ipmi_si there gets error: FATAL: Error inserting ipmi_si (/lib/modules/2.6.32-696.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si. My environment is a ...
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1answer
212 views

change root password in CentOS 7 [duplicate]

I was reading about changing root password in CentOS 7. it's totally different from centOS 6. change root password I was wondering about the steps for example why should I change ro? what ...
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2answers
41 views

CentOS cannot see logical RAID volume

I am trying to install CentOS on a server with an HP Smart Array E200i storage controller. There are eight 67GiB drives that I joined into a RAID 10 273GiB volume. The pre-OS storage management ...
0
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1answer
102 views

I want to update the glibc version from 2.17-222.el7.x86_64 to 2.17-260.el7

I want to update the glibc version from 2.17-222.el7.x86_64 to 2.17-260.el7. Will there be any effect ? IS 2.17-260.el7 compatible to centos 7.2 as all my machines are in centos 7.2 only.
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1answer
31 views

Centos 7.5 autofs posix acl support

On centos 7.5 I have mounted NFS share(from isilon server) via autofs service. Now when I run setfacl -d -m g::rwx /path/to/share/location it gives error setfacl: /path/to/share/location Operation ...
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1answer
38 views

DHCP Lease Renew Issues with Intel NUC using CentOS 7

I am seeing the following activity in my /var/log/messages file that seems to happen every night at 02:58. The issue is that sometimes the machine comes back online and sometimes it does not. What ...
2
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1answer
93 views

What are data integrity / bit-rot protection options on CentOS 7?

I have a 2 disk CentOS 7 machine build that that I need data integrity / bitrot protection on. How can I achieve this? Note from my reading btrfs,zfs and DM-Integrity does not seem to be options. ...
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0answers
62 views

Centos https endless loading

I have OS CentOS Linux release 7.6.1810 (Core), Apache/2.4.6 (CentOS), Redmine v3.4.6. My site works nice with http, but I want add https support to it. But when I try use https it has endless loading ...
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0answers
236 views

vagrant: Error getting repository data for C7.6.1810-base, repository not found

I'm following below steps to create mesos - https://dcos-e2e-cli.readthedocs.io/en/latest/dcos-vagrant-cli.html when I run the command minidcos vagrant create ./dcos_generate_config.sh --agents 0 I ...
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0answers
29 views

How do I get my icon to show on the taskbar panel for a program?

I downloaded Mozilla Thunderbird and extracted the tar file I was given and ran the program using the terminal command line. I asked a previous question on how to create a shortcut for it so that I ...
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1answer
15 views

How to know if Jenkins is patched on CentOS 7

I've been using rpm -q --changelog package_name to check if a certain cve vulnerability has been patched on my system. However, when I'm doing the same for jenkins, all I got was Sat Apr 19 ...
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2answers
44 views

I use `ps -ef` find a `mysqld` progress, but how can I know which conf file it using?

I use ps -ef find a mysqld progress, but how can I know which conf file it using? [root@controller data]# ps -ef | grep mysql mysql 8901 1 0 15:15 ? 00:00:00 /usr/sbin/mysqld root ...
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1answer
180 views

Can't install VirtualBox Guest Additions on CentOS7 (with kernel 4.4)

I installed kernel 4.4 from ELRepo, along with kernel-lt-tools, kernel-lt-devel & kernel-lt-headers. I also installed dkms. vboxadd-install.log contains this: grep: Unmatched ) or \) The ...
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0answers
34 views

CentOs-7 environment --How to setup the public IP(ex:124.108.103.103) and specific port (ex:8080~8090)on the Docker container

Is there any way to assign the public IP and specific port to the container. So the container has the public IP and Port. Some applications or other servers can access the container under the specific ...
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1answer
19 views

How do I create an icon shortcut in the linux - Centos navigation system? [duplicate]

I downloaded a program called SmartCVS which came in a tar file which I extracted and stored into my home folder. To run the program, I use the terminal and enter my home folder and then into the ...
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1answer
292 views

systemd[1]: realmd.service start operation timed out. Terminating

I am trying to put my CentOS 7 in the domain, I put some others and it was normal, but this machine is not working. follows the configuration of the machine: Icon name: computer-vm Chassis: vm ...
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1answer
26 views

Issues in installing yum-utils on centos 7.4.1708

My centos version is 7.1.1503. When I tried installing yum-utils using yum-install it's trying the repo http://centos.myfahim.com/centos/7.4.1708/os/x86_64/repodata/repomd.xml and other mirrors on ...
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1answer
151 views

Understanding why hostname -i returns strange IP address

I am referencing the following question because it's similar but not the same: hostname -i returns strange result in linux On my CentOS 7 system, I get a strange IP address from "hostname -i" after ...
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1answer
63 views

NUC with Centos 7 crashing: Microcode SW Error Detected

I am trying to figure out why the WiFi on my Intel NUC with CentOS 7 continues to die. As info, I have 5 node Hadoop cluster and they are all configured the same (as far as I can tell), however, the ...