Questions tagged [centos7]

CentOS is a Linux distribution standing for "Community ENTerprise Operating System" and is a rebuild of "Red Hat Enterprise Linux" (RHEL), belonging to the same company that distributes RHEL (Red Hat, Inc.). The "CentOS7" tag refers to versions 7.x-xxxx of CentOS, working only on 64-bit hardware. Maintenance updates for CentOS/RHEL 7 will stop on June 30, 2024, with full updates ceasing in winter of 2019.

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How to add a DUD driver to CentOS/RHEL 7 media (without network)?

I'm working on making an offline installer for something I currently build using PXE and RHEL 7. The servers concerned (Dell 14G) need an addition driver loaded for the RAID controller. In the PXE ...
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“Symbol 'grub_efi_secure_boot' not found” after disk replacement on boot (CentOS 7.5, RAID1)

Recently I had to replace a faulty HD at a Centos 7.5 server with RAID1 (2 x Samsung NVMe disks) After disk replacement, server booted using the other drive, I copied the same partitions at the new ...
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dovecot: can't open pid

im new here :) after 2 days of googling and trying whatever i could I can't get rid of this: systemd[1]: Can't open PID file /var/run/dovecot/master.pid (yet?) no such file or directory i found info ...
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cron takes UTC time instead of local time

I've a script set in cronjob to run at 00 hours but it runs 5 hours earlier ie at 7PM local of earlier day. I mean it was supposed to run at local 00 hours of local time but it ran at 00 hours of UTC/...
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Centos 7 Sofia-sip dependency for Janus sip gateway

I trying to install Janus WebRTC Gateway on Centos 7. But when I run sudo yum install sofia-sip-devel I have this message No package sofia-sip-devel available. I found this answer in Janus google ...
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Why is Apache trying to kill a process on startup and why would that cause a failure for Apache to start?

I was installing a new cert like I've done dozens of times before. I copied the names crt, key, bundle files as backup and gave the new files the names of the old files. Then I restarted apache. It ...
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MariaDB optimal configuration on CentOS

I have a cloud server with the following config: CPU:8 vCore (4 Core, 4 Processor) RAM:16 GB SSD:240 GB This server features CentOS7-64bit with MariaDB running as the database. (Date bug is fixed) ...
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Iptables - port forwarding issues

I use a CentOS 7 as a gateway server. It has two network interfaces, ens28 and ens29. The ens28 uses a private 192.168.x.x network, it is considered as the WAN. Ens29 is the LAN area with a 172.16.0.0 ...
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df differs from du a lot, nfsd service seems matter

I know there have been a lot of discussion on the df/du discrepancy topic. But here I’d post a special issue and ask for some hints. here is the detail( with a hardware raid5 with 6 sas disks) system ...
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Successful connect to a closed port with FirewallD

Please help to understand why FirewallD allows me to connect to one port but blocks the second. There is a Docker container with transmission: 5cf144eed6f2 maksim77/transmission "/bin/sh -c ...
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Booting a squashed filesystem from ISO

I am trying to create a UEFI bootable CD ISO with a squashed filesystem from a virtual machine, which I provisioned with the stuff I need. To explain: I use packer and a kickstart file to install ...
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`connect to private/policy-spf: No such file or directory` when receive mail by postfix in centos 7

My system is centos 7 with postfix,dovecot,pypolicyd-spf, opendkim. I can send mail but cannot receive mail, I notice warnings as below: Feb 6 20:01:09 srv-8327 postfix/smtpd[20391]: warning: ...
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Video Encoding/Trans coding Conversion Dedicated Server [closed]

I am looking to buy a dedicated server for my video project, I have multiple video upload at the same time each video I upload is about 2-3 GB in size and about 2-3 hours in length (TV Series/Movies). ...
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Setting FQDN with external domain name

I have a Centos 7 server which has tens of domain names and IPs. The IP addresses are pointing to my server. Each domain name is pointing to its own IP via A record. I want to configure my FQDN in ...
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Cannot start wildfly with systemd

Centos 7 Wildfly-16.0.0.Beta1 JDK 1.8.0_212 I cannot start wildfly with "systemctl start wildfly" but I can start it with "/opt/wildfly/bin/launch.sh standalone standalone.xml 192.168.56.200 &" ...
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Configure Email Routing without cpanel

i am using a centos 7 dedicated server with cloudflare and cpanel ( license expired ) All DNS records of zoho mail are set now i can't receive any external email , after alot of reading and searching ...
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Stopping firewall on CentOS 7

I am having a problem with my CentOS 7 server By accident i run command # firewalld Then i found that the log file in /var/log/firewalld was updated with the following 2020-11-26 12:59:08 WARNING: ...
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How to add hot spare to software RAID1?

I have a CentOS 7 server. It is running a software RAID 1 mirroring three disks. I want to add a 4th disk to act as a hot spare. My intention is that in the event of a failure of one of the three ...
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cant ping or ssh into centos7

This might be a centos issue. I have few hosts(ubuntu 16 and centos7) in subnet 10.1.10.1 while the client machine is in 10.1.1.1. The networking seems to fine. I can ping and ssh into all ubuntu ...
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OpenStack error when converting a glance image to a cinder volume

/var/log/cinder/volume.log shows the following error when converting a glance-registered QCOW2 image to a cinder volume. local variable 'tmp' referenced before assignment failed to copy image to ...
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Forbidden You don't have permission to access this resource

I have recently installed apache 2.4 plus mod_ssl I am using this apache as a proxy server and redirecting traffic to tomcat. The issue I am facing right now is that everything works without HTTP but ...
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execute a shell script and all its commands as a specific user

I have a shell script myShell.sh and it runs the following commands in it: docker run --name sample_container sample_image:tag I want to run this script AS WELL AS the command as a specific user - ...
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Running Tor On Centos 7

hello I want to run TOR on Centos7. Tor is installed Successfully and then i start tor using this command systemctl start tor after this command i check the status of tor using systemctl status ...
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How remove samnage(Solarwinds_Discovery_Scanner) from centos 7?

Does anybody here konw the Solarwinds_Discovery_Scanner uninstalltion process for centos 7
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drbdmeta 0 v08 /dev/vdc internal create-md' terminated with exit code 20

I am getting below error in drbd create, though my one server only having issue other server with same partationm name configured properly. [root@xxxxxx drbd.d]# drbdadm create-md filerun read from ...
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CentOS7 keepalived not failing back during vmware snapshot with longer than average unstun time

OS: CentOS7 Keepalived version 1.3.5 (Release 16.el7) Yum available version from repo: 1.3.5 Release 19.el7) I have experienced this issue accross multiple CentOS7 VMs with the same keepalived version....
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403 error after installation of ZeroSSL

I have an application that i run on an intranet server that runs on tomcat and OS being CentOS 7. I recently installed an SSL from ZeroSSl. The url https://rndops.iitg.ac.in/rndops/action.htm throws ...
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Minimize CentOS image

I want to reduce the size of my CentOS installation. So I want to uninstall some extra packages if possible. Example: centos-logos 70.0.6 So I want to see if there is a package that is dependent on ...
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Open FTP passive port on GCP for CentOS

I have created the network rules for allowing the traffic on passive ports range 49152-65535 in Google Cloud, but I am unable to login into the file manager using FileZilla. It still shows "227 ...
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Add a new plugin to Nagios Core

I creat a specific plugin by python to check the inputs status for a controller, and I putted the file in /usr/local/nagios/libexec, After that, I define the plugin in commands.cfg like that : define ...
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issue in moving home2 location in DirectAdmin control panel

I moved the home location from Primary HD to secondary HD and the website started to work from the home2 location whereas the emails are still in the home location (PHDD). Kindly advise on how to move ...
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Rsyslog doesn't create log files on CentOS7

I have the following configuration file in "/etc/rsyslog.d/10-my.conf" # This file is managed by Puppet, changes may be overwritten if $programname == 'hello' then -/var/log/test/test.log & ~ ...
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CWP | User login --> uerror — Cannot login as a user in CentOS 8 using Centos Panel

I'm really feeling very frustrated... 2 days now and I couldn't figure it out. Without a good reason, I had a "uerror" when trying to login into CWP user panel. This is a screenshot I'm ...
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Error establishing a database connection on a fresh Wordpress installation

I've installed a fresh copy of Wordpress on CentOS 7/Apache but am getting the dreaded "Error establishing a database connection" error message when navigating to the site to complete the ...
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CentOS 7 - Cannot change subnet mask

I just noticed that this CentOS 7 server's subnet mask is 255.255.255.0. It should be 255.255.255.240. # ip a show ens32 | grep ens32 3: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc ...
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After rebooting docker node, it will ask to join or init swarm

I have once server with docker as follows. docker-ce-19.03.13-3.el7.x86_64 docker-ce-cli-19.03.13-3.el7.x86_64 containerd.io-1.3.7-3.1.el7.x86_64 CentOS 7.8 minimal I run docker swarm init command ...
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Intel 82599 in CentOS 7 - No suitable device found for this connection

I have recently installed a server with CentOS 7, this was installed whilst the network card was present. The card is a Intel 82599ES 10Gb LC fiber NIC attached to the PCI slot of the server. The ...
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Time is not synced in centos7.3

I have installed stock CentOS7.3, and install chrony yum install -y chrony systemctl start chronyd systemctl enable chronyd If I start CentOS, the time is not synced: $ timedatectl NTP enabled: yes ...
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CentOS 7 - firewalld[8509]: ERROR: COMMAND_FAILED

[root@localhost ~]# systemctl status firewalld -l ● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: ...
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RHEL 7.1 iscsid fails to get target as networking doesn't seem to have started

I have 2 RHEL 7.1 VMWare vm's (server and client) connected on a private vmware network. They each have 2xe1000 nics using teaming. I can see the teaming works as expected. I've also configured ...
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Multiple instances of CRON_TZ inside a cron file (CentOS)

Is it possible to have multiple timezones in the /etc/crontab file, like below? CRON_TZ=Europe/Paris */20 * * * * root /home/user/script.sh >/dev/null 2>&1 */5 * * * * root /home/...
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How to create a Linux virtual machine in AWS with multiple network interface cards each having a public IP

AWS. Centos 7.5 m5.large EC2 instance. VPC with 2 subnets. The instance has two network interfaces, one per a subnet. A Network Security Group is configured to allow all TCP inbound and outbound ...
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How to run clamd by systemd as daemon on Centos 7

# rpm -q centos-release centos-release-7-5.1804.el7.centos.2.x86_64 # rpm -qa clam clamav-filesystem-0.100.0-2.el7.noarch clamav-data-0.100.0-2.el7.noarch clamav-lib-0.100.0-2.el7.x86_64 clamav-...
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Networking not working on Docker / Centos 7.9

I'm running Docker on Centos 7.9.2009 and have a very strange issue. The containers do not have network access and cannot be accessed from the host. I've searched for potential solutions, a lot of ...
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Remote Desktop to KVM Virtual Machine on Centos 7

I have a virtual machine created on centos7. I want to remote connect to it via another computer besides the host. I can not seem find how to access it. I have it set up with a username and password. ...
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Tomcat 7 Service Inactive

Very new to Linux and currently tasked to install tomcat 7 in centos 7 os. I followed the instruction in How To Install Apache Tomcat 7 on CentOS 7 via Yum. Everything seems to be ok and did not get ...
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Why is varnish not restarting after I change port

Solved. See my solution below My system: 1. varnish 6 2.Centos 7 controlled on cwp pro panel, 3.webserver configuration: Nginx & Varnish & Apache ([Varnish Conf]) Additional Options: php-cgi/...
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After CentOS 7.4 upgrade samba panic

Hi we're running a Samba server 4.6.2 with Microsoft Active Directory integration. After upgrading CentOS 7.3 to version 7.4 our Samba server started throwing errors. Some users are unable to copy ...
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error downloading packages with yum : permission denied

i want to install simple screen recorder on my centos 7 , but when i hit command yum install simplescreenrecorder Output was this: Loaded plugins: fastestmirror, langpacks Loading mirror speeds ...
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Restart HTTPD on CentOS 7

I've an instance running CentOS 7. And I'm having a difficulty when/if I restart httpd. systemctl list-unit-files | grep nginx nginx-debug.service disabled nginx.service ...

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