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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18 views

dovecot: can't open pid file

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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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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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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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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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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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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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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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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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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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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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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143 views

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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30 views

Restart HTTPD on CentOS 7 [closed]

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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35 views

Unable to ping IP Address of CentOS 7 Server

I am facing a problem that I cannot figure out and I really really need your help. I have a CentOS 7 server with 2 network interfaces: Network of interface eth2 (172.30.0.99) is down and I cannot ...
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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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httpd24 install not possible, unpacking failed

I have a problem with httpd server on centos 7. First package was not updatable, then I remove and try to reinstall httpd24-httpd but I always have following error: error: unpacking of archive failed ...
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How to fix embedded videos slow buffering speed on CentOS 7 server?

The video bufferings when embedded on other websites are so low on speed. It waits a lot of time to buffer the video. When they are playing on own server without embed its okay to buffer. Tried ...
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multisite in apache/httpd in centos 8 : out of three sites, two sites pointing same folder

I am trying configure multisite in centos 8 in Digital Ocean in Apache server, also called httpd for centos. I am following this tutorial. but skipped the permission and SELniux part. The three sites ...
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132 views

How can I install nspr 4.25 on CentOS 7?

I'm trying to resolve a security vulnerability - specifically https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17006 . The general solution is to update packages nspr-0:4.21.0-1.el7 nss-0:3....
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26 views

WSO2 - Analytics Dashboard authentiation with Active Directory

My environment : Centos 7.8 server , installed via yum : wso2ei-6.6.0-1.el7.x86_64 . I follow instruction : "Configuring a Read-Write Active Directory User Store" It works, I can access to &...
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105 views

Disable TCP Offload for CentOS 7 on laptop and VPS

I can disable outgoing and incoming TCP Offload on MACOS in user's .bash_profile file: sudo sysctl net.link.generic.system.hwcksum_tx=0 sudo sysctl net.link.generic.system.hwcksum_rx=0 This stops the ...
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Booting from CD-ROM image with HP server in UEFI mode

I have a ProLiant BL460c Gen9 server, on which I want to install my OS with UEFI mode. After I changed the boot mode to UEFI and disabled secure-boot and tried to boot my Centos7 Image from CD-ROM ...
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nginx several apps on one domain https issue with dotnet core

I'm new to nginx. I want to apply the same scenario in IIS to the nginx. There is a site on IIS and there are 2 applications attached to it. I applied a method but I am not sure if it is a correct ...
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Why Apache /server-status?auto has less information than /server-status

I've configured mod_status on Apache 2.4.6. This is the output from /server-status: Server Version: Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips mod_auth_kerb/5.4 Server MPM: prefork Server Built: Apr 2 ...
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Windows vps performance

Windows vps performance is not as expected while I see this message in /var/log/messages. [ 7283.526915] kvm [34279]: vcpu0 disabled perfctr wrmsr: 0xc2 data 0xffff Its a KVM vps on 3.10.0-1127.19.1....
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59 views

Unable to ssh with authorized keys, password always prompted

I've been through several posts here to try to correct this issue but I am being unable to do so. A few days ago the login to the server with the authorized_keys mapped stopped working, there was no ...
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22 views

How to read binary contents of free disk space in CentOS

Is there a way I can use dd or another tool to view the binary contents of free disk space in CentOS? In case it matters, it's a Linux logical volume with XFS format, holding data only (not a common ...
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I can't access my account after unmounting my home directory and doing lvremove (centos7)

I do not have an IT background. I am working things out on my own, so I would really appreciate your help on this as I am in a panic at the moment. I wanted to increase the size of my /home directory (...
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Slow speeds across gigabit intranet in one direction only

The internal network between two of our dedicated servers is slow in one direction and normal in the other direction. Both servers are running CentOS 7.8.2003. Here I ran an iperf server on the ...
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Why does custom rsyslog log file permissions comes up all questions marks?

This is infuriating me. I have a basic rsyslog.d customization to write a dedicated log file for a service, but the file ownership is all ??? when I try to read it as a non-root user. I feel it's a ...
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32 views

Is there a way to increase the QPS limit for a bind 9 centos server?

I have been benchmark testing 2 DNS servers over the last few days and I am running into the following issue 1 DNS server has a qps per seconf limit of ~6500 qps while the other DNS server gets only ~...
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35 views

How to use rsyslog templates to write log files based on a wildcard syslog facility?

My systemd target/service design has multiple sub-services all uniquely identified. My test.target requires 10 test-@.service instances. The result is target runs and there are 10 identified services....
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91 views

nginx serving wrong certificate for vitual hosts with own conf file

I've got a few virtual hosts set up through nginx on my centos7 server. I'm getting certs by using letsencrypt certbot. By default certbot writes the vhost info to the /etc/nginx/nginx.conf file. This ...
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26 views

block ips with csf using a custom regex from a custom log file

I have wordpress on two web server nodes behind a loadbalancer server (all of them have CSF). All of them are centos7 and also directadmin is installed (if relevant). and I log "failed login IPs&...
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117 views

CentOS 7 yum “database is locked”

Today I wanted to install another PHP-Extension to my virtual server with "yum install php-mbstring" and ran into an error. It said: "database is locked". I already searched alot ...
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39 views

Swap being used when not necessary

I have: vm.swappiness = 1 as suggested here to prevent using Swap when there is plenty of available memory. (0 would completely disable swap, as far as I understand) In frequent cases, I end up with, ...
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126 views

subscription-manager fails with error “'NoneType' object has no attribute '__getitem__'”

when i want to register my redhat machine . i get this type of error. [root@client ~]# subscription-manager register Registering to: subscription.rhsm.redhat.com:443/subscription Username: saiful31 ...
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36 views

Upgrade libseccomp to latest version in airgapped Centos 7 server

I was trying to install docker rpm's in airgapped Centos 7 server and encountered error saying that libseccomp >=2.3 required. --> Finished Dependency Resolution Error: Package: docker-ce-...
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40 views

cant create a DB with Ansible

I have installed MariaDB 10.4 on a CentOS 7 box. The box has MariaDB running and it does not have a root password on the DB. It is only allows local logins. I keep getting the error message below. ...
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64 views

How to estimate how long an rsync of 427GB directory comprises of 470k subdirectories and 4476k files would take?

I have a directory that I want to rsync over a 1Gb LAN to another machine. The rsync command is /usr/bin/rsync -a --delete --numeric-ids --relative --delete-excluded --rsh=/usr/bin/ssh root@machine....
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64 views

Certwatch Falsely Reporting an Expired Cert

This is a bit of a weird one. Every morning I get an email telling me one of my certificates is expired. ################# SSL Certificate Warning ################ Certificate for hostname '*....

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