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Questions tagged [centos]

CentOS is a free (as in beer and speech) GNU/Linux distribution that is community driven and based on source code released from RedHat.

CentOS is a free (as in beer and speech) GNU/Linux distribution that is community driven and based on source code released from RedHat. CentOS aims to be 100% binary compatible with RedHat Enterprise Linux. CentOS mainly changes packages to remove upstream vendor branding and artwork.

Support & Lifecycle

Each CentOS version is maintained for up to 10 years and a new version is released approximately every 2 years.

+----------+-------------- +---------------+---------------------+
|  Version | Release date  |  Full updates | Maintenance updates |
+----------+---------------+---------------+---------------------+
| 3        | 19 March 2004 | 20 July 2006  |31 October 2010      |
| 4        | 9 March 2005  | 31 March 2009 |29 February 2012     |
| 5        | 12 April 2007 | Q1 2014       |31 March 2017        |
| 6        | 10 July 2011  | Q2 2017       |30 November 2020     |
| 7        | 7 July 2014   | Q4 2020       |30 June 2024         |
+----------+---------------+---------------+---------------------+

External Resources:

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How to Install Apache Solr / Java on CentOS?

I've seen only one or two tutorials for installing Solr, and particularly Java, on a CentOS machine, and they seem to be overly complex; heck, I can't quite figure out which version of Java (it seems there are many) to install... I'm not a full time…
geerlingguy
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Can't connect to mysql on remote server

I have several machines running CentOS, one of which is set up as the mysql server. I had been running this for a while, and was able to connect to mysql from the remote machines with no problem, but after a power outage and restart of all the PCs,…
Steven Linden
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Configuring PHP for existing MySQL installation

I am taking over basic administration duties for a former tech employee for my client. On a CentOS server I have the following: Apache, PHP and MySQL. He had PHP installed but did not configure it with the MySQL extension (I assume because the…
Jake Wilson
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Package temperature above threshold, cpu clock throttled

I have 2 HPE Proliant DL360 Gen10 servers that are configured nearly the same. They both run CentOS 7.5. The only differences are that one has newer firmware and kernel, in an attempt to fix this problem. dmesg is reporting the following…
Kerry Knopp
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CentOS 4.6 Time Drift

I have a CentOS 4.6 box that was previously a physical device, and has been made into a VM, that has a cronjob to restart the server everyday at 23:00. Which is fine. However, since the shift to virtual (on a Hyper-V host) neither the system time or…
D-Man
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Stop showing output from command in background

I have a 1 liner that will write the output of a telnet session to a file. while sleep 5; do sleep 1 | telnet 11.22.33.44 443 | tee -a /var/tmp/test$(date +%Y%m%d).txt && date >> /var/tmp/test$(date +%Y%m%d).txt; done & I do not want to see the…
Anthony Fornito
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Enable ssh for CentOS system bound to Active Directory?

I have a CentOS 5.4 system successfully bound to Active Directory. "net ads testjoin" says it's OK. I can run "id username" for AD users and see their accounts. However, I cannot log in remotely via SSH. /var/log/secure says the password is…
royco
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Delayed start for Guests KVM/libvirt

Looking for any pointers anyone may have to introduce a delayed start for KVM guests i.e. 30 seconds between starting each virtual server rather than starting them all at once which thrashes the disks and actually just ends up taking a lot longer to…
Backtogeek
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CentOS 7 SNMP port always closed

I have a CentOS 7 server in which I opened up ports for SNMP connections. Even though I can see the ports open here: [matias@Centos_7_VM ~]$ sudo firewall-cmd --list-all [sudo] password for matias: public (active) target: default …
Matias Barrios
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CentOS 7 custom service failure (Interactive authentication required)

I am trying to setup an OFBiz fork called Scipio as a service on CentOS 7. The service wrapper script changes the user to a dedicated one for the program. All of the program's files are owned and in the group under that dedicated user name. If I…
BuvinJ
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Clone a remote Linux server with rsync and migrate it locally as Virtual Machine

I have a CentOS6.9 Linux server remotely on a VPS Provider and I need to clone my remote server on my local computer as a Virtual Machine for examination purposes. I made a full server backup without compression to another remote server (rsync.net)…
Cadmos
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How to install tun/tap driver for openvpn on centos linux?

How to install tun/tap driver for openvpn on centos linux? Best wishes for you.
M.Rezaei
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kubectl top is trying to connect to heapster instead of metrcis server

According to readme in heapster repo, the project is now deprecated. The current recommended solution is to use the metrics server which acorrding to documentation can be accessed by using kubectl top. I have deployed it on my bare-metal CentOs…
Djent
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How to tag the outgoing packets with the correct VLAN ID?

I have a virtual machine CentoS running on VMware workstation 12 player on my PC (windows 7) and i am trying to configure the VM to be able to reach my client network. Please see the attached photo to have an idea about what i am trying to do. My…
Networking
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Client did not present a certificate (Postfix)

I have postfix SMTP relay which have been configured with TLS option. Now just realized when sending email to gmail (for example) using Microsoft outlook,found out this "Client did not present a certificate" on the recipient's mail header Received:…
David A
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