https://devopstales.github.io/linux/ Recent content in Linuxes on DevOpsTales Hugo -- gohugo.io en Sun, 15 Mar 2026 00:00:00 +0000 https://devopstales.github.io/linux/wazuh-pfsense-syslog/ Sun, 15 Mar 2026 00:00:00 +0000 https://devopstales.github.io/linux/wazuh-pfsense-syslog/ Centralizing pfSense firewall logs in Wazuh SIEM provides critical security visibility and threat detection capabilities. This updated guide for 2026 covers pfSense 2.7.x/2.8.x and Wazuh 4.8+ with proper syslog formatting and decoder configuration. https://devopstales.github.io/linux/pfsense-ad-join/ Thu, 05 Mar 2026 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-ad-join/ Joining clients to an Active Directory domain requires specific firewall ports to be open. This updated guide for 2026 covers the minimum and recommended ports for Windows 11/Server 2022+ domain joins, including pfSense firewall configuration examples. https://devopstales.github.io/linux/proxmox-haproxy-lb/ Thu, 05 Oct 2023 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-haproxy-lb/ In thist post I will show you how to configure HAproxy to Load Balancer between the Proxmox VE Web interfaces and get a single hostname for your cluster. https://devopstales.github.io/linux/wazuh-authentication/ Tue, 05 Sep 2023 00:00:00 +0000 https://devopstales.github.io/linux/wazuh-authentication/ In this post I will show you how to configure LDAP Authentication in a Wazuh Open Source SIEM solution. https://devopstales.github.io/linux/wazuh-siem/ Fri, 01 Sep 2023 00:00:00 +0000 https://devopstales.github.io/linux/wazuh-siem/ In this post I will show you how to install and configure the Wazuh Open Source SIEM solution. https://devopstales.github.io/linux/proxmox-reload-network/ Mon, 22 May 2023 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-reload-network/ The correct way to remove nod from proxmox cluster. https://devopstales.github.io/linux/ssh-credential-in-keepassxc/ Wed, 15 Mar 2023 00:00:00 +0000 https://devopstales.github.io/linux/ssh-credential-in-keepassxc/ In this post I will show you how to use KeePassXC to store your ssh credentials. https://devopstales.github.io/linux/docker-credential-in-keepassxc/ Fri, 10 Mar 2023 00:00:00 +0000 https://devopstales.github.io/linux/docker-credential-in-keepassxc/ In this post I will show you how to use KeePassXC to store your docker credentials on Linux. https://devopstales.github.io/linux/proxmox-dark-theme/ Wed, 11 Jan 2023 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-dark-theme/ In thist post I will show you how to customize Proxmox VE Web UI with dark theme. https://devopstales.github.io/linux/proxmox-fail2ban/ Wed, 11 Jan 2023 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-fail2ban/ In thist post I will show you how you can protect your Proxmox server from broutforce http and ssh login atacks with fail2ban. https://devopstales.github.io/linux/proxmox-custom-certificate/ Sun, 08 Jan 2023 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-custom-certificate/ In thist post I will show you how to configure your custom certificate on proxmox. https://devopstales.github.io/linux/proxmox-cluster-join-error/ Sat, 07 Jan 2023 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-cluster-join-error/ In thist post I will show you how to sold the problem local node address: cannot use IP at cluster join. https://devopstales.github.io/linux/graylog5-pfsense/ Tue, 20 Dec 2022 00:00:00 +0000 https://devopstales.github.io/linux/graylog5-pfsense/ We will parse the log records generated by the PfSense Firewall. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/linux/graylog5-install/ Mon, 19 Dec 2022 00:00:00 +0000 https://devopstales.github.io/linux/graylog5-install/ Graylog is defined in terms of log management platform for collecting, indexing, and analyzing both structured and unstructured data from almost any source. https://devopstales.github.io/linux/pfsense-suidproxy/ Sat, 12 Nov 2022 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-suidproxy/ In this post I will show you how you can install squid proxy on pfsense and configure as a transparent proxy. https://devopstales.github.io/linux/pfsense-ipsec-mss-clamping/ Wed, 28 Sep 2022 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-ipsec-mss-clamping/ In this post I will setup an IPSec dynamic route-based vpn tunnel between two pfSense Appliances. https://devopstales.github.io/linux/prometheus-misbehaving-unexpected-end-of-json-input/ Tue, 26 Apr 2022 00:00:00 +0000 https://devopstales.github.io/linux/prometheus-misbehaving-unexpected-end-of-json-input/ In this blog post I will show you how I solwed the Prometheus: unexpected end of JSON input error. https://devopstales.github.io/linux/running_and_building_multi_arch_containers/ Sun, 20 Mar 2022 00:00:00 +0000 https://devopstales.github.io/linux/running_and_building_multi_arch_containers/ I this post I will show you how you can run AMD Docker Containers on x86 environment adn build multi CPU architecture images. https://devopstales.github.io/linux/brew-repo/ Sat, 05 Feb 2022 00:00:00 +0000 https://devopstales.github.io/linux/brew-repo/ I this post I will show you in a Step-by-Step guide how cou can create your own Homebrew repository on GitHub. https://devopstales.github.io/linux/ceph-full-osd/ Wed, 12 Jan 2022 00:00:00 +0000 https://devopstales.github.io/linux/ceph-full-osd/ In this post I will show you what can you do whet an OSD is full and the ceph cluster is locked. https://devopstales.github.io/linux/ceph-change-journal-ssd/ Sun, 12 Dec 2021 00:00:00 +0000 https://devopstales.github.io/linux/ceph-change-journal-ssd/ In this post I will show you how you can change the end of life journal SSD in Ceph. https://devopstales.github.io/linux/pfsense-ha-ipsec/ Sat, 18 Sep 2021 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-ha-ipsec/ In this post I will setup an IPSec dynamic route-based vpn tunnel between two pfSense Appliances. https://devopstales.github.io/linux/graylog_kafka/ Sat, 20 Mar 2021 00:00:00 +0000 https://devopstales.github.io/linux/graylog_kafka/ Graylog supports Apache Kafka as a transport for various inputs such as GELF, syslog, and Raw/Plaintext inputs. The Kafka topic can be filtered by a regular expression and depending on the input, various additional settings can be configured. https://devopstales.github.io/linux/graylog4-pfsense/ Mon, 15 Mar 2021 00:00:00 +0000 https://devopstales.github.io/linux/graylog4-pfsense/ We will parse the log records generated by the PfSense Firewall. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/linux/graylog4-install/ Sun, 14 Mar 2021 00:00:00 +0000 https://devopstales.github.io/linux/graylog4-install/ Graylog is defined in terms of log management platform for collecting, indexing, and analyzing both structured and unstructured data from almost any source. https://devopstales.github.io/linux/gns3-linux-install/ Wed, 10 Mar 2021 00:00:00 +0000 https://devopstales.github.io/linux/gns3-linux-install/ What is GNS3? GNS3 is used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks. GNS3 allows you to run a small topology consisting of only a few devices on your laptop, to those that have many devices hosted on multiple servers or even hosted in the cloud. Architecture GNS3 consists of two software components the GNS3-all-in-one software GUI client and the server. When you create topologies in GNS3 GUI client the created device need to run on the server. The ser ver can be a local GNS3 server in a GNS3 VM or on a Remote host. https://devopstales.github.io/linux/jitsi-jibri/ Wed, 21 Oct 2020 00:00:00 +0000 https://devopstales.github.io/linux/jitsi-jibri/ In this post I will show you my productivity tips with kubectlyo can install Jibri the recording component of Jitsi. https://devopstales.github.io/linux/jitsi-meet/ Tue, 20 Oct 2020 00:00:00 +0000 https://devopstales.github.io/linux/jitsi-meet/ In this post I will show you how you can install Jitsi meet on your server. https://devopstales.github.io/linux/install-unifi-controller/ Mon, 12 Oct 2020 00:00:00 +0000 https://devopstales.github.io/linux/install-unifi-controller/ In this post I will show you how to install Unifi Controller on Debian 10 Buster. https://devopstales.github.io/linux/chef-first-cookbook/ Thu, 07 May 2020 00:00:00 +0000 https://devopstales.github.io/linux/chef-first-cookbook/ I this post I will show you how you can create a basic chef structure. https://devopstales.github.io/linux/chef-server-install/ Thu, 30 Apr 2020 00:00:00 +0000 https://devopstales.github.io/linux/chef-server-install/ Chef is a powerful configuration management utility writy in ruby. This post will help you to setup a chef 13 on CentOS 7 https://devopstales.github.io/linux/ceph_backup_benji/ Mon, 24 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/ceph_backup_benji/ In this article I will show you how to use benji to backup CEPH RBD incrementally. https://devopstales.github.io/linux/networkmanagger-dnsmasq/ Mon, 24 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/networkmanagger-dnsmasq/ Imagine you want to test something in a demo setup with 5 machines. You create the necessary VMs in your local environment – but you cannot address them properly by name. With 5 machines you also need to write down the appropriate IP addresses – that’s hardly practical. https://devopstales.github.io/linux/pgbackrest_backup_to_s3/ Fri, 21 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/pgbackrest_backup_to_s3/ In this article I will show you how to use pgBackRest to backup PostgreSQL servers to S3 buckets. https://devopstales.github.io/linux/pgbackrest_backup_server/ Thu, 20 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/pgbackrest_backup_server/ In this article I will show you how to use pgBackRest in a dedicated backup server to backup remote PostgreSQL servers. https://devopstales.github.io/linux/postgresql_pgbackrest/ Wed, 19 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/postgresql_pgbackrest/ In this article I will show you how to use pgBackRest as a backup program for PostgreSQL. https://devopstales.github.io/linux/postgresql_pg_rewind/ Wed, 05 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/postgresql_pg_rewind/ In this pos I will show you how to perform a rewind on a broken Streamin replication. https://devopstales.github.io/linux/postgresql_replication/ Mon, 03 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/postgresql_replication/ In this pos I will show you how to configure Postgresql Streamin replication. https://devopstales.github.io/linux/speed_up_zfs/ Sun, 12 Jan 2020 00:00:00 +0000 https://devopstales.github.io/linux/speed_up_zfs/ In this article I will show you how speed up zfs. https://devopstales.github.io/linux/rundeck-acl/ Tue, 10 Dec 2019 00:00:00 +0000 https://devopstales.github.io/linux/rundeck-acl/ In this post I will configure access control in Rundeck. https://devopstales.github.io/linux/rundeck-ldap/ Mon, 09 Dec 2019 00:00:00 +0000 https://devopstales.github.io/linux/rundeck-ldap/ In this post I will configure Rundeck to use LDAP as a User backend. https://devopstales.github.io/linux/docker-on-fedora31/ Wed, 04 Dec 2019 00:00:00 +0000 https://devopstales.github.io/linux/docker-on-fedora31/ On Fedora 31 after starting docker container some error as follows because of cgroups v2. https://devopstales.github.io/linux/graylog-pfsense-squid/ Sun, 24 Nov 2019 00:00:00 +0000 https://devopstales.github.io/linux/graylog-pfsense-squid/ We will parse the access log records generated by PfSense and squid plugin. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/linux/install-squid/ Mon, 18 Nov 2019 00:00:00 +0000 https://devopstales.github.io/linux/install-squid/ Squid is the most popular Proxy server for Linux systems. The squid proxy server is also useful for the web packet filtering. https://devopstales.github.io/linux/foreman-pxe/ Thu, 07 Nov 2019 00:00:00 +0000 https://devopstales.github.io/linux/foreman-pxe/ Foreman is a complete lifecycle management tool for physical and virtual servers. We give system administrators the power to easily automate repetitive tasks, quickly deploy applications, and proactively manage servers, on-premise or in the cloud. https://devopstales.github.io/linux/elasticsearch-backup/ Sat, 07 Sep 2019 00:00:00 +0000 https://devopstales.github.io/linux/elasticsearch-backup/ Graylog store the log data in elasticsearch so I will show you how to create and restore snapshot with elasticsearch. https://devopstales.github.io/linux/s3cmd-with-radosgw/ Sun, 04 Aug 2019 00:00:00 +0000 https://devopstales.github.io/linux/s3cmd-with-radosgw/ s3cmd is a cli utility for s3. https://devopstales.github.io/linux/clonedeploy/ Wed, 17 Jul 2019 00:00:00 +0000 https://devopstales.github.io/linux/clonedeploy/ I’ll show you how to create network booting (PXE) with clusterdeploy. https://devopstales.github.io/linux/pxe1/ Tue, 16 Jul 2019 00:00:00 +0000 https://devopstales.github.io/linux/pxe1/ Have you ever needed to troubleshoot or diagnose a problematic computer and you forgot where the utility CD is? We’ll show you how to utilize network booting (PXE) to make that problem a thing of the past. https://devopstales.github.io/linux/graylog3-pfsense/ Thu, 04 Jul 2019 00:00:00 +0000 https://devopstales.github.io/linux/graylog3-pfsense/ We will parse the log records generated by the PfSense Firewall. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/linux/graylog3-install/ Mon, 24 Jun 2019 00:00:00 +0000 https://devopstales.github.io/linux/graylog3-install/ Graylog is defined in terms of log management platform for collecting, indexing, and analyzing both structured and unstructured data from almost any source. https://devopstales.github.io/linux/install-mattermost-for-gitlab/ Sun, 09 Jun 2019 00:00:00 +0000 https://devopstales.github.io/linux/install-mattermost-for-gitlab/ Mattermost is an open source on premise alternative of Slack. https://devopstales.github.io/linux/gitlab-install/ Wed, 05 Jun 2019 00:00:00 +0000 https://devopstales.github.io/linux/gitlab-install/ Install Gitab with custom postgresql and nginx proxy. https://devopstales.github.io/linux/sonarkube-install/ Thu, 30 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/sonarkube-install/ Sonarqube Repository OSS is an artifact repository with universal support for popular formats. https://devopstales.github.io/linux/opnsense-openvpn/ Sat, 25 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/opnsense-openvpn/ In this LAB I will be creating OpenVPN SSL Peer to Peer connection. https://devopstales.github.io/linux/opnsense-nextcloud/ Sat, 25 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/opnsense-nextcloud/ In this LAB I will be configurate the opnsense cloud backup solutuon for nextcloud. https://devopstales.github.io/linux/opnsense-ha/ Fri, 24 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/opnsense-ha/ In this post I will configure 2 opnsense server to a HA cluster. https://devopstales.github.io/linux/hashicorp-vault/ Fri, 17 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/hashicorp-vault/ Hashicorp vault is a highly scalable, highly available, environment agnostic way to generate, manage, and store secrets. https://devopstales.github.io/linux/katello-client/ Sat, 04 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/katello-client/ Katello brings the full power of content management alongside the provisioning and configuration capabilities of Foreman. Katello is the upstream community project from which the Red Hat Satellite product is derived after Red Hat Satellite Server 6. https://devopstales.github.io/linux/katello-errata/ Thu, 02 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/katello-errata/ Katello brings the full power of content management alongside the provisioning and configuration capabilities of Foreman. Katello is the upstream community project from which the Red Hat Satellite product is derived after Red Hat Satellite Server 6. https://devopstales.github.io/linux/awx-install/ Tue, 30 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/awx-install/ AWX is an open source web application that provides a user interface, REST API, and task engine for Ansible. https://devopstales.github.io/linux/awx-docker/ Tue, 30 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/awx-docker/ AWX is an open source web application that provides a user interface, REST API, and task engine for Ansible. https://devopstales.github.io/linux/ipmitool-config/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/ipmitool-config/ The Intelligent Platform Management Interface (IPMI) is a set of computer interface specifications for an autonomous computer subsystem that provides management and monitoring capabilities independently of the host CPU, firmware (BIOS or UEFI) and operating system. https://devopstales.github.io/linux/spacewalk-software-channels/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/spacewalk-software-channels/ In this post I will show you how to create software channels on spacewalk server. https://devopstales.github.io/linux/pfsense-2fa/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-2fa/ This article explains how to set up OpenVPN with Google Authenticator on pfSense. https://devopstales.github.io/linux/katello-install/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/katello-install/ Katello brings the full power of content management alongside the provisioning and configuration capabilities of Foreman. Katello is the upstream community project from which the Red Hat Satellite product is derived after Red Hat Satellite Server 6. https://devopstales.github.io/linux/privacyidea-install/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/privacyidea-install/ privacyIDEA is a Two Factor Authentication System which is multi-tenency- and multi-instance-capable. It is opensource, written in Python and hosted at GitHub. https://devopstales.github.io/linux/spacewalk-install/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/spacewalk-install/ Spacewalk is an open source Linux systems management solution. Spacewalk is the upstream community project from which the Red Hat Satellite product is derived before Red Hat Satellite Server 6. https://devopstales.github.io/linux/update-ilo/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/update-ilo/ Integrated Lights-Out, or iLO, is a proprietary embedded server management technology by Hewlett-Packard which provides out-of-band management facilities. https://devopstales.github.io/linux/proxmox-mail-gateway/ Sun, 28 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-mail-gateway/ Proxmox Mail Gateway is a full featured, open-source mail proxy and protects your mail server from spam, viruses, trojans and phishing emails. https://devopstales.github.io/linux/pfsense-usg/ Sat, 27 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-usg/ I will show you how to create a site-to-site VPN for pfSense and unifi usg. https://devopstales.github.io/linux/harbor-install/ Thu, 18 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/harbor-install/ Vmware harbor ia an open source trusted cloud native registry project that stores, signs, and scans content. https://devopstales.github.io/linux/pfsense-cert/ Mon, 15 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-cert/ I will show you how to Enable SSL for pfSense. https://devopstales.github.io/linux/pfsense-wlan/ Fri, 12 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-wlan/ In this pos I will create a WAN failower configuration. https://devopstales.github.io/linux/pfsense-openvpn/ Thu, 11 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-openvpn/ In this LAB I will be creating OpenVPN SSL Peer to Peer connection. https://devopstales.github.io/linux/pfsense-ha/ Wed, 10 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/pfsense-ha/ In this post I will configure 2 pfsense server to a HA cluster. https://devopstales.github.io/linux/rundeck/ Tue, 09 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/rundeck/ Rundeck is open source software that powers self-service operations. https://devopstales.github.io/linux/nextcloud/ Mon, 08 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/nextcloud/ Nextcloud is a suite of client-server software for creating and using file hosting services. Nextcloud application functionally is similar to Dropbox. https://devopstales.github.io/linux/redmine/ Sat, 06 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/redmine/ Redmine is a free and open source, web-based project management and issue tracking tool. I will install it on Ubuntu becous on CetOS there in no pre build package for redmine. https://devopstales.github.io/linux/openproject/ Fri, 05 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/openproject/ Openproject is a free and open source, web-based project management and issue tracking tool. https://devopstales.github.io/linux/install-ceph/ Tue, 12 Mar 2019 00:00:00 +0000 https://devopstales.github.io/linux/install-ceph/ Ceph is free and open source distributed objectstorage solution. With Ceph we can easily provide and manage block storage, object storage and file storage. https://devopstales.github.io/linux/ceph-block-device/ Tue, 12 Mar 2019 00:00:00 +0000 https://devopstales.github.io/linux/ceph-block-device/ Ceph block devices are thin-provisioned, resizable and store data striped over multiple OSDs in a Ceph cluster. Ceph block devices leverage RADOS capabilities such as snapshotting, replication and consistency. Ceph’s RADOS Block Devices (RBD) interact with OSDs using kernel modules or the librbd library. https://devopstales.github.io/linux/ceph-cephfs/ Tue, 12 Mar 2019 00:00:00 +0000 https://devopstales.github.io/linux/ceph-cephfs/ The Ceph Filesystem (CephFS) is a POSIX-compliant filesystem that uses a Ceph Storage Cluster to store its data. The Ceph filesystem uses the same Ceph Storage Cluster system as Ceph Block Devices, Ceph Object Storage with its S3 and Swift APIs, or native bindings (librados). https://devopstales.github.io/linux/proxmox-node-remove/ Thu, 07 Mar 2019 00:00:00 +0000 https://devopstales.github.io/linux/proxmox-node-remove/ The correct way to remove nod from proxmox cluster. https://devopstales.github.io/linux/install-postgresql/ Thu, 10 Jan 2019 00:00:00 +0000 https://devopstales.github.io/linux/install-postgresql/ In this pos I will show you how to install Postgresql on difrent Linux distributions.