Postfix and Dovecot command cheat sheet for RHEL, AlmaLinux, Rocky Linux, Oracle Linux and CentOS Stream: postconf, queue management, lmdb tables, logs, TLS testing, doveadm, firewalld and SELinux.
Step-by-step Postfix and Dovecot mail server setup for RHEL 9/10, AlmaLinux, Rocky Linux, Oracle Linux and CentOS Stream: TLS, SASL submission on 587, IMAPS, LMTP delivery, verification and troubleshooting.
Find a remote computer’s MAC address from Windows using ARP after clearing the cache—useful when identical VMs share names or IPs.
Configure a Linux NIC bond on CentOS for redundancy and load balancing—step-by-step eth0/eth1 bonding as root.
Configure SNMP on CentOS Configure SNMP on CentOS you more than likely will want to do this if you are doing any SNMP monitoring of memory, hard drive, uptime, etc…
Configure Bond Interface Oracle Linux 6 Configure Bond Interface Oracle Linux 6 Multiple NIC bonding in Linux increases availability, and quality of network services. Linux combines multiple Network adapters into…
Configure keepalived for ip failover CentOS 6 Configure keepalived for ip failover CentOS 6 In this scenario we are going to be configuring 2 squid proxy servers to represent one…
Configure TFTP Server CentOS 6 Configure TFTP Server CentOS 6 For this blog, we are going to go over configuring a TFTP server on CentOS 6. This fits the typical…
Configure ISC DHCP Logging Configure DHCP Logging let’s be honest, fishing through /var/log/messages becomes difficult on a big network where 100’s or 1000’s of DHCP exchanges happen. There are some…
Understanding Public DNS Understanding Outside DNS can be very complicated if you do not have a good understanding of it. Basically outside dns works in reverse of the way you…
