How to enable TCP port 2375 for external connection on Rancher-Desktop
Racher-Desktop users can have the Docker engine accept TCP connections alongside docker.sock with the following command: docker container run -dt --name expose-docker-on-2375 --
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DevOps & containers.
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Ansible Tutorial - Directory layout and Example
Ansible is agentless configuration management using SSH. This tutorial explains directory layout for organizing YAML tasks for easier editing and reuse.
How to fix "loopback devices is strongly discouraged for production use" on Docker
Docker 1.6+ on CentOS 7 or RHEL 7 may warn that loopback devices are strongly discouraged for production use when using devicemapper storage.
How to fix "SSL_connect ... certificate verify failed" on puppet client
After installing the Puppet client, # puppet agent --test connects to the Puppet master but may produce: err: Could not retrieve catalog from remote server: SSL…
How to install SendmailAnalyzer on Zimbra mail
SendmailAnalyzer is a log analysis program that helps administrators examine an overview of incoming and outgoing email in graphs and reports, with hourly, daily, and monthly views.
How to monitor Zimbra services
Monitoring and checking Zimbra mail services is important for system administrators, who need to learn promptly when the system fails.
How to monitor messages statistics of Zimbra mail server
Zimbra provides monitoring that helps check system status and performance effectively, but it lacks monitoring of email sending and receiving statistics that would help administrators.
ZABBIX Monitoring Installation and Consulting Services
ZABBIX is an enterprise monitoring system that goes beyond server and network monitoring. It efficiently monitors servers running any operating system and network devices by combining monitoring and alerts…
Use SNMP and MRTG to monitor CPU, MEM and Disk use status
The previous article on installing MRTG with IOSTAT adapted monitoring-tool commands for use with MRTG. This differs from the usual approach of using SNMP to send status information…
Setup MRTG to monitor CPU workload , Memory and Disk use status with IOSTAT.
This MRTG setup adapts monitoring tools to display hardware status. Scripts are needed for each hardware metric; this article uses IOSTAT tools.