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A journey of sys administration

Knowledge Base

Knowledge Base

Knowledge Base
SSH

SSH

Run SSH commands remotely without Key Authentication
Use ProxyJump
Execute SSH commands remotely

Ansible
AWS
AWS - CloudFormation
AWS - CloudWatch
- Installing CloudWatch Agent
Bash
- Check if variable is empty
CircleCI
Database
- Database - MongoDB
  - Create DB for MongoDB container on startup
  - MongoDB - The importance of indexing
- Database - MySQL
  - How to backup MySQL / MariaDB
- Database - PostreSQL
Docker
Git
Grafana
- Grafana Email Notification
Golang
- Inject Build-time vars with Golang
Installation
Jenkins
- Create Jenkins job to deploy files - Publish over SSH
- Jenkins Useful Plugins
Linux
- Linux - Date & Time
  - How to check if date time is synced to NTP
  - How to Fix Time Not Synchronized on Ubuntu Server
- Linux - CLI
- Linux - Filesystem
- Linux - Firewall
  - How to block outgoing connections on Centos / RHEL
  - Firewalld guide
- Linux - Log Management
  - How to manage log files using logrotate
- Linux - Network
  - How to find listening ports
  - How to set Static IP address (Centos / RHEL)
- Linux - Security / Authentication & Authorization
- Linux - SMTP
  - Postfix bounce unknown user
NodeJS
Misc - Wordpress
Python
SSH
SSL
- How to generate certificate - signed by Root CA
- How to create a private Root CA
Vagrant
- Cloning private repos in Vagrant
YAML
- Break string in YAML over multiple lines

Tags

acl backup centos chrony date disk dnf docker docker-compose filesystem firewall firewalld installation linux logrotate logs lvm mysql network ntp permission rhel security services space sudoers systemd time vmware volume yum zabbix

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