Quick reference on how to work with (not only) DO spaces

Use tool called
s3cmd

Initialize:
s3cmd --configure

List buckets:
s3cmd ls

List files:
s3cmd la --recursive

journalctl -u service.name

In order to check whether is logrotate correct use (dry run):
logrotate -d -f /etc/logrotate.d/mongodb

Actualy test a logrotate
logrotate -v -f /etc/logrotate.d/mongodb

repmgr primary register — initialise a repmgr installation and register the primary node
repmgr primary unregister — unregister an inactive primary node
repmgr standby clone — clone a PostgreSQL standby node from another PostgreSQL node

Install required packages
apt install apt-file
apt-file update
apt-file list package_name

List systemd service start time
systemd-analyze blame

Docker notes, related to docker-compose mostly

List running "physicall node"
docker node ls

List services on node
docker service ls

docker service ps SERVICE_ID

docker stack ls

ansible hostname -m setup

File operators: