I have already described how to accurately determine when the system was booted, but there is a simpler solution as you can use /proc filesystem directly.
Start using Docker Swarm to easily manage your containers.
Dockerize rdiff-backup to create personal single-user instance with SSH and web interface provided by rdiffweb.
Update docker-compose configuration file to reduce the size of the container log file before you run out of disk space.
Specify custom SSH port when using rdiff-backup.
This is just a reminder to always enable docker service at system boot.
Create swap file to optimize virtual machine configuration or just immediately increase available swap space.
The short story of my experience with container is marked for removal and cannot be started error
which was caused by driver "overlay" failed to remove root filesystem for ...: remove /var/lib/docker/overlay/.../merged: device or resource busy.
Extract specific file from tar archive.
Sometimes copy and paste inside Vim using mouse over remote connection does not work as expected.