HOWTO

Learn best practices for writing Dockerfiles by using VOLUME for all mutable, temporary file locations to enhance performance and maintain cleaner images.

Learn best practices for writing Dockerfiles by using .dockerignore to optimize build times and exclude unnecessary files from the build context.

Learn best practices for writing Dockerfiles to create efficient, secure, and maintainable Docker images, based on real-world experience and insights.

Dowiedz się, jak skasować ostrzeżenie wymiany oleju w samochodzie Ford S-MAX, wykonując kilka prostych kroków.

Learn how to create a fully encrypted ZFS pool on Linux, including steps for generating encryption keys and configuring ZFS for secure data storage.

Learn how to shuck WD Elements 14TB drives for use in a RAID setup, including stress testing and performance considerations for ZFS.

Learn about the initial steps and adjustments needed when transitioning from a Linux desktop to MacOS for business purposes, including tips on keyboard shortcuts, application compatibility, and system settings.

It happen to me all the time that one of developers notifies me about some kind of problem that I can’t confirm from my account. Sometimes it was because of bad ssh keys configuration, other times file permissions, mostly such stuff. It’s sometimes convenient to “enter into someone’s shoes” to see what’s going on there. If you’re root on machine you may do that like this: Switch to developer user su developer - Easy one but that’s not enough for all cases. When you use bastion host (or similar solutions) sometimes users have connection problems and it’s harder to check. When such user have ForwardAgent ssh option enabled you may stole this session to check login problems. ...

Virtualenvs in python are cheap but from time to time you will install something with pip on your system and when time comes removing all this crap could be difficult. I found this bash snippet1 that will uninstall package with all dependencies: Recursive pip uninstall for dep in $(pip show python-neutronclient | grep Requires | sed 's/Requires: //g; s/,//g') ; do pip uninstall -y $dep ; done pip uninstall -y python-neutronclient Depending how you installed it, you might need to use sudo. ...

I’ve been using standard MySQL dumps as backup technique on my VPS for few years. It works fine and backups were usable few times when I needed them. But in other places I’m using xtrabackup1. It’s faster when crating backups and a lot faster when restoring them - they’re binary so there is no need to reevaluate all SQL create tables/inserts/etc. Backups also include my.cnf config file so restoring on other machine should be easy. ...