Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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What is a virtualenv and how to install it?
Learn how to isolate a python application with virtualenv the easiest way.
How to XZ a directory with TAR for maximum compression?
XZ is a lossless data compression algorithm that has the better compression ratio, learn how to use it on Linux here.
How to undo last commit not pushed?
Here we explain how to undo or fix wrong commited files to Git that were not pushed to external repository.
How to check that a file or directory exists with Python?
For checking if a file exists with Python 3 you can use the Path python3 Path class from pathlib module. The Path class has the method exists and is\_file. We also give some examples with Python 2 using the os.path.isfile function.
Postgres query performance analysis and optimization
Learn how to analyze and optimize postgres query performance with an example.
How to add or resize swap partition on Ubuntu 16.04
Learn how to add more swap space to Ubuntu 16.04. Also learn how to resize a swap partition.
Scanning vulnerabilities on Ubuntu 16.04
Learn how to use the vuls scanner to scan for vulnerabilities in ubuntu 16.04 and other Linux systems.
How to install GO language
Easy steps to install GO lenguage in a Linux system.
PostgreSQL Configuration Tuning
Learn how to tune PostgreSQL for optimal performance. Configure shared_buffers, work_mem, effective_cache_size and other key parameters.
Setup ssh keys for authentication
See all the details on how to setup and use ssh keys for authentication.