Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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Linux: Find Largest Files with du Command
To find the largest file in a directory use the command: sudo du -a / 2>/dev/null | sort -n -r | head -n 20, please check here for more information
golang open file and iterate lines
In this tutorial, we are going to explain how to parse a file with go and iterate lines of a file.
How to disable Kali Linux auto-update
Follow this steps to disable apt-get auto updates for Kali: open dconf-editor, then go to org -> gnome -> software, Select 'download-updates'. Finally Scroll down until the end and set
Go Type Conversion Guide: rune to int, string to int, int to string (2026)
Complete Go type conversion guide 2026: rune to int with int(), string to int with strconv.Atoi, int to string with strconv.Itoa, byte to string, int64 conversions. All with working code examples.
Update package.json to Latest Versions
package.json contains information about your project, to update libraries automatically you can use
Different ways to revert git repository commit
To undo last commit not pushed try: git reset --soft HEAD~1. To undo last commit pushed use: git revert HEAD~1. Check this tutorial for more examples!
How to find the mime type of a file in Python?
Here are some example on how to guess the mime type of a file using python. The first example uses the filename only and the second example opens the file to guess the mime type.
PostgreSQL: Update query for JSONB columns with examples
PostgreSQL 9.5 added the type JSONB, which supports json as datatype. Here we show an example on how to perform an UPDATE on a jsonb type using postgresql. If you want to override the whole dict, just send the json between single quotes. check here...
Move LUKS Encrypted Disk to Smaller SSD
In this tutorial, we are going to move a linux encrypted disk to a new one. In particular, we are going to move from an old hard drive to a brand new SSD (but smaller). This tutorial also works for moving encryted disk to a bigger disk.