Topics
Security
Data formats
Text
Linux and network
Encoding and conversion
Where to start
First steps
15 stages · From system basics and command input to navigation, files, text, and pipelines.
Track map 11 tracks · 123 stages
Difficulty
New labs
Sections 183 articles
Command index 432
Popular
Read the output
$ printf '%s\n' 'release notes.txt' "$HOME" '$HOME'
release notes.txt
/home/student
$HOME
release
notes.txt