# Create the files and folders for this example cat > my_file.txt << 'EOF' Understanding Shells A shell is a text-based interface that lets you talk to your computer. EOF cp my_file.txt copy_of_my_file.txt echo "My secret notes" > .my_secret_file printf 'name,score\nAnna,90\nBen,85\n' > report.csv truncate -s 720974 voiceover.wav truncate -s 2377702 Cosmere_RPG_Beta_Rules_Preview.pdf mkdir -p images myfolder/new_directory touch images/1.png images/2.png images/3.png images/4.png cp my_file.txt myfolder/ # Give the files different modification times touch -d "2025-01-15 20:38" Cosmere_RPG_Beta_Rules_Preview.pdf touch -d "2025-04-09 07:47" voiceover.wav touch -d "2025-04-09 07:48" report.csv my_file.txt touch -d "2025-04-09 07:50" copy_of_my_file.txt touch -d "2025-04-09 07:51" images touch -d "2025-04-09 07:52" myfolder ls -t