文件导航CLI Manual

$tree

Display directory structure in a recursive visual tree diagram.

命令语法POSIX Standard

tree [OPTIONS] [DIRECTORY]

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`tree` is a recursive directory listing program that produces a depth-indented visual tree of files and folders.

Flag / Option	Description
-L [level]	Max display depth of the directory tree.
-d	List directories only without listing files.
-a	All files are listed including hidden files.

#1Visualize directory tree up to depth 2

tree -L 2 /home/user

Outputs folder tree hierarchy.