Gangmax Blog

Tree

“tree“ is a recursive directory listing command that produces a depth indented listing of files.

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# Install.
sudo apt-get install tree

# Some options.
-a     All files are printed.  By default tree does not print hidden files (those beginning with a dot `.').  In no event does tree print the file system con‐
              structs `.' (current directory) and `..' (previous directory).
-s     Print the size of each file in bytes along with the name.

-h     Print the size of each file but in a more human readable way, e.g. appending a size letter for kilobytes (K), megabytes (M), gigabytes  (G),  terabytes
              (T), petabytes (P) and exabytes (E).

-p     Print the file type and permissions for each file (as per ls -l).

-D     Print the date of the last modification time or if -c is used, the last status change time for the file listed.

-Q     Quote the names of files in double quotes.

-F     Append a `/' for directories, a `=' for socket files, a `*' for executable files, a `>' for doors (Solaris) and a `|' for FIFO's, as per ls -F

-J     Turn on JSON output. Outputs the directory tree as an JSON formatted array.

--du   For each directory report its size as the accumulation of sizes of all its files and sub-directories (and their files, and so on).  The total amount of used space is also given in the final report (like the 'du -c' command.) This option requires tree to read the entire directory  tree  before  emitting it, see BUGS AND NOTES below.  Implies -s.

--timefmt format
    Prints (implies -D) and formats the date according to the format string which uses the strftime(3) syntax.

# Print the directory tree info in pure text tree format.
tree /media/test -ashpDQF --du --timefmt '%Y-%m-%dT%H:%M:%S%z' > tree.txt

# Print the directory tree info in JSON format.
tree /media/test -aspDJ --du --timefmt '%Y-%m-%dT%H:%M:%S%z' > tree.json

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