--help Outputs a verbose usage listing.

--version
       Outputs the version of tree.

-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 constructs `.'  (current  directory)  and  `..'
       (previous directory).

-d     List directories only.

-f     Prints the full path prefix for each file.

-i     Makes tree not print the indentation lines, useful when used in conjunction with the -f option.

-l     Follows  symbolic  links if they point to directories, as if they were directories. Symbolic links
       that will result in recursion are avoided when detected.

-x     Stay on the current file-system only.  Ala find -xdev.

-P pattern
       List only those files that match the wild-card pattern.  Note: you must use the -a option to  also
       consider those files beginning with a dot `.' for matching.  Valid wildcard operators are `*' (any
       zero or more characters), `?' (any single character), `[...]' (any single character listed between
       brackets  (optional - (dash) for character range may be used: ex: [A-Z]), and `[^...]' (any single
       character not listed in brackets) and `|' separates alternate patterns.

-I pattern
       Do not list those files that match the wild-card pattern.

--noreport
       Omits printing of the file and directory report at the end of the tree listing.

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

-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), terrabytes (T), petabytes (P) and exabytes (E).

-u     Print the username, or UID # if no username is available, of the file.

-g     Print the group name, or GID # if no group name is available, of the file.

-D     Print the date of the last modification time for the file listed.

--inodes
       Prints the inode number of the file or directory

--device
       Prints the device number to which the file or directory belongs

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

-q     Print non-printable characters in filenames  as  question  marks  instead  of  the  default  caret
       notation.

-N     Print non-printable characters as is instead of the default carrot notation.

-v     Sort the output by version.

-r     Sort the output in reverse alphabetic order.

-t     Sort the output by last modification time instead of alphabetically.

--dirsfirst
       List directories before files.

-n     Turn colorization off always, over-ridden by the -C option.

-C     Turn  colorization  on always, using built-in color defaults if the LS_COLORS environment variable
       is not set.  Useful to colorize output to a pipe.

-A     Turn on ANSI line graphics hack when printing the indentation lines.

-S     Turn on ASCII line graphics (useful when using linux console  mode  fonts).  This  option  is  now
       equivalent to `--charset=IBM437' and will eventually be depreciated.

-L level
       Max display depth of the directory tree.

--filelimit #
       Do not descend directories that contain more than # entries.

-R     Recursively  cross  down  the  tree  each  level  directories (see -L option), and at each of them
       execute tree again adding `-o 00Tree.html' as a new option.

-H baseHREF
       Turn on HTML output, including HTTP references. Useful for ftp sites.  baseHREF gives the base ftp
       location when using HTML output. That is, the local directory may be `/local/ftp/pub', but it must
       be    referenced    as    `ftp://hostname.organization.domain/pub'     (baseHREF     should     be
       `ftp://hostname.organization.domain'). Hint: don't use ANSI lines with this option, and don't give
       more than one directory in the directory list. If you wish to use colors via CCS  stylesheet,  use
       the -C option in addition to this option to force color output.

-T title
       Sets the title and H1 header string in HTML output mode.

--charset charset
       Set the character set to use when outputting HTML and for line drawing.

--nolinks
       Turns off hyperlinks in HTML output.

-o filename
       Send output to filename.