Description:
Tree is a recursive directory listing command that produces a depth
indented listing of files, which is colorized ala dircolors if the LS_COLORS
environment variable is set and output is to tty. Tree has been ported and
reported to work under the following operating systems: Linux, FreeBSD, OS X,
Solaris, HP/UX, Cygwin, HP Nonstop and OS/2.
Here is an example of the output of tree:
~> tree -d /proc/self/
/proc/self/
|-- attr
|-- cwd -> /proc
|-- fd
| `-- 3 -> /proc/15589/fd
|-- fdinfo
|-- net
| |-- dev_snmp6
| |-- netfilter
| |-- rpc
| | |-- auth.rpcsec.context
| | |-- auth.rpcsec.init
| | |-- auth.unix.gid
| | |-- auth.unix.ip
| | |-- nfs4.idtoname
| | |-- nfs4.nametoid
| | |-- nfsd.export
| | `-- nfsd.fh
| `-- stat
|-- root -> /
`-- task
`-- 15589
|-- attr
|-- cwd -> /proc
|-- fd
| `-- 3 -> /proc/15589/task/15589/fd
|-- fdinfo
`-- root -> /
27 directories