Linux command to print directory structure in the form of a tree

Is this what you're looking for tree? It should be in most distributions (maybe as an optional install).

~> 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

sample taken from maintainer's web page.

You can add the option -L # where # is replaced by a number, to specify the max recursion depth.

Remove -d to display also files.

You can use this one:

ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/   /' -e 's/-/|/'

It will show a graphical representation of the current sub-directories without files in a few seconds, e.g. in /var/cache/:

   .
   |-apache2
   |---mod_cache_disk
   |-apparmor
   |-apt
   |---archives
   |-----partial
   |-apt-xapian-index
   |---index.1
   |-dbconfig-common
   |---backups
   |-debconf

Source