This post was first published on my Wordpress page link
Usually I’m looking for the path where ubuntu installs some applications, here is a way to do it.
$ sudo dpkg -l | grep name_of_the_app
For example if you want to find what installed applications contains the word ‘emacs’ you have to use this,
$ sudo dpkg -l | grep emacs
ii emacs 23.3+1-1ubuntu9 The GNU Emacs editor (metapackage)
ii emacs23 23.3+1-1ubuntu9 The GNU Emacs editor (with GTK+ user interface)
ii emacs23-bin-common 23.3+1-1ubuntu9 The GNU Emacs editor's shared, architecture dependent files
ii emacs23-common 23.3+1-1ubuntu9 The GNU Emacs editor's shared, architecture independent infrastructure
ii emacsen-common 1.4.22ubuntu1 Common facilities for all emacsen
ii python-ropemacs 0.6c2-4
And then you can find all the files that this application contains.
$ sudo dpkg -L emacs23
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/emacs23
/usr/share/doc/emacs23/copyright
/usr/share/doc/emacs23/README.Debian
/usr/share/lintian
/usr/share/lintian/overrides
/usr/share/lintian/overrides/emacs23
/usr/share/menu
/usr/share/menu/emacs23
/usr/share/emacs
/usr/share/emacs/23.3
/usr/share/emacs/23.3/etc
/usr/share/emacs/23.3/etc/DOC-23.3.1
/usr/share/man
/usr/share/man/man1
/usr/share/applications
/usr/share/applications/emacs23.desktop
/usr/bin
/usr/bin/emacs23-x
/usr/share/doc/emacs23/changelog.Debian.gz
/usr/share/man/man1/emacs23-x.1.gz
/usr/share/man/man1/emacs23.1.gz
/usr/bin/emacs23