〔debian〕 用apt-get install安装的文件被放到哪里了，比如emacs

dpkg -L <package name>
例如
[user@machine ~]$ dpkg -L emacs22-gtk
/.
/usr
/usr/bin
/usr/bin/emacs22-gtk
/usr/share
/usr/share/man
/usr/share/man/man1
/usr/share/doc
/usr/share/doc/emacs22-gtk
/usr/share/doc/emacs22-gtk/README.Debian
/usr/share/doc/emacs22-gtk/NEWS.Debian.gz
/usr/share/doc/emacs22-gtk/copyright
/usr/share/doc/emacs22-gtk/changelog.Debian.gz
/usr/share/applications
/usr/share/applications/emacs22-gtk.desktop
/usr/share/lintian
/usr/share/lintian/overrides
/usr/share/lintian/overrides/emacs22-gtk
/usr/share/bug
/usr/share/bug/emacs22-gtk
/usr/share/bug/emacs22-gtk/script
/usr/share/bug/emacs22-gtk/control
/usr/share/bug/emacs22-gtk/presubj
/usr/share/menu
/usr/share/menu/emacs22-gtk
/usr/share/man/man1/emacs22-gtk.1.gz

deb文件被备份在 /var/cache/apt/archives/，
至于文件被安装到哪里就要看具体的包了

/var/cache/apt/archives/