tree

$ tree /etc/apt
/etc/apt
├── apt.conf.d
│   ├── 00aptitude
│   ├── 00cdrom
│   ├── 00recommends
│   ├── 00trustcdrom
│   ├── 01autoremove
│   ├── 01autoremove-kernels
│   ├── 20changelog
│   ├── 20dbus
│   ├── 50unattended-upgrades
│   ├── 70debconf
│   └── 99synaptic
├── apt-file.conf
├── preferences.d
│   ├── official-extra-repositories.pref
│   └── official-package-repositories.pref
├── sources.list
├── sources.list.d
│   ├── cernekee-ppa-trusty.list
│   ├── getdeb.list
│   ├── google-chrome.list
│   ├── neovim-ppa-unstable-trusty.list
│   ├── noobslab-icons-trusty.list
│   ├── noobslab-themes-trusty.list
│   ├── numix-ppa-trusty.list
│   ├── official-package-repositories.list
│   └── snwh-pulp-trusty.list
├── trustdb.gpg
├── trusted.gpg
├── trusted.gpg~
└── trusted.gpg.d

4 directories, 27 files

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