# apt-file > Search for files in apt packages, including ones not yet installed. > More information: . - Update the metadata database: `sudo apt update` - Search for packages that contain the specified file or path: `apt-file {{search|find}} {{part/of/filename}}` - List the contents of a specific package: `apt-file {{show|list}} {{package_name}}` - Search for packages that match the regular expresssion given in `pattern`: `apt-file {{search|find}} --regexp {{pattern}}`