General installation path of apt-get software under Linux

apt-get installation directory and installation path: 
After apt-get is downloaded, the software path is: /var/cache/apt/archives 
ubuntu The default PATH is 
PATH=/home/brightman/ bin :/usr/local/s bin : /usr/local/ bin :/usr/sbin: 
/usr/bin:/sbin:/bin:/usr/games 
The apt-get install installation directory is determined by the maintainer of the package, not the user 
$ dpkg -L packagename 
dpkg - L + the name of the package, you can know which file 
system installation software this package contains. Generally, the installation software is in /usr/share, the executable file is in /usr/bin, and the configuration file may be installed in /etc. 
Documentation is generally in /usr/share 
executable file/usr/bin 
configuration file/etc 
lib file/usr/lib