Although the way of thinking differs depending on the operating system, in general /usr/local and below, it is used to keep compiled oneself.
/usr/bin and /bin put the standard command of the system, but place other thing in /usr/local/bin.
[vagrant@localhost app]$ echo $PATH
/home/vagrant/.pyenv/plugins/pyenv-virtualenv/shims:/home/vagrant/.pyenv/shims:/home/vagrant/.pyenv/bin:/home/vagrant/.rbenv/shims:/home/vagrant/.rbenv/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/vagrant/bin
u, that’s strange..
