I install pex file like this when building the container:

RUN curl -fL https://github.com/pex-tool/pex/releases/download/v2.13.0/pex -o /usr/local/bin/pex
RUN chmod +x /usr/local/bin/pex

When I run it and check the type, it gives me “tracked alias”. The pip from the same directory shows differently:

$ type pip
pip is /usr/local/bin/pip
$ type pex
pex is a tracked alias for /usr/local/bin/pex

But looks the same with ls -la /usr/local/bin:

-rwxr-xr-x 1 root root 4190750 Jul 30 15:00 pex
-rwxr-xr-x 1 root root     226 Jul 23 07:24 pip

What does it mean?