symlink for a command - affected by its location

Question

I created a symlink for an executable in /usr/bin which didnt work. But I created the same in /usr/local/bin which worked the way I expected. How are these two different?

Both the above locations are present in my $PATH.

Answer 1

Where was the symlink to, how did you create it, and what happened
when "it didn't work"? Do you still have the creation commands in your
history?

Comments

Actual location of command- ~/Sources/nodejs/bin/node
Command -   cd "-->till bin "
                   sudo ln -s node /usr/bin  [executing node didnt work]
                   sudo ln -s node /usr/local/bin  [executing node worked as expected]