Learn the Linux which command to find executable locations in PATH. Discover when to use which vs type vs whereis, troubleshoot conflicts with -a, and master command resolution.
I still remember the first time a user complained that "the internet was slow." Fresh out of college, armed with my shiny new CS degree, I confidently ran ping and saw... perfectly fine response times. The problem? I was only checking if the destination was reachable, not where along the path things were breaking down.…