What does “ulimit -s unlimited” do?

Question

There are understandably many related questions on stack allocation

What and where are the stack and heap?

Why is there a limit on the stack size?

Si

Answer 1

ulimit -s unlimited lets the stack grow unlimited.

This may prevent your program from crashing if you write programs by recursion, especially if your programs are not tail recursive (compilers can "optimize" those), and the depth of recursion is large.