Is there a way to limit time and memory resources for running a bash command?

Question

Basically I want to run my compiled C++ code and limit execution time (to a second for example) and memory (to 100k) like the online judges. Is it possible by adding options to the command? This has to be done without modifying the source code of course.

Answer 1

Try ulimit command, it can set limits on CPU time and memory.

Try this example

bash -c 'ulimit -St 1 ; while true; do true; done;'

The result you will get will be

CPU time limit exceeded (core dumped)