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There is big difference between them. ulimit -e only set the RLIMIT_NICE, which is a upper bound value to which the process's nice value can be set using setpriority or nice. renice alters the priority of running process. Doing strace: $ cat test.sh #!/bin/bash ulimit -e 19 Then: $ strace ./test.sh ................................................... ...


2

You can use audit to log the failures of the corresponding system calls (syscalls), although not every excess manifests this way. For example as Henk Langeveld pointed out, exceeding RLIMIT_RTTIME causes the kernel to send a signal. Let's take for example the RLIMIT_NOFILE limit: Specifies a value one greater than the maximum file descriptor number ...



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