I was following a tutorial and it told me to run sudo chmod +a "SOME_PARAMS" some/dir I was surprised to see that fail telling me chmod: invalid mode: `+a' So I wonder: What does the +a mode ...
GNU date(1) understands the %N format spec, which outputs nanoseconds, so: $ date +%H:%M:%S.%N outputs 19:10:03.725196000 BSD date doesn't understand %N. How can I print the current time with ...
Discussing with Mac owners, I got several versions of where Mac OS X comes from. It is known to have some root in BSD, but how much, and where? Some say that Mac OS X has a FreeBSD kernel, with all ...