zlacker

>>davidg+(OP)
> sudo echo $NUM_PAGES > /proc/sys/vm/nr_hugepages

This won't work :) echo will run as root but the redirection is still running as the unprivileged user. Needs to be run from a privileged shell or by doing something like sudo sh -c "echo $NUM_PAGES > /proc/sys/vm/nr_hugepages"

The point gets across, though, technicality notwithstanding.

>>kayson+p82
Or

    echo $NUM_PAGES | sudo tee /proc/sys/vm/nr_hugepages 

I've always found it odd that there isn't a standard command to write stdin to a file that doesn't also write it to stdout. Or that tee doesn't have an option to supress writing to stdout.

>>thayne+392
> I've always found it odd that there isn't a standard command to write stdin to a file that doesn't also write it to stdout

If you happen to have moreutils installed, you can do that with pee

    echo $NUM_PAGES | sudo pee 'cat > /proc/sys/vm/nr_hugepages'