> 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.
Or
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.You forgot the "sudo" before "tee"
> write stdin to a file that doesn't also write it to stdout
You mean like "dd of=/path/file" ?
I physically/literally squinted when I saw disk destroyer.
I know it's useful for other things, but it has become a fearful instinct at this point.
I've always thought that there should be `cat -o output-file` flag for that. GNU coreutils have miriads of useless flags and missing one actually useful flag LoL.
And probably `echo -o output-file` as well.
> 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
why not write sh -c then?
Because 'sh' isn't in moreutils and is harder to remember, next question.
Why use something portable when you can use cat pee?
Personally? Because I hate the smell.
It’s not an option or feature because it’s built into the shell. Just slap a > /dev/null on the end.
That works, but it feels wasteful to needlessly copy it, and it is verbose.
Great point, I was running as root so I didn't pick this up. Corrected, thank you!