Adrien wrote:
> Hi,
<snip>
> Also, on my computer, I have the following behaviour:
> 11:44 ~ % sudo echo 0 > /proc/sys/kernel/randomize_va_space
> zsh: permission denied: /proc/sys/kernel/randomize_va_space
> r...@jarjar:~# echo 0 > /proc/sys/kernel/randomize_va_space
> r...@jarjar:~#
> I can't use sudo to write to most files in /proc or /sys: I have to log in
> as root ('su -' does the job just fine).
The redirection (> /proc/sys...) is not part of the sudo invocation, it's a
separate instruction to the *shell* to redirect output of the previous part of
the command to a file and so it runs with *your* uid. There are two ways to
achieve what you're after - one verbose one described in the sudo man page
(essentially you pass the whole command line to sudo quoted) or the easier way:
echo 0| sudo tee /proc/sys/kernel/randomize_va_space
You can add > /dev/null if tee's outputting of the 0 to stdout is for some
reason annoying.
David
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