On 1/27/21 3:01 AM, L A Walsh wrote:
Except the problem, which I've run into before, is to
have such a command executable by 'root' and output by 'root', Have
you ever tried to drop your file caches?
need to echo "3" to /proc/sys/vm/drop_caches. Except if you are
a normal user, you need to elevate to root first, but what you
suggest won't work:
echo "3" | sudo cat >/proc/sys/vm/dropcaches
-bash: /proc/sys/vm/drop_caches: Permission denied
Cat isn't writing the file -- bash is.
What is so difficult with
$ echo "3" | sudo sh -c "cat > proc/sys/vm/dropcache"
I don't get it...
regards,
chris
I ended up using
dd at the time, but tq seems more efficient:
echo "3" |sudo tq /proc/sys/vm/dropcaches
(which does work).
