When I run `sudo echo 1 > /proc/sys/vm/drop_caches` I receive the following error: bash: /proc/sys/vm/drop_caches: Permission denied
I have `%sudo ALL=(ALL:ALL) ALL` in my /etc/sudoers file. All commands should be allowed for group sudo.
ls -la /proc/sys/vm/drop_caches
--w------- 1 root root 0 Aug 14 16:28 /proc/sys/vm/drop_caches
I tried adding group permissions with `sudo chmod 440 /proc/sys/vm/drop_caches` and receive the following error message chmod: changing permissions of '/proc/sys/vm/drop_caches': Operation not permitted
If I run `sudo sh -c "/usr/bin/echo 1 > /proc/sys/vm/drop_caches"` it works. Why does `
sudo echo 1 > /proc/sys/vm/drop_caches` not work, so frustrating.
Tim
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